TS4956_技术文档

TS4956

Stereo audio amplifier system with I²C bus interface

■ Operating from V = 2.7 V to 5.5 V

CC

■ I²C bus control interface

TS4956 - Flip-Chip18

■ 38 mW output power @ V = 3.3 V,

CC

THD = 1%, F = 1 kHz, with 16Ω Load

■ Ultra low consumption in standby mode: 0.5 µA

■ Digital volume control range from +12 dB to

-34 dB

■ 32-step digital volume control

2

■ Stereo loudspeaker option by I C

■ 8 different output mode selections

■ Pop & click reduction circuitry

Pin connections (top view)

■ Flip-chip package, 18 bumps with 300 µm

PGH

RIN

MLO

GND

diameter

■ Lead-free flip chip package

LHP-

RHP+

■ Output power limitation on headphone for

VCC

SDA

eardrum damage consideration

BYPASS

SRN-

LIN

I2CVCC

Description

MIN

MIP

SRP+

The TS4956 is a complete audio system device

with three dedicated outputs, one stereo

GND

SCL

headphone, one loudspeaker drive and one mono

line for a hands-free set. The stereo headphone is

capable of delivering more than 25 mW per

channel of continuous average power into 16Ω

single-ended loads with 0.3% THD+N from a 5 V

power supply. The device functions are controlled

via an I²C bus, which minimizes the number of

external components needed.

Applications

■ Mobile phones (cellular / cordless)

■ PDAs

The overall gain and the different output modes of

the TS4956 are controlled digitally by the control

registers which are programmed via the I²C

interface. It has also an internal thermal shutdown

protection mechanism.

■ Laptop / notebook computers

■ Portable audio devices

Device summary table

Part Number

Temperature Range

Package

Packing

Marking

TS4956EIJT

-40°C to +85°C

Lead free flip-chip18

Tape & Reel

56

May 2006

Rev. 3

1/51

www.st.com

51

Absolute maximum ratings & operating conditions

TS4956

1

Absolute maximum ratings & operating conditions

Table 1.

Symbol

Absolute maximum ratings (AMR)

Parameter

Value

Unit

(1)

V

Supply voltage

6

V

CC

(2)

V

Input voltage

G

to V

ND CC

i

T

Operating free air temperature range

Storage temperature

-40 to + 85

°C

oper

T

-65 to +150

°C

stg

T

Maximum junction temperature

150

°C

j

(3)

R

Thermal resistance junction to ambient

200

°C/W

thja

diss

(4)

P

Power dissipation

Internally limited

(5)

Susceptibility - human body model

2

kV

V

ESD

Susceptibility - machine model

150

200

260

Latch-up Latch-up immunity

Lead temperature (soldering, 10sec)

1. All voltage values are measured with respect to the ground pin.

2. The magnitude of input signal must never exceed V_CC+ 0.3V / GND - 0.3V

3. Device is protected in case of over temperature by a thermal shutdown activated at 150°C.

mA

°C

4. Exceeding the power derating curves during a long period may involve abnormal operating conditions.

5. Human body model, 100 pF discharged through a 1.5 kΩ resistor, into pin to V_CCdevice

Table 2.

Operating conditions

Symbol

Parameter

Value

Unit

(1)

V

Supply voltage

Load resistor

2.7 to 5.5V

V

CC

R

Ω

Speaker/BTL output (modes 1,2,7)

≥8

L

Headphone, MLO output (modes 3,4,5,6,)

≥16

Load capacitor

R = 8Ω to 100Ω (Speaker/BTL output - modes 1,2,7)

500

400

L

C

pF

R = 16Ω to 100Ω (Headphone, MLO output - modes

L

3,4,5,6)

R > 100Ω

100

L

(2)

R

Flip-chip thermal resistance junction to ambient

90

°C/W

thja

1. For proper functionality of I2C bus, V_CCpins must not be grounded. ESD protection diodes ground data

and clock wires and cause dysfunction of I²C bus in this condition.

2. With heat sink surface 120mm²

Table 3.

I²C electrical characteristics

Parameter

Symbol

Value

Unit

2

(1)

I CV

I2C supply voltage

2.7V to 5.5V

0.3 I2CVCC

0.7 I2CVCC

10

V

CC

V

Maximum low level input voltage on pins SDA, SCL

Minimum high level input voltage

ILl

V

IH

IN

I

Maximum input current (pins SDA, SCL), 0.4V < V < 4.5V

µA

kHz

V

in

F

SCL maximum clock frequency

400

SCL

V

Max low level output voltage, SDA pin, I

= 3mA

sink

0.4

ol

1. Must be less or equal than power supply voltage V_CCof the device

2/51

TS4956

Typical application schematic

2

Typical application schematic

Table 4.

External components descriptions

Functional description

Components

C , C

Supply bypass capacitors which provide power supply filtering.

Bypass capacitor which provides half-supply filtering.

s1

s2

C

b

Input capacitors which form together with input impedance Z first-order high pass

in

to C

in1

in4

filter to block DC voltage on inputs

Output capacitor which forms with output load R first-order high pass filter to block

half-supply voltage on single-ended output.

L

C

R

out

1

Resistor to keep C

charged for better pop performance on single-ended output.

out

Figure 1.

Typical application for the TS4956 (mode 1, 2, 3, 4, 5, 6)

Vcc

Cs1

1µF

Cs2

100nF

TS4956

MODE3: Gx(MIP+MIN)

MODE4: GxLIN

LHPAmplifier

PHGAmplifier

RHP Amplifier

Diff. input +

Cin1

Stereo

A1 MIP

LHP

PHG

RHP

B6

A7

16/32 Ohms

+

Input Left

330nF

Cin2

Stereo

A2 MIN

+

Input Right

330nF

Diff. input -

MODE3: Gx(MIP+MIN)

MODE4: GxRIN

Mode

Select

D6

B2

D2

E7

16/32 Ohms

SE input left

Cin3

MODE1: Gx(MIP+MIN)

MODE2: Gx(LIN+RIN)

LIN

RIN

Stereo

Speaker Amplifier

B4

A5

+

330nF

Input Left

SRP+

8 Ohms

SRN-

SE input right

Stereo

Cin4

MODE5: Gx(MIP+MIN)

MODE6: Gx(LIN+ RIN)

MLO Amplifier

Input Right

+

Cout

+

330nF

MLO

220µF

R1

1k

16/32 Ohms

Digital volume

control

Bias

I2C

BYPASS

I2CVCC

Cb

I2CVCC

SCL

1µF

SDA

I2CBUS

3/51

Typical application schematic

TS4956

Figure 2.

Typical application for the TS4956 (mode 7)

Vcc

Cs1

1µF

Cs2

100nF

TS4956

LHP Amplifier

PHGAmplifier

RHP Amplifier

Stereo

Input Left

A1 MIP

LHP

PHG

RHP

B6

A7

MODE7: BTL - GxRIN

Stereo

Input Right

A2 MIN

8 Ohms

Mode

Select

D6

B2

D2

E7

SE input left

Cin3

LIN

RIN

Stereo

Input Left

Speaker Amplifier

B4

A5

+

MODE7: GxLIN

330nF

SRP+

SRN-

SE input right

8 Ohms

Stereo

Input Right

Cin4

MLO Amplifier

+

330nF

MLO

Digital volume

control

Bias

I2C

BYPASS

I2CVCC

Cb

I2CVCC

SCL

1µF

SDA

I2CBUS

4/51

TS4956

Typical application schematic

2.1

I²C interface

The TS4956 uses a serial bus, which conforms to the I²C protocol (the TS4956 must be

powered when it is connected to I²C bus), to control the chip’s functions via two wires: Clock

and Data.

The Clock line and the Data line are bidirectional (open-collector) with an external chip pull-

up resistor (typically 10 kΩ). The maximum clock frequency in fast-mode specified by the I²C

standard is 400kHz, and this frequency is supported by the TS4956. In this application, the

TS4956 is always the slave device and the controlling MCU is the master device.

2

The I2CVCC pin determines the power supply of the TS4956’s I C interface. The voltage

connected to this pin must be equal or less than the TS4956 power supply voltage V . The

CC

minimum value of the I2CVCC voltage is 2.7V.

2

When the I2CVCC pin is connected to an I C voltage, the TS4956 is ready to communicate

2

via the I C bus.

When the I2CVCC pin is connected to the ground, the TS4956 is in total standby mode, with

an ultra low standby current on the order of a few nanoamperes. In this condition the

2

TS4956 cannot receive I C command from the I C bus.

In both cases, pins SDA and SCL must respect logic HI or logic LOW thresholds (not

floating) presented in Table 3 on page 2, in order for the circuit to function properly.

Table on page 5 summarizes the pin descriptions for the I²C bus interface.

Table 5.

I²C bus interface: pin descriptions

Functional description

SDA

SCL

This is the serial data pin

This is the clock input pin

2

I2CVCC

I C interface power supply

2.1.1

I²C operation description

The host MCU can write into the TS4946 control register to control the TS4956 and read

from the control register to get the current configuration of the TS4956. The TS4956 is

addressed by a single byte consisting of a 7-bit slave address and an R/W bit. The TS4956

control register address is $5Dh.

Table 6.

A6

The first byte after the START message for addressing the device

A5

A4

A3

A2

A1

A0

Rw

1

0

1

0

1

X

In order to write data into the TS4956 control register, after the “start” message the MCU

must send the following data:

●

send byte with the I²C 7-bit slave address and with the R/W bit set low

send the data (control register setting)

●

All bytes are sent with MSB bit first. The transfer of written data ends with a “stop” message.

When transmitting several data, the data can be written with no need to repeat the “start”

message and addressing byte with the slave address.

5/51

Typical application schematic

TS4956

In order to read data from the TS4956, after the “start” message, the MCU must send and

receive the following data:

●

send byte with the I²C 7-bit slave address and with the R/W bit set high

receive the data (control register value)

●

All bytes are read with MSB bit first. The transfer of read data is ended with “stop” message.

When transmitting several data, the data can be read with no need to repeat the “start”

message and the byte with slave address. In this case the value of control register is read

repeatedly.

Figure 3.

I²C read/write operation

SLAVE ADDRESS

CONTROL REGISTERS

A

P

1

S

1

0

1

0

D7 D6 D5 D4 D3

D2 D1 D0

SDA

Output

Mode settings

Stop condition

Volume Control

settings

Start condition

R/W

Acknowledge

from Slave

Acknowledge

from Slave

(1)

Table 7.

Output mode selection: G from -34.5dB to + 12dB (by steps of 1.5dB)

Output Mode #

RHP

LHP

Speaker P/N

Mono L/O

0

1

2

3

4

5

6

7

SD

Gx (MIP + MIN)

GX (RIN + LIN)

GX (MIP + MIN)

G x RIN

SD

GX (MIP + MIN)

G x LIN

SD

GX (MIP + MIN)

GX (RIN + LIN)

SD

BTL: G x RIN

G x LIN

1. SD = Shutdown Mode

G = Audio Gain

MIP = Mono Input Positive

MIN = Mono Input Negative

RIN = Stereo Input Right

LIN = Stereo Input Left

6/51

TS4956

Typical application schematic

2.1.2

Gain and mode setting operations

The gain of the TS4956 ranges from -34.5dB to +12 dB. At power-up, output channels are

set to stand-by mode.

Table 8.

G: Gain (dB) #

-34.5

Gain settings truth table

D7 (MSB)

D6

D5

D4

D3

0

1

0

1

0

1

0

1

0

1

0

1

0

1

0

1

0

1

0

1

0

1

0

1

0

1

0

1

0

1

0

1

0

1

0

1

0

1

0

1

0

1

0

1

0

1

0

1

0

1

0

1

0

1

0

1

0

1

0

1

0

1

-33

-31.5

-30

-28.5

-27

-25.5

-24

-22.5

-21

-19.5

-18

-16.5

-15

-13.5

-12

-10.5

-9

-7.5

-6

-4.5

-3

-1.5

0

+1.5

+3

+4.5

+6

+7.5

+9

+10.5

+12

7/51

Typical application schematic

TS4956

Table 9.

D2

Output mode settings truth table

D1

D0

COMMENTS

0

1

0

1

0

1

0

1

0

1

0

1

0

1

OUTPUT MODE 0

OUTPUT MODE 1

OUTPUT MODE 2

OUTPUT MODE3

OUTPUT MODE 4

OUTPUT MODE 5

OUTPUT MODE 6

OUTPUT MODE 7

2.1.3

Acknowledge

The number of data bytes transferred between the start and the stop conditions from the

CPU master to the TS4956 slave is unlimited. Each byte of eight bits is followed by one

acknowledge bit.

The TS4956 which is addressed, generates an acknowledge after the reception of each

byte that has been clocked out.

8/51

TS4956

Electrical characteristics

3

Electrical characteristics

Table 10.

Symbol

V

= +2.7 V, GND = 0V, T

= 25°C (unless otherwise specified)

amb

CC

Parameter

Conditions

Min. Typ. Max.

Unit

Mode 1, 2, No input signal, no load

Mode 3, No input signal, no load

Mode 4, No input signal, no load

Mode 5, 6, No input signal, no load

Mode 7, No input signal, no load

No input signal

3.4

4.6

4.4

6

I

Supply Current

Standby Current

4.4

5.7

2.3

7.4

2

mA

µA

CC

1.75

5.7

I

0.5

STBY

No input signal

Modes 1, 2

Speaker Output, R = 8Ω

Mode 3

5

50

20

L

V

Output Offset Voltage

Headphone Outputs, R = 16Ω

mV

OO

L

Mode 4

Headphone Outputs, R = 16Ω

L

Mode 7

BTL, Speaker Output, R = 8Ω

L

Modes 3, 4

THD+N = 1% max, F = 1kHz, R = 16Ω

THD+N = 1% max, F = 1kHz, R = 32Ω

Headphone Output Power

(Phantom Ground mode)

30

20

35

25

L

BTL, Speaker Output

Power

Modes 1, 2, 7

THD+N = 1% max, F = 1kHz, R = 8Ω

P

mW

out

270

285

L

Modes 5, 6

MLO Output Power

THD+N = 1% max, F = 1kHz, R = 16Ω

35

20

42

25

L

THD+N = 1% max, F = 1kHz, R = 32Ω

L

G = +1.5dB, 20Hz < F < 20kHz

Modes 1, 2, 7, R = 8Ω, P = 200mW

0.5

Total Harmonic Distortion

+ Noise

L

out

THD+N

%

Modes 3, 4, R = 16Ω, P = 15mW

L

out

Modes 5, 6, R = 16Ω, P = 30mW

L

out

F = 217Hz, G = +1.5dB, V

= 200mVpp,

ripple

Inputs Grounded, C = 1µF

b

Mode 1, Speaker output, R = 8Ω

60

55

61

75

62

57

73

L

Mode 2, Speaker output, R = 8Ω

L

Power Supply Rejection

Ratio

Mode 3, Headphone outputs, R = 16Ω

PSRR

dB

L

(1)

Mode 4, Headphone outputs, R = 16Ω

L

Mode 5, MLO output, R = 16Ω

L

Mode 6, MLO output, R = 16Ω

L

Mode 7, BTL, Speaker outputs, R = 8Ω

L

9/51

Electrical characteristics

TS4956

Unit

Table 10.

Symbol

V

= +2.7 V, GND = 0V, T

= 25°C (unless otherwise specified)

amb

CC

Parameter

Conditions

Min. Typ. Max.

Mode 4

F = 1kHz, R = 16Ω, P = 15mW

50

L

out

F = 20Hz to 20kHz, R = 16Ω, P = 15mW

L

out

Crosstalk Channel Separation

dB

Mode 7

F = 1kHz, R = 8Ω, P = 200mW

80

60

L

out

F = 20Hz to 20kHz, R = 8Ω, P = 200mW

L

out

A-weighted, G = +1.5dB, THD+N < 0.5%,

20Hz < F < 20kHz

Mode 1 - Speaker output, R = 8Ω

91

90

84

90

85

92

L

Mode 2 - Speaker output, R = 8Ω

L

Mode 3 - Headphone output, R = 16Ω

L

SNR

Signal To Noise Ratio

dB

Mode 4 - Headphone output, R = 16Ω

L

Mode 5 - MLO output, R = 16Ω

L

Mode 6 - MLO output, R = 16Ω

Mode 7 - BTL, Speaker output, R = 8Ω,

L

G = +10.5dB

G

Digital Gain Range

Digital Gain Stepsize

Stepsize Error

-34.5

0.1

+12

0.6

dB

1.5

Differential input

Differential input impedance (MIP to MIN)

MIP input impedance referenced to ground

MIN input impedance referenced to ground

50

25.5

38

60

30

45

70

34.5

62

Input Impedance, all Gain

setting

Z

kΩ

in

Stereo input

RIN input impedance

LIN input impedance

25.5

30

34.5

t

Wake up time

Standby time

70

1

90

ms

µs

WU

t

STBY

1. Dynamic measurements - 20*log(rms(V_out)/rms(V_ripple)). V_rippleis an added sinus signal to V_CC@ f = 217Hz.

10/51

TS4956

Electrical characteristics

Table 11.

Symbol

V

= +3.3 V, GND = 0V, T

= 25°C (unless otherwise specified)

amb

CC

Parameter

Conditions

Min. Typ. Max. Unit

Mode 1, 2, No input signal, no load

Mode 3, No input signal, no load

Mode 4, No input signal, no load

Modes 5, 6, No input signal, no load

Mode 7, No input signal, no load

No input signal

3.6

4.8

4.6

1.8

6

4.7

6.2

6

I

Supply Current

Standby Current

mA

µA

CC

2.4

7.8

2

I

0.5

STBY

No input signal

Modes 1, 2

Speaker Output, R = 8Ω

Mode 3

5

50

20

L

V

Output Offset Voltage

Headphone Outputs, R = 16Ω

mV

OO

L

Mode 4

Headphone Outputs, R = 16Ω

L

Mode 7

BTL, Speaker Output, R = 8Ω

L

Modes 3, 4

THD+N = 1% max, F = 1kHz, R = 16Ω

THD+N = 1% max, F = 1kHz, R = 32Ω

Headphone Output Power

(Phantom Ground Mode)

(1)

32

30

38

36

L

(1)

L

BTL, Speaker Output

Power

Modes 1, 2, 7

THD+N = 1% max, F = 1kHz, R = 8Ω

P

mW

out

430

450

L

Modes 5, 6

MLO Output Power

THD+N = 1% max, F = 1kHz, R = 16Ω

58

32

65

38

L

THD+N = 1% max, F = 1kHz, R = 32Ω

L

G = +1.5dB, 20Hz < F < 20kHz

Total Harmonic Distortion Modes 1, 2, 7, R = 8Ω, P = 300mW

0.5

L

out

THD+N

%

+ Noise

Modes 3, 4, R = 16Ω, P = 15mW

L out

Modes 5, 6, R = 16Ω, P = 50mW

L

out

F = 217Hz, G = +1.5dB, V

= 200mVpp,

ripple

Inputs Grounded, C = 1µF

b

Mode 1, Speaker output, R = 8Ω

63

57

63

77

64

58

74

L

Mode 2, Speaker output, R = 8Ω

L

Power Supply Rejection

Ratio

Mode 3, Headphone outputs, R = 16Ω

PSRR

dB

L

(2)

Mode 4, Headphone outputs, R = 16Ω

L

Mode 5, MLO output, R = 16Ω

L

Mode 6, MLO output, R = 16Ω

L

Mode 7, BTL, Speaker outputs, R = 8Ω

L

Mode 4

F = 1kHz, R = 16Ω, P = 15mW

50

L

out

F = 20Hz to 20kHz, R = 16Ω, P = 15mW

L

out

Crosstalk Channel Separation

dB

Mode 7

F = 1kHz, R = 8Ω, P = 300mW

80

60

L

out

F = 20Hz to 20kHz, R = 8Ω, P = 300mW

L

out

11/51

Electrical characteristics

TS4956

Table 11.

Symbol

V

= +3.3 V, GND = 0V, T

= 25°C (unless otherwise specified)

amb

CC

Parameter

Conditions

Min. Typ. Max. Unit

A-weighted, G = +1.5dB, THD+N < 0.5%,

20Hz < F < 20kHz

Mode 1 - Speaker output, R = 8Ω

93

92

L

Mode 2 - Speaker output, R = 8Ω

L

Mode 3 - Headphone output, R = 16Ω

85

dB

91

L

SNR

Signal To Noise Ratio

Mode 4 - Headphone output, R = 16Ω

L

Mode 5 - MLO output, R = 16Ω

Mode 6 - MLO output, R = 16Ω

Mode 7 - BTL, Speaker output, R = 8Ω,

G = +10.5dB

87

95

L

G

Digital Gain Range

Digital Gain Stepsize

Stepsize Error

-34.5

+12

0.6

dB

1.5

0.1

50

Differential input

Differential input impedance (MIP to MIN)

60

30

45

70

34.5

62

MIP input impedance referenced to ground 25.5

Input Impedance, all Gain

setting

MIN input impedance referenced to ground

38

Z

kΩ

in

Stereo input

RIN input impedance

LIN input impedance

25.5

30

34.5

t

Wake up time

Standby time

70

1

90

ms

µs

WU

t

STBY

1. Internal power limitation on headphone outputs (see application information).

2. Dynamic measurements - 20*log(rms(V_out)/rms(V_ripple)). V_rippleis an added sinus signal to V_CC@ F = 217Hz.

12/51

TS4956

Electrical characteristics

Table 12.

Symbol

V

= +5 V, GND = 0V, T

= 25°C (unless otherwise specified)

amb

CC

Parameter

Conditions

Min. Typ. Max. Unit

Mode 1, 2, No input signal, no load

Mode 3, No input signal, no load

Mode 4, No input signal, no load

Modes 5, 6, No input signal, no load

Mode 7, No input signal, no load

No input signal

4

5.2

6.9

6.8

2.5

8.7

2

5.3

5.2

1.9

6.7

0.5

I

Supply Current

Standby Current

mA

µA

CC

I

STBY

No input signal

Modes 1, 2

Speaker Output, R = 8Ω

Mode 3

5

50

20

L

V

Output Offset Voltage

Headphone Outputs, R = 16Ω

mV

OO

L

Mode 4

Headphone Outputs, R = 16Ω

L

Mode 7

BTL, Speaker Output, R = 8Ω

L

Modes 3, 4

THD+N = 1% max, F = 1kHz, R = 16Ω

THD+N = 1% max, F = 1kHz, R = 32Ω

Headphone Output Power

(Phantom Ground Mode)

(1)

32

35

39

43

L

(1)

L

BTL, Speaker Output

Power

Modes 1, 2, 7

THD+N = 1% max, F = 1kHz, R = 8Ω

P

mW

out

1000 1055

L

Modes 5, 6

MLO Output Power

THD+N = 1% max, F = 1kHz, R = 16Ω

140

80

150

88

L

THD+N = 1% max, F = 1kHz, R = 32Ω

L

G = +1.5dB, 20Hz < F < 20kHz

Total Harmonic Distortion Modes 1, 2, 7, R = 8Ω, P = 700mW

0.5

L

out

THD+N

%

+ Noise

Modes 3, 4, R = 16Ω, P = 15mW

L out

Modes 5, 6, R = 16Ω, P = 100mW

L

out

F = 217Hz, G = +1.5dB, V

= 200mVpp,

ripple

Inputs Grounded, C = 1µF

b

Mode 1, Speaker output, R = 8Ω

66

60

65

78

66

61

75

L

Mode 2, Speaker output, R = 8Ω

L

Power Supply Rejection

Ratio

Mode 3, Headphone outputs, R = 16Ω

PSRR

dB

L

(2)

Mode 4, Headphone outputs, R = 16Ω

L

Mode 5, MLO output, R = 16Ω

L

Mode 6, MLO output, R = 16Ω

L

Mode 7, BTL, Speaker outputs, R = 8Ω

L

Mode 4

F = 1kHz, R = 16Ω, P = 15mW

50

L

out

F = 20Hz to 20kHz, R = 16Ω, P = 15mW

L

out

Crosstalk Channel Separation

dB

Mode 7

F = 1kHz, R = 8Ω, P = 700mW

80

60

L

out

F = 20Hz to 20kHz, R = 8Ω, P = 700mW

L

out

13/51

Electrical characteristics

TS4956

Table 12.

Symbol

V

= +5 V, GND = 0V, T

= 25°C (unless otherwise specified)

amb

CC

Parameter

Conditions

Min. Typ. Max. Unit

A-weighted, G = +1.5dB, THD+N < 0.5%,

20Hz < F < 20kHz

Mode 1 - Speaker output, R = 8Ω

96

L

Mode 2 - Speaker output, R = 8Ω

L

Mode 3 - Headphone output, R = 16Ω

85

dB

91

L

SNR

Signal To Noise Ratio

Mode 4 - Headphone output, R = 16Ω

L

Mode 5 - MLO output, R = 16Ω

Mode 6 - MLO output, R = 16Ω

Mode 7 - BTL, Speaker output, R = 8Ω,

G = +10.5dB

90

98

L

G

Digital Gain Range

Digital Gain Stepsize

Stepsize Error

-34.5

+12

0.6

dB

1.5

0.1

50

Differential input

Differential input impedance (MIP to MIN)

60

30

45

70

34.5

62

MIP input impedance referenced to ground 25.5

Input Impedance, all Gain

setting

MIN input impedance referenced to ground

38

Z

kΩ

in

Stereo input

RIN input impedance

LIN input impedance

25.5

30

34.5

t

Wake up time

Standby time

70

1

90

ms

µs

WU

t

STBY

1. Internal power limitation on headphone outputs (see application information).

2. Dynamic measurements - 20*log(rms(V_out)/rms(V_ripple)). V_rippleis an added sinus signal to V_CC@ F = 217Hz.

Table 13.

Output noise V = 2.7V to 5.5V (all inputs grounded)

CC

G = +12dB

Unweighted

G = +10.5dB

G = +1.5dB

Unweighted

filter

(20Hz -

20kHz)

filter

A-weighted

filter

A-weighted

filter

(20Hz -

20kHz)

A-weighted

filter

(20Hz -

20kHz)

V

(µV)

V

(µV)

V

(µV)

V

(µV)

V

(µV)

V

(µV)

out

Mode1 - SPK out

Mode2 - SPK out

Mode3 - LHP, RHP

Mode4 - LHP, RHP

Mode5 - MLO

54

80

67

100

45

66

67

55

29

53

65

29

99

80

43

80

96

42

75

68

35

66

73

35

111

100

52

45

23

45

23

69

67

34

66

67

34

97

Mode6 - MLO

106

52

Mode7 - BTL, SPK out

14/51

TS4956

Electrical characteristics

Figure 4.

THD+N vs. output power

Figure 5.

THD+N vs. output power

10

Vcc=5V

F=20kHz

Mode 1, 2 - SPK out

RL = 8Ω, G = +10.5dB

BW < 125kHz

Vcc=5V

F=20kHz

Mode 1, 2 - SPK out

RL = 8Ω, G = +1.5dB

BW < 125kHz

Tamb = 25°C

Vcc=3.3V

F=20kHz

Vcc=3.3V

F=20kHz

Tamb = 25

°

C

1

Vcc=2.7V

F=20kHz

0.1

Vcc=2.7V

F=20kHz

Vcc=5V

F=1kHz

Vcc=2.7V

F=1kHz

Vcc=3.3V

F=1kHz

Vcc=3.3V

F=1kHz

Vcc=2.7V

F=1kHz

Vcc=5V

F=1kHz

0.01

0.1

1

0.01

0.1

1

Output power (W)

Figure 6.

THD+N vs. output power

Figure 7.

THD+N vs. output power

10

Mode 1, 2 - SPK out

RL = 16Ω, G = +1.5dB

BW < 125kHz

Tamb = 25

Mode 1, 2 - SPK out

RL = 16Ω, G = +10.5dB

BW < 125kHz

Vcc=5V

F=20kHz

Vcc=5V

F=20kHz

Vcc=3.3V

F=20kHz

Vcc=3.3V

F=20kHz

°

C

Tamb = 25°C

1

0.1

1

0.1

Vcc=2.7V

F=20kHz

Vcc=2.7V

F=20kHz

Vcc=5V

F=1kHz

Vcc=3.3V

F=1kHz

Vcc=2.7V

F=1kHz

Vcc=5V

F=1kHz

Vcc=2.7V

F=1kHz

Vcc=3.3V

F=1kHz

0.01

0.1

Output power (W)

1

0.01

0.1

1

Output power (W)

Figure 8.

THD+N vs. output power

Figure 9.

THD+N vs. output power

10

Mode 3 - LHP, RHP

RL = 16Ω, G = +10.5dB

BW < 125kHz

Mode 3 - LHP, RHP

RL = 16Ω, G = +1.5dB

BW < 125kHz

Tamb = 25°C

Vcc=5V

F=20kHz

Vcc=5V

F=20kHz

Tamb = 25°C

1

Vcc=2.7V

F=20kHz

Vcc=3.3V

F=20kHz

Vcc=3.3V

F=20kHz

Vcc=2.7V

F=20kHz

0.1

Vcc=5V

F=1kHz

Vcc=5V

F=1kHz

Vcc=3.3V

F=1kHz

Vcc=2.7V

F=1kHz

Vcc=3.3V

F=1kHz

Vcc=2.7V

F=1kHz

0.01

1E-3

0.01

Output power (W)

0.1

1E-3

0.01

Output power (W)

0.1

15/51

Electrical characteristics

TS4956

Figure 10. THD+N vs. output power

Figure 11. THD+N vs. output power

10

Mode 3 - LHP, RHP

RL = 32

BW < 125kHz

Tamb = 25

Ω, G = +1.5dB

RL = 32

BW < 125kHz

Tamb = 25

Ω, G = +10.5dB

°

C

°

C

1

Vcc=2.7V

F=20kHz

Vcc=2.7V

F=20kHz

0.1

Vcc=5V

F=1kHz

Vcc=5V

F=1kHz

Vcc=3.3V Vcc=5V

F=20kHz F=20kHz

Vcc=2.7V

F=1kHz

Vcc=3.3V Vcc=5V

F=20kHz F=20kHz

Vcc=2.7V

F=1kHz

Vcc=3.3V

F=1kHz

Vcc=3.3V

F=1kHz

0.01

1E-3

0.01

0.1

1E-3

0.01

0.1

Output power (W)

Figure 12. THD+N vs. output power

Figure 13. THD+N vs. output power

10

Mode 4 - LHP, RHP

RL = 16Ω, G = +10.5dB

BW < 125kHz

Mode 4 - LHP, RHP

RL = 16Ω, G = +1.5dB

BW < 125kHz

Tamb = 25°C

Vcc=5V

F=20kHz

1

0.1

1

Vcc=2.7V

F=20kHz

Vcc=3.3V

F=20kHz

Vcc=5V

F=20kHz

Vcc=2.7V

F=20kHz

Vcc=3.3V

F=20kHz

0.1

Vcc=2.7V

F=1kHz

Vcc=3.3V

F=1kHz

Vcc=2.7V

F=1kHz

Vcc=3.3V

F=1kHz

Vcc=5V

F=1kHz

Vcc=5V

F=1kHz

0.01

1E-3

0.01

Output power (W)

0.1

1E-3

0.01

Output power (W)

0.1

Figure 14. THD+N vs. output power

Figure 15. THD+N vs. output power

10

Mode 4 - LHP, RHP

RL = 32Ω, G = +1.5dB

BW < 125kHz

Mode 4 - LHP, RHP

RL = 32Ω, G = +10.5dB

BW < 125kHz

Tamb = 25°C

Vcc=5V

F=20kHz

Vcc=5V

F=20kHz

Tamb = 25°C

1

0.1

1

0.1

Vcc=2.7V

F=20kHz

Vcc=3.3V

F=20kHz

Vcc=2.7V

F=20kHz

Vcc=3.3V

F=20kHz

Vcc=5V

F=1kHz

Vcc=2.7V

F=1kHz

Vcc=2.7V

F=1kHz

Vcc=5V

F=1kHz

Vcc=3.3V

F=1kHz

Vcc=3.3V

F=1kHz

0.01

1E-3

0.01

0.1

1E-3

0.01

0.1

Output power (W)

16/51

TS4956

Electrical characteristics

Figure 16. THD+N vs. output power

Figure 17. THD+N vs. output power

10

Mode 5, 6 - MLO

RL = 16Ω, G = +1.5dB

BW < 125kHz

Mode 5, 6 - MLO

RL = 16Ω, G = +10.5dB

BW < 125kHz

Vcc=5V

F=20kHz

Vcc=5V

F=20kHz

Tamb = 25°C

1

0.1

1

Vcc=5V

F=1kHz

Vcc=5V

F=1kHz

Vcc=2.7V

F=20kHz

Vcc=2.7V

F=20kHz

0.1

0.01

Vcc=3.3V

F=20kHz

Vcc=3.3V

F=20kHz

Vcc=2.7V

F=1kHz

Vcc=2.7V

F=1kHz

Vcc=3.3V

F=1kHz

Vcc=3.3V

F=1kHz

0.01

1E-3

0.01

0.1

1

1E-3

0.01

0.1

1

Output power (W)

Figure 18. THD+N vs. output power

Figure 19. THD+N vs. output power

10

Mode 5, 6 - MLO

RL = 32Ω, G = +10.5dB

BW < 125kHz

Mode 5, 6 - MLO

RL = 32Ω, G = +1.5dB

BW < 125kHz

Vcc=5V

F=20kHz

Vcc=5V

F=20kHz

Tamb = 25°C

Vcc=5V

F=1kHz

Vcc=5V

F=1kHz

1

0.1

1

Vcc=2.7V

F=20kHz

Vcc=2.7V

F=20kHz

Vcc=2.7V

F=1kHz

Vcc=2.7V

F=1kHz

0.1

Vcc=3.3V

F=20kHz

Vcc=3.3V

F=20kHz

Vcc=3.3V

F=1kHz

Vcc=3.3V

F=1kHz

0.01

1E-3

0.01

0.1

1E-3

0.01

0.1

Output power (W)

Figure 20. THD+N vs. output power

Figure 21. THD+N vs. output power

10

Vcc=5V

F=20kHz

Mode 7 - BTL, SPK out

RL = 16Ω, G = +10.5dB

BW < 125kHz

Mode 7 - BTL, SPK out

RL = 8Ω, G = +10.5dB

BW < 125kHz

Tamb = 25°C

Vcc=5V

F=20kHz

Vcc=3.3V

F=20kHz

Tamb = 25°C

1

0.1

Vcc=2.7V

F=20kHz

Vcc=2.7V

F=20kHz

Vcc=3.3V

F=20kHz

Vcc=2.7V

F=1kHz

0.1

Vcc=5V

F=1kHz

Vcc=3.3V

F=1kHz

Vcc=2.7V

F=1kHz

Vcc=3.3V

F=1kHz

Vcc=5V

F=1kHz

0.01

1E-3

0.01

0.1

1

1E-3

0.01

0.1

1

Output power (W)

17/51

Electrical characteristics

TS4956

Figure 22. THD+N vs. frequency

Figure 23. THD+N vs. frequency

10

Mode 1, 2 - SPK out

RL = 8

Ω

RL = 8

Ω

G = +1.5dB

G = +10.5dB

BW < 125kHz

Tamb = 25°C

1

0.1

1

0.1

Vcc=5V

Po=700mW

Vcc=5V

Po=700mW

Vcc=3.3V

Po=300mW

Vcc=3.3V

Po=300mW

Vcc=2.7V

Po=200mW

Vcc=2.7V

Po=200mW

0.01

20

100

1000

10000

20

100

1000

10000

Frequency (Hz)

Figure 24. THD+N vs. frequency

Figure 25. THD+N vs. frequency

10

Mode 1, 2 - SPK out

RL = 16

Ω

RL = 16

Ω

G = +10.5dB

G = +1.5dB

BW < 125kHz

Tamb = 25°C

1

0.1

1

Vcc=5V

Po=400mW

Vcc=5V

Po=400mW

Vcc=3.3V

Po=200mW

Vcc=3.3V

Po=200mW

Vcc=2.7V

Po=120mW

Vcc=2.7V

Po=120mW

0.1

0.01

20

100

1000

10000

20

100

1000

10000

Frequency (Hz)

Figure 26. THD+N vs. frequency

Figure 27. THD+N vs. frequency

10

Mode 3 - LHP, RHP

RL = 16

Ω

RL = 16Ω

G = +10.5dB

G = +1.5dB

BW < 125kHz

Tamb = 25

°

C

Tamb = 25°C

1

0.1

Vcc=3.3V

Po=15mW

Vcc=3.3V

Po=15mW

Vcc=2.7V

Po=15mW

Vcc=2.7V

Po=15mW

0.1

Vcc=5V

Po=15mW

10000

0.01

20

100

1000

Frequency (Hz)

10000

20

100

1000

Frequency (Hz)

18/51

TS4956

Electrical characteristics

Figure 28. THD+N vs. frequency

Figure 29. THD+N vs. frequency

10

Mode 3 - LHP, RHP

RL = 32

Ω

G = +1.5dB

G = +10.5dB

BW < 125kHz

Tamb = 25°C

1

0.1

1

Vcc=3.3V

Po=10mW

Vcc=3.3V

Po=10mW

Vcc=2.7V

Po=10mW

Vcc=2.7V

Po=10mW

0.1

0.01

Vcc=5V

Po=10mW

Vcc=5V

Po=10mW

0.01

20

100

1000

Frequency (Hz)

10000

20

100

1000

Frequency (Hz)

10000

Figure 30. THD+N vs. frequency

Figure 31. THD+N vs. frequency

10

Mode 4 - LHP, RHP

RL = 16

Ω

RL = 16

Ω

G = +10.5dB

BW < 125kHz

G = +1.5dB

BW < 125kHz

Tamb = 25°C

1

0.1

1

Vcc=5V

Po=15mW

Vcc=5V

Po=15mW

Vcc=3.3V

Po=15mW

Vcc=2.7V

Po=15mW

Vcc=3.3V

Po=15mW

Vcc=2.7V

Po=15mW

0.1

0.01

20

100

1000

10000

20

100

1000

10000

Frequency (Hz)

Figure 32. THD+N vs. frequency

Figure 33. THD+N vs. frequency

10

Mode 4 - LHP, RHP

RL = 32

Ω

RL = 32Ω

G = +1.5dB

G = +10.5dB

BW < 125kHz

Tamb = 25

°

C

Tamb = 25°C

1

0.1

Vcc=5V

Po=10mW

Vcc=3.3V

Po=10mW

Vcc=3.3V

Po=10mW

Vcc=2.7V

Po=10mW

Vcc=2.7V

Po=10mW

0.1

0.01

20

100

1000

10000

20

100

1000

10000

Frequency (Hz)

19/51

Electrical characteristics

TS4956

Figure 34. THD+N vs. frequency

Figure 35. THD+N vs. frequency

10

Mode 5, 6 - MLO

RL = 16

Ω

RL = 16

Ω

G = +1.5dB

BW < 125kHz

G = +10.5dB

BW < 125kHz

Tamb = 25°C

1

0.1

1

0.1

Vcc=5V

Po=100mW

Vcc=5V

Po=100mW

Vcc=3.3V

Po=50mW

Vcc=2.7V

Po=30mW

Vcc=3.3V

Po=50mW

Vcc=2.7V

Po=30mW

0.01

20

100

1000

Frequency (Hz)

10000

20

100

1000

10000

Frequency (Hz)

Figure 36. THD+N vs. frequency

Figure 37. THD+N vs. frequency

10

Mode 5, 6 - MLO

RL = 32

Ω

RL = 32

Ω

G = +10.5dB

BW < 125kHz

G = +1.5dB

BW < 125kHz

Tamb = 25°C

Vcc=5V

Po=60mW

Tamb = 25°C

1

0.1

1

Vcc=5V

Po=60mW

Vcc=3.3V

Po=30mW

Vcc=2.7V

Po=20mW

Vcc=3.3V

Po=30mW

Vcc=2.7V

Po=20mW

0.1

0.01

20

100

1000

10000

20

100

1000

10000

Frequency (Hz)

Figure 38. THD+N vs. frequency

Figure 39. THD+N vs. frequency

10

Mode 7 - BTL, SPK out

RL = 16

Ω

RL = 8

Ω

G = +10.5dB

BW < 125kHz

G = +10.5dB

BW < 125kHz

Tamb = 25°C

1

0.1

Vcc=5V

Po=700mW

Vcc=5V

Po=400mW

Vcc=3.3V

Po=300mW

Vcc=2.7V

Po=200mW

Vcc=3.3V

Po=200mW

Vcc=2.7V

Po=120mW

0.1

0.01

20

100

1000

10000

20

100

1000

10000

Frequency (Hz)

20/51

TS4956

Electrical characteristics

Figure 40. Output power vs. power supply

voltage

Figure 41. Output power vs. power supply

voltage

1400

1600

Mode 1, 2, 7

BTL, SPK out

F = 1kHz

BW < 125 kHz

Tamb = 25°C

1300

1200

1100

1000

900

800

700

600

500

400

300

200

100

0

Mode 1, 2, 7

1400

1200

1000

800

600

400

200

0

BTL, SPK out

F = 1kHz

BW < 125 kHz

RL=8

Ω

RL=8

Ω

Tamb = 25°C

RL=16

Ω

RL=16

Ω

RL=32

5.0

Ω

RL=32

5.0

Ω

2.5

3.0

3.5

4.0

Vcc (V)

4.5

5.5

2.5

3.0

3.5

4.0

Vcc (V)

4.5

5.5

Figure 42. Output power vs. power supply

voltage

Figure 43. Output power vs. power supply

voltage

70

50

RL=32Ω

RL=32

Ω

60

40

30

20

10

0

50

RL=16Ω

RL=16

Ω

40

30

Mode 3, 4

LHP, RHP

F = 1kHz

BW < 125 kHz

Mode 3, 4

LHP, RHP

F = 1kHz

BW < 125 kHz

Tamb = 25

20

RL=64Ω

RL=64

4.0

Ω

10

Tamb = 25°C

°C

0

2.5

3.0

3.5

4.0

4.5

5.0

5.5

2.5

3.0

3.5

4.5

5.0

5.5

Vcc (V)

Figure 44. Output power vs. power supply

voltage

Figure 45. Output power vs. power supply

voltage

200

280

Mode 5, 6

MLO

F = 1kHz

BW < 125 kHz

Mode 5, 6

MLO

180

240

200

160

120

80

F = 1kHz

BW < 125 kHz

160

RL=16

Ω

140

120

100

80

RL=16

Ω

Tamb = 25°C

RL=32

Ω

RL=32

Ω

60

40

20

RL=64

5.0

Ω

RL=64

5.0

Ω

0

2.5

3.0

3.5

4.0

Vcc (V)

4.5

5.5

2.5

3.0

3.5

4.0

4.5

5.5

Vcc (V)

21/51

Electrical characteristics

TS4956

Figure 46. Output power vs. load resistance

Figure 47. Output power vs. load resistance

1400

1600

Mode 1, 2, 7

1300

BTL, SPK out

1200

1400

1200

1000

800

600

400

200

0

BTL, SPK out

F = 1kHz

BW < 125 kHz

Vcc=5.5V

F = 1kHz

Vcc=5.5V

1100

1000

900

800

700

600

500

400

300

200

100

0

BW < 125 kHz

Tamb = 25

°

C

Tamb = 25°C

Vcc=5V

Vcc=3.3V

Vcc=2.7V

8

12

16

20

24

28

32

8

12

16

20

24

28

32

Load resistance (

Ω

)

Load resistance (

Ω

)

Figure 48. Output power vs. load resistance

Figure 49. Output power vs. load resistance

90

70

Mode 3, 4

LHP, RHP

F = 1kHz

Mode 3, 4

LHP, RHP

F = 1kHz

80

60

50

40

30

20

10

0

Vcc=5.5V

70

60

50

40

30

20

10

0

BW < 125 kHz

Tamb = 25°C

BW < 125 kHz

Tamb = 25°C

Vcc=5V

Vcc=3.3V

Vcc=2.7V

16 20 24 28 32 36 40 44 48 52 56 60 64

Load resistance (

Ω

)

Load resistance (

Ω

)

Figure 50. Output power vs. load resistance

Figure 51. Output power vs. load resistance

200

300

Mode 5, 6

MLO

F = 1kHz

BW < 125 kHz

Tamb = 25

Mode 5, 6

MLO

F = 1kHz

BW < 125 kHz

Tamb = 25°C

180

250

Vcc=5.5V

160

140

120

100

80

Vcc=5.5V

°

C

200

150

100

50

Vcc=5V

Vcc=3.3V

60

Vcc=2.7V

40

20

0

16

24

32

48

56

64

16

24

32

40

48

56

64

Load resistance (Ω)

22/51

TS4956

Electrical characteristics

Figure 52. PSRR vs. frequency

Figure 56. PSRR vs. frequency

0

Mode 1 - SPK out

Vcc = 2.7V

Mode 1 - SPK out

Vcc = 3.3V

G=+12dB, +10.5dB

G=+1.5dB

-20 RL

Inp. grounded

Vripple = 200mVpp

≥ 8Ω, Cb = 1µF

-20

RL

Inp. grounded

Vripple = 200mVpp

≥ 8Ω, Cb = 1µF

G=+12dB

G=+6dB

G=+10.5dB

G=+1.5dB

-40

G=+6dB

-60

G=-18dB

G=-9dB

-80

G=-9dB

G=-34.5dB

G=-18dB

G=-34.5dB

-100

20

100

1000

10000

20

100

1000

10000

Frequency (Hz)

Figure 53. PSRR vs. frequency

Figure 57. PSRR vs. frequency

0

Mode 1 - SPK out

Vcc = 5V

Mode 2 - SPK out

Vcc = 2.7V

-10

-20

-40

RL

Inp. grounded

Vripple = 200mVpp

≥

8

Ω, Cb = 1

µ

F

RL

≥ 8Ω, Cb = 1µF

G=+12dB

-20

Inp. grounded

G=+6dB

-30 Vripple = 200mVpp

G=+10.5dB

G=+1.5dB

-40

-50

-60

-70

G=+6dB

G=+12dB

-60

-80

G=-18dB

G=-9dB

10000

G=+1.5dB

-80

G=-18dB

1000

G=-9dB

G=-34.5dB

-100

-90

20

100

1000

10000

20

100

Frequency (Hz)

Figure 54. PSRR vs. frequency

Figure 58. PSRR vs. frequency

0

Mode 2 - SPK out

Vcc = 3.3V

Mode 2 - SPK out

Vcc = 5V

-10

RL

≥ 8Ω, Cb = 1µF

RL

≥ 8Ω, Cb = 1µF

-20

-30

-40

-50

-60

-70

-80

-90

-20

G=+12dB

Inp. grounded

Vripple = 200mVpp

Inp. grounded

G=+12dB, +10.5dB

G=+6dB

G=+10.5dB

-30 Vripple = 200mVpp

G=+6dB

-40

-50

-60

-70

G=+1.5dB

G=-9dB

10000

-80

G=-34.5dB

100

G=-9dB

10000

G=-18dB

G=-34.5dB

G=-18dB

1000

-90

20

1000

20

100

Frequency (Hz)

23/51

TS4956

Electrical characteristics

Figure 60. PSRR vs. frequency

Figure 63. PSRR vs. frequency

0

-10

-20

Mode 3 - LHP, RHP

Vcc = 2.7V

Mode 3 - LHP, RHP

Vcc = 3.3V

-10

RL

Inp. grounded

Vripple = 200mVpp

≥ 16Ω, Cb = 1µF

RL

≥ 16Ω, Cb = 1µF

-20

-30

-40

-50

-60

-70

-80

-90

Inp. grounded

-30 Vripple = 200mVpp

-40

G=+10.5dB

G=+12dB

G=+10.5dB

G=+12dB

G=+1.5dB

G=+6dB

G=+1.5dB

G=+6dB

-50

-60

-70

-80

-90

G=-34.5dB

10000

G=-18dB

10000

G=-9dB

G=-18dB

100

G=-34.5dB

20

1000

20

100

1000

Frequency (Hz)

Figure 61. PSRR vs. frequency

Figure 64. PSRR vs. frequency

0

Mode 3 - LHP, RHP

Vcc = 5V

Mode 4 - LHP, RHP

Vcc = 2.7V

-10

RL

≥ 16Ω, Cb = 1µF

-20

-30

-40

-50

-60

-70

-80

-90

-100

RL

Inp. grounded

Vripple = 200mVpp

≥ 16Ω, Cb = 1µF

-20

Inp. grounded

-30 Vripple = 200mVpp

G=+10.5dB

G=+1.5dB

-40

G=+12dB

G=+1.5dB

G=+6dB

G=+12dB

-50

G=+6dB

-60

-70

G=-9dB

-80

G=-34.5dB

1000

G=-18dB

G=-9dB

G=-18dB

-90

20

100

10000

20

100

1000

10000

Frequency (Hz)

Figure 62. PSRR vs. frequency

Figure 65. PSRR vs. frequency

0

Mode 4 - LHP, RHP

Vcc = 3.3V

Mode 4 - LHP, RHP

-10

Vcc = 5V

-20

-30

-40

-50

-60

-70

-80

-90

-100

RL

≥ 16Ω, Cb = 1µF

-20

-30

-40

-50

-60

-70

-80

-90

-100

RL

≥ 16Ω, Cb = 1µF

Inp. grounded

Vripple = 200mVpp

G=+1.5dB

Vripple = 200mVpp

G=+1.5dB

G=+10.5dB

G=+6dB

G=+10.5dB

G=+12dB

G=+6dB

G=-34.5dB

10000

G=-18dB

20

G=-34.5dB

10000

G=-18dB

G=-9dB

20

100

1000

Frequency (Hz)

100

1000

Frequency (Hz)

24/51

TS4956

Electrical characteristics

Figure 66. PSRR vs. frequency

Figure 69. PSRR vs. frequency

0

-10

-20

-30

-40

-50

-60

-70

-80

-90

-100

Mode 5 - MLO

Vcc = 2.7V

Mode 5 - MLO

Vcc = 3.3V

-10

-20

-30

-40

-50

-60

-70

-80

-90

-100

RL

Inp. grounded

Vripple = 200mVpp

≥ 16Ω, Cb = 1µF

RL

≥ 16Ω, Cb = 1µF

G=+12dB

G=+6dB

Inp. grounded

Vripple = 200mVpp

G=+10.5dB

G=+12dB G=+6dB

G=+1.5dB

G=-18dB

10000

G=-9dB

G=+1.5dB

G=-9dB

G=-18dB

G=-34.5dB

20

100

1000

10000

20

100

1000

Frequency (Hz)

Figure 67. PSRR vs. frequency

Figure 70. PSRR vs. frequency

0

Mode 5 - MLO

Vcc = 5V

Mode 6 - MLO

Vcc = 2.7V

-10

-20

-30

-40

-50

-60

-70

-80

-90

-100

RL

≥

16Ω, Cb = 1

µ

F

G=+12dB

G=+6dB

-20

-30

-40

-50

-60

-70

-80

-90

-100

RL

Inp. grounded

Vripple = 200mVpp

≥ 16Ω, Cb = 1µF

Inp. grounded

Vripple = 200mVpp

G=+10.5dB

G=-9dB

G=+12dB

G=+6dB

G=+1.5dB

G=-18dB

G=-34.5dB

G=+1.5dB

100

G=-18dB

G=-9dB

G=-34.5dB

10000

20

1000

20

100

1000

Frequency (Hz)

10000

Frequency (Hz)

Figure 68. PSRR vs. frequency

Figure 71. PSRR vs. frequency

0

Mode 6 - MLO

Vcc = 3.3V

Mode 6 - MLO

-10

Vcc = 5V

-20

-30

-40

-50

-60

-70

-80

-90

-100

RL

Inp. grounded

Vripple = 200mVpp

≥ 16Ω, Cb = 1µF

-20

-30

-40

-50

-60

-70

-80

-90

-100

RL

Inp. grounded

Vripple = 200mVpp

≥ 16Ω, Cb = 1µF

G=+12dB

G=+6dB

G=+12dB

G=+6dB

G=+1.5dB

G=+10.5dB

G=+1.5dB

G=-9dB

G=-34.5dB

G=-18dB

G=-9dB

G=-18dB

20

100

1000

Frequency (Hz)

10000

20

100

1000

10000

Frequency (Hz)

25/51

TS4956

Electrical characteristics

Figure 72. PSRR vs. frequency

Figure 75. PSRR vs. frequency

0

-10

-20

-30

-40

-50

-60

-70

-80

-90

-100

Mode 7 - BTL, SPK out

Vcc = 2.7V

Mode 7 - BTL, SPK out

Vcc = 3.3V

-10

RL

≥

8

Ω, Cb = 1

µF

-20

-30

-40

-50

-60

-70

-80

-90

-100

RL

≥ 8Ω, Cb = 1µF

Inp. grounded

Vripple = 200mVpp

Inp. grounded

G=+12dB

G=+6dB

Vripple = 200mVpp

G=+12dB

G=+6dB

G=+10.5dB

G=+1.5dB

G=-34.5dB

G=-9dB

100

G=-18dB

G=-9dB

100

G=-18dB

1000

20

1000

10000

20

10000

Frequency (Hz)

Figure 73. PSRR vs. frequency

Figure 76. CMRR vs. frequency

0

Mode 1 - SPK out

Vcc = 2.7V, 3.3V, 5V

Mode 7 - BTL, SPK out

-10

Vcc = 5V

-20

G=+12dB

G=+10.5dB

RL

Cin = 470

Vic = 200mVpp

≥ 8Ω, Cb = 1µF

RL

≥

8

Ω, Cb = 1

µ

F

-20

-40

µ

F

Inp. grounded

Vripple = 200mVpp

-30

-40

G=+10.5dB

G=+6dB

G=+12dB

G=+6dB

-50

G=+1.5dB

-60

-70

G=+1.5dB

G=-9dB

10000

-80

G=-9dB

10000

-90

G=-34.5dB

100

G=-18dB

1000

G=-34.5dB

100

-100

20

1000

Frequency (Hz)

Figure 74. CMRR vs. frequency

Figure 77. CMRR vs. frequency

0

Mode 3 - LHP, RHP

Vcc = 2.7V, 3.3V, 5V

Mode 5 - MLO

G=+12dB

Vcc = 2.7V, 3.3V, 5V

RL 16 , Cb = 1

Cin = 470

Vic = 200mVpp

RL

Cin = 470

Vic = 200mVpp

≥ 8Ω, Cb = 1µF

-20

-40

G=+12dB

G=+10.5dB

-20

-40

≥

Ω

µF

G=+10.5dB

G=+6dB

µ

F

µ

F

G=+6dB

-60

G=+1.5dB

G=-9dB

10000

-80

G=+1.5dB G=-9dB

G=-18dB

1000

Frequency (Hz)

G=-34.5dB

100

G=-34.5dB

10000

-100

100

1000

Frequency (Hz)

26/51

TS4956

Electrical characteristics

Figure 78. SNR vs. power supply voltage

Figure 81. SNR vs. power supply voltage

100

98

96

94

92

90

88

86

84

82

80

78

76

74

72

70

68

66

64

62

60

100

98

96

94

92

90

88

86

84

82

80

78

Weighted filter type A

Unweighted filter (20Hz to 20 kHz)

Mode 1, SPK out

Weighted filter type A

76

74

72

70

68

66

64

62

60

Unweighted filter (20Hz to 20 kHz)

Mode 1, SPK out

G = +10.5dB, RL = 8

THD+N < 0.5%

Ω

G = +1.5dB, RL = 8

THD+N < 0.5%

Ω

Tamb = 25

°

C

Tamb = 25

°C

2.7

3.3

Vcc (V)

5

2.7

3.3

Vcc (V)

5

Figure 79. SNR vs. power supply voltage

Figure 82. SNR vs. power supply voltage

100

98

96

94

92

90

88

86

84

82

80

78

76

74

72

70

68

66

64

62

60

100

98

96

94

92

90

88

86

84

82

80

78

76

74

72

70

68

66

64

62

60

Weighted filter type A

Unweighted filter (20Hz to 20 kHz)

Weighted filter type A

Unweighted filter (20Hz to 20 kHz)

Mode 1, SPK out

G = +1.5dB, RL = 16

THD+N < 0.5%

Mode 1, SPK out

G = +10.5dB, RL = 16

THD+N < 0.5%

Ω

Tamb = 25

°C

Tamb = 25

°C

2.7

3.3

Vcc (V)

5

2.7

3.3

Vcc (V)

5

Figure 80. SNR vs. power supply voltage

Figure 83. SNR vs. power supply voltage

100

98

96

94

92

90

88

86

84

82

80

78

76

74

72

70

68

66

64

62

60

100

98

96

94

92

90

88

86

84

82

80

78

76

74

72

70

68

66

64

62

60

Weighted filter type A

Unweighted filter (20Hz to 20kHz)

Mode 2, SPK out

Weighted filter type A

Unweighted filter (20Hz to 20kHz)

Mode 2, SPK out

G = +10.5dB, RL = 8

THD+N < 0.5%

G = +1.5dB, RL = 8

THD+N < 0.5%

Ω

Tamb = 25

°C

Tamb = 25

°C

2.7

3.3

Vcc (V)

5

2.7

3.3

Vcc (V)

5

27/51

TS4956

Electrical characteristics

Figure 84. SNR vs. power supply voltage

Figure 87. SNR vs. power supply voltage

100

98

96

94

92

90

88

86

84

82

80

78

100

98

96

94

92

90

88

86

84

82

80

78

Weighted filter type A

76

Weighted filter type A

76

74

72

74

72

Unweighted filter (20Hz to 20kHz)

Mode 2, SPK out

70

Mode 2, SPK out

70

G = +1.5dB, RL = 16

THD+N < 0.5%

Ω

G = +10.5dB, RL = 16

THD+N < 0.5%

Ω

68

66

64

62

60

68

66

64

62

60

Tamb = 25

°C

Tamb = 25

°C

2.7

3.3

Vcc (V)

5

2.7

3.3

5

Vcc (V)

Figure 85. SNR vs. power supply voltage

Figure 88. SNR vs. power supply voltage

100

98

96

94

92

90

88

86

84

82

80

78

76

74

72

70

68

66

64

62

60

90

88

86

84

82

80

78

76

74

72

70

68

66

64

62

60

58

56

54

52

50

Weighted filter type A

Unweighted filter (20Hz to 20kHz)

Weighted filter type A

Unweighted filter (20Hz to 20kHz)

Mode 3 - LHP, RHP

G = +1.5dB, RL = 16

THD+N < 0.5%

Mode 3 - LHP, RHP

G = +10.5dB, RL = 16

THD+N < 0.5%

Ω

Tamb = 25

°C

Tamb = 25

°C

2.7

3.3

Vcc (V)

5

2.7

3.3

5

Vcc (V)

Figure 86. SNR vs. power supply voltage

Figure 89. SNR vs. power supply voltage

100

98

96

94

92

90

88

86

84

82

80

78

76

74

72

70

68

66

64

62

60

90

88

86

84

82

80

78

76

74

72

70

68

66

64

62

60

58

56

54

52

50

Weighted filter type A

Unweighted filter (20Hz to 20kHz)

Weighted filter type A

Unweighted filter (20Hz to 20kHz)

Mode 3 - LHP, RHP

G = +1.5dB, RL = 32

THD+N < 0.5%

Mode 3 - LHP, RHP

G = +10.5dB, RL = 32

THD+N < 0.5%

Ω

Tamb = 25

°C

Tamb = 25

°C

2.7

3.3

Vcc (V)

5

2.7

3.3

5

Vcc (V)

28/51

TS4956

Electrical characteristics

Figure 90. SNR vs. power supply voltage

Figure 93. SNR vs. power supply voltage

100

98

96

94

92

90

88

86

84

82

80

78

76

74

72

70

68

66

64

62

60

90

88

86

84

82

80

78

76

74

72

70

68

Weighted filter type A

Unweighted filter (20Hz to 20kHz)

Weighted filter type A

66

64

62

60

58

56

54

52

50

Unweighted filter (20Hz to 20kHz)

Mode 4 - LHP, RHP

G = +10.5dB, RL = 16

THD+N < 0.5%

Mode 4 - LHP, RHP

G = +1.5dB, RL = 16

THD+N < 0.5%

Ω

Tamb = 25

°

C

Tamb = 25

°C

2.7

3.3

Vcc (V)

5

2.7

3.3

5

Vcc (V)

Figure 91. SNR vs. power supply voltage

Figure 94. SNR vs. power supply voltage

100

98

96

94

92

90

88

86

84

82

80

78

76

74

72

70

68

66

64

62

60

90

88

86

84

82

80

78

76

74

72

70

68

66

64

62

60

58

56

54

52

50

Weighted filter type A

Unweighted filter (20Hz to 20kHz)

Weighted filter type A

Unweighted filter (20Hz to 20kHz)

Mode 5 - MLO

G = +1.5dB, RL = 32

THD+N < 0.5%

Mode 4 - LHP, RHP

G = +10.5dB, RL = 32

THD+N < 0.5%

Ω

Tamb = 25

°C

Tamb = 25

°C

2.7

3.3

Vcc (V)

5

2.7

3.3

5

Vcc (V)

Figure 92. SNR vs. power supply voltage

Figure 95. SNR vs. power supply voltage

100

98

96

94

92

90

88

86

84

82

80

78

76

74

72

70

68

66

64

62

60

90

88

86

84

82

80

78

76

74

72

70

68

66

64

62

60

58

56

54

52

50

Weighted filter type A

Unweighted filter (20Hz to 20kHz)

Weighted filter type A

Unweighted filter (20Hz to 20kHz)

Mode 5 - MLO

G = +1.5dB, RL = 16

THD+N < 0.5%

Mode 5 - MLO

G = +10.5dB, RL = 16

THD+N < 0.5%

Ω

Tamb = 25

°C

Tamb = 25

°C

2.7

3.3

Vcc (V)

5

2.7

3.3

5

Vcc (V)

29/51

TS4956

Electrical characteristics

Figure 96. SNR vs. power supply voltage

Figure 99. SNR vs. power supply voltage

100

98

96

94

92

90

88

86

84

82

80

78

76

74

72

70

68

66

64

62

60

90

88

86

84

82

80

78

76

74

72

70

68

66

64

62

60

58

56

54

52

50

Weighted filter type A

Unweighted filter (20Hz to 20kHz)

Weighted filter type A

Unweighted filter (20Hz to 20kHz)

Mode 5 - MLO

G = +1.5dB, RL = 32

THD+N < 0.5%

Mode 5 - MLO

G = +10.5dB, RL = 32

THD+N < 0.5%

Ω

Tamb = 25

°C

Tamb = 25

°C

2.7

3.3

Vcc (V)

5

2.7

3.3

5

Vcc (V)

Figure 97. SNR vs. power supply voltage

Figure 100. SNR vs. power supply voltage

100

98

96

94

92

90

88

86

84

82

80

78

76

74

72

70

68

66

64

62

60

90

88

86

84

82

80

78

76

74

72

70

68

66

64

62

60

58

56

54

52

50

Weighted filter type A

Unweighted filter (20Hz to 20kHz)

Mode 6 - MLO

Weighted filter type A

Unweighted filter (20Hz to 20kHz)

Mode 6 - MLO

G = +10.5dB, RL = 16

THD+N < 0.5%

G = +1.5dB, RL = 16

THD+N < 0.5%

Ω

Tamb = 25

°C

Tamb = 25

°C

2.7

3.3

Vcc (V)

5

2.7

3.3

5

Vcc (V)

Figure 98. SNR vs. power supply voltage

Figure 101. SNR vs. power supply voltage

100

98

96

94

92

90

88

86

84

82

80

78

76

74

72

70

68

66

64

62

60

90

88

86

84

82

80

78

76

74

72

70

68

66

64

62

60

58

56

54

52

50

Weighted filter type A

Unweighted filter (20Hz to 20kHz)

Weighted filter type A

Unweighted filter (20Hz to 20kHz)

Mode 6 - MLO

G = +1.5dB, RL = 32

THD+N < 0.5%

Mode 6 - MLO

G = +10.5dB, RL = 32

THD+N < 0.5%

Ω

Tamb = 25

°C

Tamb = 25

°C

2.7

3.3

Vcc (V)

5

2.7

3.3

5

Vcc (V)

30/51

TS4956

Electrical characteristics

Figure 102. SNR vs. power supply voltage

Figure 105. SNR vs. power supply voltage

100

98

96

94

92

90

88

86

84

82

80

78

100

98

96

94

92

90

88

86

84

82

80

78

Weighted filter type A

76

Weighted filter type A

76

74

72

74

72

Unweighted filter (20Hz to 20kHz)

Mode 7 - BTL, SPKout

70

Mode 7 - BTL, SPKout

70

G = +10.5dB, RL = 8

THD+N < 0.5%

Ω

G = +10.5dB, RL = 16

THD+N < 0.5%

Ω

68

66

64

62

60

68

66

64

62

60

Tamb = 25

°C

Tamb = 25

°C

2.7

3.3

Vcc (V)

5

2.7

3.3

5

Vcc (V)

Figure 103. Current consumption vs. power

supply voltage

Figure 106. Standby current consumption vs.

power supply voltage

8

0.5

No loads

Mode7

No loads

Tamb = 25°C

7

6

5

4

3

2

1

0

Mode3

0.4

0.3

0.2

0.1

0.0

Mode4

Mode 1,2

Mode 5,6

1

0

1

2

3

4

5

6

0

2

3

4

5

Vcc (V)

Figure 107. Frequency response mode 3, 4

Figure 104. Frequency response mode 1, 2, 7

12

Mode 3, 4

LHP, RHP

Cin = 330nF

10

8

10

8

Mode 1, 2, 7

BTL, SPK out

Cin = 330nF

Tamb 25 °C

G=+12dB, RL=16Ω,32Ω

G=+12dB, RL=16Ω

G=+12dB, RL=8Ω

Tamb 25 °C

6

G=+6dB, RL=16Ω,32Ω

4

G=+6dB, RL=16Ω

G=+6dB, RL=8Ω

4

2

0

G=+1.5dB, RL=16Ω,32Ω

0

G=+1.5dB, RL=16Ω

G=+1.5dB, RL=8Ω

1000 10000

Frequency (Hz)

-2

100

1000

Frequency (Hz)

10000

100

31/51

TS4956

Electrical characteristics

Figure 108. Frequency response modes 5, 6

Figure 111. Frequency response modes 5, 6

12

10

G=+12dB, RL=32Ω

G=+12dB, RL=32

G=+12dB, RL=16

Ω

8

6

G=+12dB, RL=16Ω

Ω

6

4

2

4

2

0

G=+6dB, RL=32Ω

G=+6dB, RL=32

G=+6dB, RL=16

Ω

-2

-4

-6

-8

-10

G=+6dB, RL=16Ω

Ω

-4

Mode 5, 6 - MLO

Cin = 330nF

Cout = 470

Tamb 25

G=+1.5dB, RL=32Ω

G=+1.5dB, RL=32

G=+1.5dB, RL=16

Ω

Cin = 330nF

Cout = 220µF

Tamb 25 °C

-6

-8

µ

F

G=+1.5dB, RL=16Ω

Ω

°

C

-10

100

1000

Frequency (Hz)

10000

100

1000

Frequency (Hz)

10000

Figure 109. Power dissipation vs. output

power (per channel)

Figure 112. Power dissipation vs. output

power (per channel)

200

180

160

140

300

250

200

THD+N=1%

120

100

80

60

40

20

0

THD+N=1%

RL=8

Ω

RL=8

Ω

150

100

50

Mode 1, 2, 7

BTL, SPK out

Vcc = 2.7V

F = 1kHz

THD+N < 10%

Mode 1, 2, 7

BTL, SPK out

Vcc = 3.3V

F = 1kHz

THD+N < 10%

RL=16

Ω

RL=16

200

Ω

0

50

100

150 200 250 300 350 400

0

100

300

400

500

600

Output Power (mW)

Figure 110. Power dissipation vs. output

power (per channel)

Figure 113. Power dissipation vs. output

power (per channel)

700

650

600

550

500

900

800

700

600

450

400

THD+N=1%

RL=8

Ω

RL=8

Ω

500

400

300

200

100

0

350

300

250

200

150

100

50

Mode 1, 2, 7

BTL, SPK out

Vcc = 5.5V

Mode 1, 2, 7

BTL, SPK out

Vcc = 5V

F = 1kHz

THD+N < 10%

RL=16

Ω

RL=16

400

Ω

F = 1kHz

THD+N < 10%

0

200 400 600 800 1000 1200 1400 1600 1800

0

200

600

800

1000 1200 1400

Output Power (mW)

32/51

TS4956

Electrical characteristics

Figure 114. Power dissipation vs. output

power (per channel)

Figure 117. Power dissipation vs. output

power (per channel)

90

130

120

THD+N=1%

80

70

60

50

40

30

20

10

0

THD+N=1%

110

100

RL=16

Ω

90

80

70

60

50

40

30

20

10

0

RL=16

Ω

RL=32

Ω

RL=32

Ω

Mode 3, 4 - LHP, RHP

Vcc = 2.7V

F = 1kHz

Mode 3, 4 - LHP, RHP

Vcc = 3.3V

F = 1kHz

THD+N < 10%

0

10

20

30

40

50

0

10

20

30

40

50

60

Output Power (mW)

Figure 115. Power dissipation vs. output

power (per channel)

Figure 118. Power dissipation vs. output

power (per channel)

220

260

240

200

THD+N=1%

180

THD+N=1%

220

200

180

160

140

120

100

80

RL=16

Ω

160

140

120

100

80

RL=16

Ω

RL=32

Ω

RL=32

Ω

60

Mode 3, 4 - LHP, RHP

Vcc = 5V

Mode 3, 4 - LHP, RHP

Vcc = 5.5V

F = 1kHz

60

40

F = 1kHz

20

THD+N < 10%

0

10

20

30

40

50

60

70

0

10

20

30

40

50

60

70

Output Power (mW)

Figure 116. Power dissipation vs. output

power

Figure 119. Power dissipation vs. output

power

24

22

20

18

40

35

30

16

25

THD+N=1%

14

THD+N=1%

20

12

10

8

RL=16

Ω

RL=16

Ω

15

10

5

Mode 5, 6 - MLO

Vcc = 3.3V

F = 1kHz

Mode 5, 6 - MLO

6

Vcc = 2.7V

F = 1kHz

THD+N < 10%

RL=32

Ω

4

RL=32

Ω

2

THD+N < 10%

0

10 20 30 40 50 60 70 80 90 100

0

10

20

30

40

50

60

70

Output Power (mW)

33/51

TS4956

Electrical characteristics

Figure 120. Power dissipation vs. output

power

Figure 123. Power dissipation vs. output

power

90

80

70

60

100

90

80

70

THD+N=1%

60

THD+N=1%

50

RL=16

Ω

50

40

30

20

10

0

RL=16

Ω

40

30

20

10

0

Mode 5, 6 - MLO

Vcc = 5V

F = 1kHz

Mode 5, 6 - MLO

Vcc = 5.5V

F = 1kHz

RL=32

50

Ω

RL=32

Ω

THD+N < 10%

0

20 40 60 80 100 120 140 160 180 200 220 240

0

100

150

200

250

300

Output Power (mW)

Figure 121. Power derating curves

Figure 124. Crosstalk vs. frequency

1.6

1.4

0

Vcc = 5V, 3.3V, 2.7V

Mode 4

LHP -> RHP

-10

Heat sink surface = 125mm²

1.2

1.0

0.8

0.6

0.4

0.2

0.0

-20

-30

-40

-50

-60

-70

-80

RHP -> LHP

Tamb = 25

°

C

RL=32

Po=10mW

Ω

RL=16

Po=15mW

Ω

No Heat sink

25

100

1000

Frequency (Hz)

10000

0

50

75

100

C)

125

150

Ambiant Temperature (

°

Figure 122. Crosstalk vs. frequency

0

Mode 4

-10

RL = 8

Ω

BTL out -> SPK out

SPK out -> BTL out

Tamb = 25°C

-20

-30

-40

-50

-60

-70

-80

-90

-100

Vcc=5V

Po=700mW

Vcc=3.3V

Po=300mW

Vcc=2.7V

Po=200mW

100

1000

10000

Frequency (Hz)

34/51

TS4956

Application information

4

Application information

The TS4956 integrates 4 monolithic power amplifiers and has one differential input and two

single-ended inputs. The output amplifiers can be configured in 7 different modes as one SE

(single-ended) capacitively-coupled output, two phantom ground headphone outputs and

two BTL outputs. Figure 1 on page 3 and Figure 2 on page 4 shows schemes of these

configurations and Table 7 on page 6 describes these configurations in different modes.

This chapter gives information on how to configure the TS4956 in application.

4.1

Output configurations

4.1.1

Shutdown

When the device is in shutdown mode, all of the device’s outputs are in a high impedance

state.

4.1.2

Single-ended output configuration (modes 5 and 6)

When the device is woken-up via the I²C interface, output amplifier on output MLO is biased

to the V /2 voltage. In this configuration an output capacitor, C , on the single-ended

CC

out

output is needed to block the V /2 voltage and couples the audio signal to the load.

CC

V

/2 voltage is present on this output in all modes (modes 1 to 7) to keep the output

CC

capacitor C charged and to improve pop performance on this output during the switching

out

between any given mode to Mode 5 or 6.

When the device is in Mode 5 or 6 where the single-ended output MLO is active, all other

outputs are in a high impedance state.

4.1.3

Phantom ground output configuration (modes 3 and 4)

In a phantom ground output configuration (modes 3 and 4) the internal buffer is connected

to PHG pin and biased to the V /2 voltage. Output amplifiers (pins LHP and RHP) are also

CC

biased to the V /2 voltage. One end of the load is connected to output amplifier and one to

CC

the PHG buffer. Therefore, no output capacitors are needed. The advantage of the PHG

output configuration is fewer external components compared with a SE configuration.

However, note that in this configuration, the device has higher power dissipation (see

Section 4.3: Power dissipation and efficiency on page 37).

All other inactive outputs are in the high impedance state except for the MLO output, which

is biased to V /2 voltage.

CC

To achieve better crosstalk results in this case, each speaker should be connected with

separate PHG wire (2 speakers connected with 4 wires) as shown in Figure 1 on page 3

(instead of using only one common PHG wire for both speakers, i.e. 2 speakers connected

with 3 wires).

35/51

TS4956

Application information

4.1.4

BTL output configuration (modes 1, 2, 7)

In a BTL (Bridge Tied Load) output configuration (modes 1, 2 and 4), active outputs are

biased to the V /2 voltage. All other inactive outputs are in the high impedance state

CC

except for the MLO output, which is biased to V /2 voltage.

CC

BTL means that each end of the load is connected to two single-ended output amplifiers.

Therefore we have:

single-ended output 1 = V

single-ended output 2 = V

= V (V)

out

out1

out2

= -V (V)

out

and

V

- V

= 2V (V)

out1

out2 out

For the same power supply voltage, the output voltage amplitude is 2 times higher than the

output voltage in the single-ended or phantom ground configurations and the output power

is 4 times higher than the output power in the single-ended or phantom ground

configurations.

4.2

Power limitation in the phantom ground configuration

A power limitation is imposed on the headphones in mode 3 and 4. Limitation of output

power is achieved by limiting the output voltage and output current on each amplifier.

The maximum value of the output voltage, V

, is set to a value of 1.65V in order to

out max

reach a maximum output power of the sinusoidal signal of around 40mW per channel with a

32Ω load resistance and THD+N<1%.

The maximum value of output current I

is set to value 70mA in order to reach a

out max

maximum output power of the sinusoidal signal of around 40mW per channel with a 16Ω

load resistance and THD+N<1%.

The maximum output power with these voltage and current limitations is reached with load

values more than 16Ω and less than 32Ω as explained by Figure 125.

Figure 48 shows the functionality of the power limitation with different load resistances.

Figure 125. Voltage and current limitation on headphones

RL=32 Ohms

Vout

RL=24 Ohms

Vpeak_MAX=1.65V

RL=16 Ohms

Ipeak_MAX=70mA Iout

36/51

TS4956

Application information

4.3

Power dissipation and efficiency

Hypotheses:

●

Voltage and current in the load are sinusoidal (V and I ).

out out

Supply voltage is a pure DC source (V ).

CC

Regarding the load we have:

and

V_out= V_PEAKsinωt(V)

V_out

I_out= ----------(A)

R_L

and

V²_PEAK

P_out= ----------------- (A )

2R_L

4.3.1

Single-ended output configuration (modes 5 and 6)

The average current delivered by the supply voltage is:

^πV_PEAK

V_PEAK

1

2π

Icc_AVG= ------ ----------------- sin(t )dt = ----------------- (A )

∫

R_L

πR_L

0

Figure 126. Current delivered by supply voltage in the single-ended output configuration

The power delivered by supply voltage is:

P_supply= V_{CC CC}

I

(W)

AVG

So, the power dissipation by single-ended amplifier is

P_diss= P_supply–P_out(W)

2V_CC

P_diss= ------------------ P_out– P_out(W)

π R_L

and the maximum value is obtained when:

∂P_diss

= 0

∂P_out

37/51

TS4956

Application information

and its value is:

V²_CC

π²R_L

P_diss

= ------------- (W )

MAX

Note:

This maximum value depends only on power supply voltage and load values.

The efficiency is the ratio between the output power and the power supply:

P_outπV_PEAK

η = ------------------ = --------------------

P_supply2V_CC

The maximum theoretical value is reached when V

= V /2, so

CC

PEAK

π

η = -- = 78.5%

4

4.3.2

Phantom ground output configuration (modes 3, 4):

The average current delivered by the supply voltage is:

^πV_PEAK

2V_PEAK

1

π

Icc_AVG= -- ----------------- sin(t )dt = --------------------(A)

∫

R_L

πR_L

0

Figure 127. Current delivered by supply voltage in the phantom ground output

configuration

The power delivered by supply voltage is:

P_supply= V_{CC CC}

I

(W)

AVG

Then, the power dissipation by each amplifier is

⎛

⎜

⎝

⎞

2 2V_CC

P_diss

=

---------------------- P

– P_out(W)

⎟

⎠

out

π R_L

and the maximum value is obtained when:

∂P_diss

= 0

∂P_out

and its value is:

2V²_CC

P_diss

= --------------(W)

π²R_L

MAX

Note:

This maximum value depends only on the power supply voltage and load values.

38/51

TS4956

Application information

The efficiency is the ratio between the output power and the power supply:

P_outπV_PEAK

η = ------------------ = --------------------

P_supply4V_CC

The maximum theoretical value is reached when V

= V /2, so

CC

PEAK

π

η = -- = 39.25%

8

The TS4956 has in modes 3 and 4 two active output power amplifiers. Each amplifier

produces heat due to its power dissipation. Therefore the maximum die temperature is the

sum of each amplifier’s maximum power dissipation. It is calculated as follows:

P

= power dissipation due to the first power amplifier.

= power dissipation due to the second power amplifier.

diss 1

diss 2

Total P

= P

+ P

(W)

diss 2

diss

diss 1

In most cases, P

= P

, giving:

diss 2

diss 1

TotalP_diss= 2P_diss1

4 2V_CC

TotalP_diss= ---------------------- P _out– 2P_out(W)

π R_L

4.3.3

BTL output configuration (modes 1, 2, 7):

The average current delivered by the supply voltage is:

^πV_PEAK

2V_PEAK

1

π

Icc_AVG= -- ----------------- sin(t )dt = --------------------(A)

∫

R_L

πR_L

0

Figure 128. Current delivered by supply voltage in the BTL output configuration

The power delivered by supply voltage is:

P_supply= V_{CC CC}

I

(W)

AVG

Then, the power dissipation by each amplifier is

2 2V_CC

P_diss= ---------------------- P _out– P_out(W)

π R_L

39/51

TS4956

Application information

and the maximum value is obtained when:

∂P_diss

= 0

∂P_out

and its value is:

2V²_CC

P_diss

= --------------(W)

π²R_L

MAX

Note:

This maximum value depends only on power supply voltage and load values.

The efficiency is the ratio between the output power and the power supply:

P_out

πV_PEAK

4V_CC

η = ------------------ = --------------------

P_supply

The maximum theoretical value is reached when V

= V , so

PEAK

CC

π

η = -- = 78.5%

4

The TS4956 has one active output BTL power amplifier when in modes 1 and 2. In mode 7,

the TS49656 has two active output BTL power amplifiers.

Each amplifier produces heat due to its power dissipation. Therefore the maximum die

temperature is the sum of each amplifier’s maximum power dissipation. It is calculated as

follows:

●

P

= power dissipation due to the first BTL power amplifier.

= power dissipation due to the second BTL power amplifier.

diss 1

diss 2

Total P

= P

+ P

(W)

diss 2

diss

diss 1

In most cases, P

= P

, giving:

diss 2

diss 1

TotalP_diss= 2P_diss1

4 2V_CC

TotalP_diss= ---------------------- P _out– 2P_out(W)

π R_L

40/51

TS4956

Application information

4.4

Low frequency response

4.4.1

Input capacitor C

in

The input coupling capacitor blocks the DC part of the input signal at the amplifier input. In

the low-frequency region, C starts to have an effect. C with Z forms a first-order, high-

in

pass filter with -3 dB cut-off frequency.

1

-----------------------

F_CL

=

(Hz)

2πZ_inC_in

Z is the input impedance of the corresponding input.

in

Note:

For all inputs, the impedance value remains constant for all gain settings. This means that

the lower cut-off frequency doesn’t change with the gain setting. Note also that 30 kΩ is a

typical value and there is tolerance around this value. Using Figure 129 you can easily

establish the C value required for a -3dB cut-off frequency.

in

Figure 129. 3dB lower cut off frequency vs. input capacitance

100

All gain setting

Tamb=25°C

Minimum Input

Impedance

Typical Input

Impedance

10

Maximum Input

Impedance

0.1

1

Input Capacitor Cin (µF)

4.4.2

Output capacitor C

out

In the single-ended configuration an external output coupling capacitor, C , is needed.

out

This coupling capacitor C , together with the output load R , forms a first-order high-pass

out

L

filter with -3 dB cut off frequency.

1

F_CL= -------------------------- (H z )

2πR_LC_out

See Figure 130 to establish the C value for a -3dB cut-off frequency required.

out

These two first-order filters form a second-order high-pass filter. The -3 dB cut-off frequency

of these two filters should be the same, so the following formula should be respected:

1

----------------------- --------------------------

≅

2πZ_inC_in2πR_LC_out

41/51

TS4956

Application information

Figure 130. 3dB lower cut off frequency vs. output capacitance

100

10

1

All gain setting

Tamb = 25

°

C

RL=16

Ω

RL=32

Ω

100

1000

F)

Output capacitor Cout (

µ

4.5

Single-ended input configuration in modes 1, 3 and 5

It is possible to use the differential inputs MIP and MIN of the TS4956 as one single-ended

input in modes where the differential inputs are active (modes 1, 3 and 5).

The schematic in Figure 131 shows this configuration.

Figure 131. Single-ended input in modes 1, 3 and 5 for a typical application

Vcc

A

B

C

D

E

F

A

B

C

D

E

F

Cs1

1µF

Cs2

100nF

TS4956

LHPAmplifier

PHGAmplifier

RHP Amplifier

MODE3: GxMIP

Cin1

Stereo

A1 MIP

LHP

PHG

RHP

B6

A7

16/32 Ohms

+

Input Left

330nF

Cin2

Stereo

A2 MIN

+

Input Right

330nF

Mode

D6

B2

D2

E7

Select

LIN

RIN

Stereo

Speaker Amplifier

SRP+

B4

A5

MODE1: GxMIP

8 Ohms

Input Left

SRN-

MLO Amplifier

Stereo

MODE5: GxMIP

Input Right

Cout

+

MLO

220µF

R1

1k

16/32 Ohms

Digital volume

control

Bias

I2C

BYPASS

I2CVCC

Cb

I2CVCC

SCL

1µF

SDA

I2CBUS

42/51

TS4956

Application information

4.6

Decoupling of the circuit

Two capacitors are needed to properly bypass the TS4956 — a power supply capacitor C

s

and a bias voltage bypass capacitor C .

b

C has a strong influence on the THD+N at high frequencies (above 7 kHz) and indirectly on

s

the power supply disturbances.

With a C value of about 1 µF, you can expect to obtain THD+N performances similar to

s

those shown in the datasheet.

If C is lower than 1 µF, THD+N increases in high frequency and disturbances on power

s

supply rail are less filtered.

On the contrary, if C is higher than 1 µF, disturbances on the power supply rail are more

s

filtered.

C has an influence on THD+N at lower frequencies, but its value has critical impact on the

b

final result of PSRR with inputs grounded at lower frequencies:

●

If C is lower than 1 µF, THD+N increases at lower frequencies and the PSRR

b

worsens upwards.

●

If C is higher than 1 µF, the benefit on THD+N and PSRR in the lower

b

frequency range is small.

The value of C also has an influence on startup time.

b

4.7

Power On Reset

When power is applied to V , an internal Power On Reset holds the TS4956 in a reset

CC

state (shutdown) until the supply voltage reaches its nominal value. The Power On Reset

has a typical threshold of 1.75 V.

During this reset state the output configuration is the same as in the shutdown mode.

43/51

TS4956

Application information

4.8

Notes on PSRR measurements

4.8.1

What is PSRR?

The PSRR is the Power Supply Rejection Ratio. The PSRR of a device is the ratio between

a power supply disturbance and the result on the output. In other words, the PSRR is the

ability of a device to minimize the impact of power supply disturbance to the output.

4.8.2

How we measure the PSRR?

The PSRR was measured with the TS4956 in the configuration shown in the schematic in

Figure 132

Figure 132. Configuration schematic of TS4956 for PSRR measurement

A

B

C

D

E

F

A

B

C

D

E

F

Vripple

Vcc

TS4956

Diff. input +

Cin1

LHPAmplifier

PHG Amplifier

RHP Amplifier

10 Ohms

Stereo

A1 MIP

LHP

PHG

RHP

B6

A7

MODE7

+

Input Left

330nF

RL

16 Ohms

Cin2

Stereo

A2 MIN

RL

8Ohms

+

Input Right

330nF

10 Ohms

RL

16 Ohms

Diff. input -

Mode

Select

SE input left

Cin3

D6

B2

D2

E7

LIN

RIN

Stereo

Speaker Amplifier

SRP+

B4

A5

+

330nF

Input Left

RL

8Ohms

SRN-

MLO Amplifier

Stereo

Cin4

Input Right

+

Cout

+

330nF

MLO

SE inputright

220µF

RL

16 Ohms

Digital volume

control

Bias

I2C

BYPASS

I2CVCC

Cb

I2CVCC

SCL

1µF

SDA

I2CBUS

Main operating principles of TS4956 for purposes of PSRR measurement:

●

The DC voltage supply (V ) is fixed

CC

The AC sinusoidal ripple voltage (V

) is fixed

ripple

No bypass capacitor C is used

s

The PSRR value for each frequency is calculated as:

RMS_(Output)

PSRR = 20Log

(dB)

----------------------------------

RMS_(Vripple)

RMS is a rms selective measurement.

44/51

TS4956

Application information

4.9

Pop and click performance

The TS4956 has internal pop and click reduction circuitry which eliminates the output

transients, such as for example during switch-on or switch-off phases, or during a switch

from one output mode to another, or when changing the volume. The performance of this

circuitry is closely linked to the values of the input capacitor C , the output capacitor C

in

out

(for single-ended configuration) and the bias voltage bypass capacitor C .

b

The values of C and C are determined by the lower cut-off frequency value requested.

in

out

The value of C will affect the THD+N and PSRR values in lower frequencies.

b

The TS4956 is optimized to have low pop and click in the typical schematic configurations

(see Figure 1 on page 3 and Figure 2 on page 4).

4.10

Thermal shutdown

The TS4956 device has internal thermal shutdown protection in the event of extreme

temperatures. Thermal shutdown is active when the device reaches temperature 150°C.

45/51

TS4956

Application information

4.11

Evaluation board

An evaluation board for the TS4956 is available.

For more information about this evaluation board, please refer to the Application Note,

which can be found on www.st.com.

Figure 133. Schematic of the evaluation board available for the TS4956Figure 133.

I2CVCC

Vcc

Cn5

Cn2

Cn1

3

2

1

TS4956 POWER SUPPLY

I2CSUPPLY

Cs1

1µF

Cs2

100nF

TS4956

Diff. input +

JP1

LHP Amplifier

PHG Amplifier

RHPAmplifier

Cin1

Stereo

Input Left

7

5

MIP

LHP

PHG

RHP

1

2

+

4

3

2

1

330nF

PHONEJACK STEREO

1

JP6

Cin2

2

3

1

2

3

Stereo

Input Right

MIN

+

J2

Diff. input -

330nF

Mode

Select

15

6

SE input left

Cin3

LIN

Stereo

Input Left

Speaker Amplifier

SRP+

4

1

2

JP4

+

330nF

1

2

JP2

Cin4

10

16

SRN-

MLOAmplifier

Stereo

Input Right

RIN

3

1

2

+

C2

+

330nF

JP5

JP3

MLO

1

2

SE input right

220µF

R7

1K

Digital volume

control

Bias

I2C

BYPASS

I2CVCC

C1

1µF

I2CVCC

Cn3

Cn4

I2CVCC I2CVCC

R5

10K

R6

10K

I2CVCC

SCL

SDA

SCL SDA

SCL

SDA

I2C BUS

R4

180R

SDA

1A

16

15

1

2

T1

BS170

KP1040

GND2

J1

5

9

4

8

3

7

2

6

1

GND

DTR

TXD

RTS

D1

1B

R2

1K

3

14

DSR

1N4148

4

13

KP1040

DB9

R1

2k2

GND2

D2

1C

R3

5

6

12

11

1K

1N4148

KP1040

GND2

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TS4956

Package mechanical data

5

Package mechanical data

®

In order to meet environmental requirements, ST offers these devices in ECOPACK

packages. These packages have a Lead-free second level interconnect. The category of

second level interconnect is marked on the package and on the inner box label, in

compliance with JEDEC Standard JESD97. The maximum ratings related to soldering

conditions are also marked on the inner box label. ECOPACK is an ST trademark.

ECOPACK specifications are available at: www.st.com.

5.1

18-bump flip-chip package

2500 µm

Die size: 2.5x2.4 mm 30µm

Die height (including bumps): 600µm

Bumps diameter: 315µm 50µm

Bump diameter before reflow: 300µm 10µm

Bumps height: 250µm 40µm

Die height: 350µm 20µm

Pitch: 500µm 50µm

2400 µm

Coplanarity: 50µm max

750µm

500µm

866µm

600 µm

Figure 134. Footprint recommendations

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TS4956

Package mechanical data

Figure 135. Pin out (top view)

Figure 136. Marking (top view)

E

7

PGH

MLO

GND

LRHHPP-

RLHHPP+

6

5

56 X

YWW

VCC

SDA

RIN

BYPASS

SRN-

LIN

4

3

I2CVCC

MIN

MIP

A

Markings are:

– ST logo

SRP+

2

1

GND

SCL

– First two letters give part number code:56

– Third letter gives assembly plant code: X

– Three digit date code: YWW

B

C

D

E

– Lead-free EcoPack symbol: E

– The dot marks pin A1

Figure 137. Tape & reel schematic (top view)

1.5

4

1

A

8

Die size X + 70µm

4

All dimensions are in mm

User direction of feed

Device orientation

The devices are oriented in the carrier pocket with pin number 1A adjacent to the sprocket

holes.

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TS4956

Package mechanical data

5.2

Daisy chain sample

The daisy chain sample features pins connected two by two. The schematic in Figure 138

illustrates the way that the pins are connected to each other. This sample is used for testing

continuity on board. Your PCB needs to be designed the opposite way, so that pins that are

unconnected in the daisy chain sample, are connected on your PCB. If you do this, by

simply connecting a Ohmmeter between pin A1 and pin A3, the soldering process continuity

can be tested.

Figure 138. Top view of daisy chain sample

2.5 mm

7

6

5

2.2 mm

4

3

2

1

A

B

C

D

E

Table 14.

Order code for daisy chain sample

Part Number

Temperature Range

Package

Marking

TSDC02JT

-40, +85°C

Flip-Chip18

DC2

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TS4956

Revision history

6

Revision history

Table 15.

Date

Document revision history

Revision

Changes

Nov. 2005

1

2

3

First release corresponding to the preliminary data version.

cancellation the back coating sale type.

Final datasheet.

Dec. 2005

May 2006

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TS4956

Please Read Carefully:

Information in this document is provided solely in connection with ST products. STMicroelectronics NV and its subsidiaries (“ST”) reserve the

right to make changes, corrections, modifications or improvements, to this document, and the products and services described herein at any

time, without notice.

All ST products are sold pursuant to ST’s terms and conditions of sale.

Purchasers are solely responsible for the choice, selection and use of the ST products and services described herein, and ST assumes no

liability whatsoever relating to the choice, selection or use of the ST products and services described herein.

No license, express or implied, by estoppel or otherwise, to any intellectual property rights is granted under this document. If any part of this

document refers to any third party products or services it shall not be deemed a license grant by ST for the use of such third party products

or services, or any intellectual property contained therein or considered as a warranty covering the use in any manner whatsoever of such

third party products or services or any intellectual property contained therein.

UNLESS OTHERWISE SET FORTH IN ST’S TERMS AND CONDITIONS OF SALE ST DISCLAIMS ANY EXPRESS OR IMPLIED

WARRANTY WITH RESPECT TO THE USE AND/OR SALE OF ST PRODUCTS INCLUDING WITHOUT LIMITATION IMPLIED

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OF ANY JURISDICTION), OR INFRINGEMENT OF ANY PATENT, COPYRIGHT OR OTHER INTELLECTUAL PROPERTY RIGHT.

UNLESS EXPRESSLY APPROVED IN WRITING BY AN AUTHORIZE REPRESENTATIVE OF ST, ST PRODUCTS ARE NOT DESIGNED,

AUTHORIZED OR WARRANTED FOR USE IN MILITARY, AIR CRAFT, SPACE, LIFE SAVING, OR LIFE SUSTAINING APPLICATIONS,

NOR IN PRODUCTS OR SYSTEMS, WHERE FAILURE OR MALFUNCTION MAY RESULT IN PERSONAL INJURY, DEATH, OR

SEVERE PROPERTY OR ENVIRONMENTAL DAMAGE.

Resale of ST products with provisions different from the statements and/or technical features set forth in this document shall immediately void

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51/51


型号：	TS4956
厂家：	ST
描述：	Stereo audio amplifier system with I2C bus interface 立体声音频放大器系统的I2C总线接口音频放大器
文件：	总51页 (文件大小：1626K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

TS4956 [STMICROELECTRONICS]

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