TS4999 [STMICROELECTRONICS]
Filter-free stereo 2.8 W class D audio power amplifier with selectable 3D sound effects; 无滤波器立体声2.8胜类音频功率放大器，具有可选的3D音效
| 型号： | TS4999 |
| 厂家： | 
ST |
| 描述： | Filter-free stereo 2.8 W class D audio power amplifier with selectable 3D sound effects |
| 文件： | 总36页 (文件大小：718K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
TS4999
Filter-free stereo 2.8 W class D audio power amplifier
with selectable 3D sound effects
Features
Flip chip 18-bump package
■ Operates from V = 2.4 to 5.5 V
CC
■ Dedicated standby mode active low/channel
■ Output power per channel: 2.8 W at 5 V into
4 Ωwith 10% THD+N or 0.7 W at 3.6 V into 8 Ω
with 1% THD+N max.
■ Selectable 3D sound effect
■ Four gain setting steps: 3.5, 6, 9.5 and 12 dB
■ Low current consumption
Pin connections (top view)
■ PSSR: 63 dB typical at 217 Hz.
■ Fast start up phase: 7.8 ms
■ Short-circuit and thermal shutdown protection
■ Flip chip 18-bump lead-free package
LOUT-
ROUT-
PGND
LPVCC
RPVCC
LOUT+
G1
G0
ROUT+
Applications
AVCC
RIN-
AGND
LIN-
■ Cellular phones
STDBYR
■
PDAs
STDBYL
LIN+
■ Notebook PCs
3D
RIN+
Description
The TS4999 is a stereo fully-differential class D
power amplifier. It can drive up to 1.35 W into a
8 Ω load at 5 V per channel. The device has four
different gain settings utilizing two discrete pins,
G0 and G1.
Pop and click reduction circuitry provides low
on/off switch noise while allowing the device to
start within 8 ms. 3D enhancement effects are
selected through one digital input pin that allows
more amazing stereo audio sound.
Two standby pins (active low) allow each channel
to be switched off separately.
The TS4999 is available in a flip chip, 18-bump,
lead-free package.
December 2008
Rev 1
1/36
www.st.com
36
Contents
TS4999
Contents
1
2
3
Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Application information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
3.1
Electrical characteristic curves . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
4
Application information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
4.1
4.2
4.3
4.4
4.5
4.6
4.7
4.8
4.9
Differential configuration principle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Gain settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
3D effect enhancement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Low frequency response . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Circuit decoupling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Wakeup (tWU) and shutdown (tSTBY) times . . . . . . . . . . . . . . . . . . . . . . . 26
Consumption in shutdown mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Single-ended input configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Output filter considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
4.10 Short-circuit protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
4.11 Thermal shutdown . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
5
Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
5.1
5.2
Flip chip package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Tape and reel package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
6
7
Ordering information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
2/36
TS4999
Absolute maximum ratings
1
Absolute maximum ratings
Table 1.
Symbol
Key parameters and their absolute maximum ratings
Parameter
Value
Unit
Supply voltage(1)
Input voltage(2)
VCC
Vin
6
V
V
GND to VCC
-40 to + 85
-65 to +150
150
Toper
Tstg
Tj
Operating free air temperature range
Storage temperature
°C
°C
Maximum junction temperature
°C
Thermal resistance junction to ambient (3)
Power dissipation
Rthja
200
°C/W
Internally Limited(4)
2
Pd
HBM: human body model(5)
MM: machine model(6)
ESD
ESD
kV
200
200
V
mA
V
Latch-up Latch-up immunity
VSTBY
GND to VCC
Standby pin voltage maximum voltage
Lead temperature (soldering, 10 secs)
260
°C
Output short-circuit protection(7)
1. All voltages values are measured with respect to the ground pin.
2. The magnitude of input signal must never exceed VCC + 0.3 V / GND - 0.3 V
3. Device is protected in case of over temperature by a thermal shutdown active at 150° C.
4. Exceeding the power derating curves during a long period, involves abnormal operating condition.
5. Human body model: 100 pF discharged through a 1.5 kΩ resistor between two pins of the device, done for
all couples of pin combinations with other pins floating.
6. Machine model: a 200 pF capacitor is charged to the specified voltage, then discharged directly between
two pins of the device with no external series resistor (internal resistor < 5 Ω), done for all couples of pin
combinations with other pins floating.
7. Implemented short-circuit protection protects the amplifier against damage by short-circuit between
positive and negative outputs of each channel and between outputs and ground.
3/36
Absolute maximum ratings
TS4999
Table 2.
Symbol
Operating conditions
Parameter
Value
Unit
VCC
Vin
Supply voltage(1)
2.4 to 5.5
V
Input voltage range
GND to VCC
Standby voltage input(2)
VSTBY
V
Device ON
Device OFF
1.4 ≤VSTBY ≤VCC
GND ≤VSTBY ≤0.4(3)
RL
VIH
VIL
Load resistor
≥4
Ω
V
G0, G1, 3D, High Level Input Voltage(4)
G0, G1, 3D, Low Level Input Voltage
Thermal Resistance Junction to Ambient (5)
1.4 ≤VIH ≤VCC
GND ≤VIL ≤0.4
90
V
Rthja
°C/W
1. For VCC from 2.4 to 2.5 V, the operating temperature range is reduced to 0° C ≤Tamb ≤70° C
2. Without any signal on VSTBY, the device will be in standby (internal 300 kΩ (+/-20 %) pull down resistor)
3. Minimum current consumption is obtained when VSTBY = GND
4. Between G0, G1, 3D pins and GND, there is an internal 300 kΩ (+/-20 %) pull-down resistor. When pins
are floating, the gain is 3.5 dB and 3D effect is off. In full standby (left and right channels OFF), these
resistors are disconnected (HiZ input).
5. With a 4-layer PCB.
Table 3.
3D
3D effect pin and STANDBY pins setting truth table
STBYL
STBYR
3D Effect
Left channel Right channel
0
0
0
0
1
1
1
1
0
0
1
1
0
0
1
1
0
1
0
1
0
1
0
1
X
STDBY
STDBY
ON
STDBY
ON
OFF
OFF
OFF
X
STDBY
ON
ON
STDBY
N/A
STDBY
N/A
N/A
N/A
ON
N/A
N/A
ON
ON
Note:
When the 3D effect is switched on, both channels must be in operation or in shutdown mode
at the same time.
4/36
TS4999
Application information
2
Application information
Figure 1.
Typical application schematic
Cs
0.1uF
CsR
1uF
CsL
VCC
VCC
VCC
1uF
Gain Select
Control
3D Effect
Control
Differential
Left Input
TS4999
AVCC
RPVCC
LPVCC
Left IN+
Cin
Cin
A1 Lin+
B2 Lin-
Lout+ A5
H
Gain
PWM
Select
Lout- A7
Bridge
Left IN-
Left speaker
C3 G0
C5 G1
Oscillator
PWM
Differential
Right Input
E1 Rin+
D2 Rin-
Rout+ E5
H
Right IN+
Gain
Cin
Cin
Select
Rout- E7
Bridge
Right speaker
Right IN-
A3 STBYL
E3 STBYR
Standby
Control
Protection
Circuit
AGND
PGND
Standby Control
Note:
See Section 4.9: Output filter considerations on page 29.
Table 4.
External component description
Components
Functional description
CS, CSL, CSR Supply capacitor that provides power supply filtering.
Input coupling capacitors that block the DC voltage at the amplifier input terminal.
The capacitors also form a high pass filter with Zin
(Fcl = 1 / (2 x π x Zin x Cin)). Note that the value of Zin changes with each gain setting.
Cin
These coupling capacitors are mandatory.
5/36
Application information
TS4999
Table 5.
Bump
Pin description
Name
Function
A1
B2
C1
E1
D2
A3
C3
E3
B4
D4
A5
C5
E5
B6
D6
A7
C7
E7
LIN+
LIN-
Left channel positive differential input
Left channel negative differential input
3D
3D effect digital input pin
RIN+
Right channel positive differential input
Right channel negative differential input
Standby input pin (active low) for left channel output
Gain select input pin (LSB)
RIN-
STBYL
G0
STBYR
AGND
AVCC
LOUT+
G1
Standby input pin (active low) for right channel output
Analog ground
Analog supply voltage
Left channel negative output
Gain select input pin (MSB)
ROUT+
LPVCC
RPVCC
LOUT-
PGND
ROUT-
Right channel positive output
Left channel power supply voltage
Right channel power supply voltage
Left channel negative output
Power ground
Right channel negative output
Table 6.
Truth table for output gain settings
G0
G1
Gain value (dB)
0
0
1
1
0
1
0
1
3.5
6
9.5
12
Note:
See Table 3 on page 4.
Table 7.
Truth table for 3D effects pin settings
3D
3D effect
0
1
OFF
ON
6/36
TS4999
Electrical characteristics
3
Electrical characteristics
.
Table 8.
Symbol
V
= +5 V, GND = 0 V, T
= 25° C (unless otherwise specified)
amb
CC
Parameter
Conditions
Min. Typ. Max. Unit
ICC
Supply current
No input signal, no load, both channels
No input signal, Vstdby = GND
5
1
7
2
mA
ISTANDBY Standby current
μA
Floating inputs, RL = 8Ω, G = 3.5dB,
Voo
Po
Output offset voltage
Output power
20
mV
W
3D effect off
THD = 1% max, F = 1kHz, RL = 4Ω
THD = 1% max, F = 1kHz, RL = 8Ω
THD = 10% max, F = 1kHz, RL = 4Ω
THD = 10% max, F = 1kHz, RL = 8Ω
2.25
1.35
2.8
W
W
1.7
Total harmonic distortion + Po = 0.9W/Ch, G = 6dB, F=1kHz,
THD+N
0.2
%
%
noise
RL = 8Ω
Po = 2.3 WRMS, RL = 4Ω +15µH
Po = 1.4 WRMS, RL = 8Ω + 15µH
Cin = 1µF (1),3D effects off
82
89
Efficiency Efficiency per channel
Power supply rejection ratio
PSRR
65
dB
F = 217Hz, RL = 8Ω, gain = 6dB,
Vripple = 200mVpp, Inputs grounded
with inputs grounded
F = 1kHz, RL = 8Ω,
Crosstalk Channel separation
100
57
dB
dB
3D effects off
Common mode rejection
Cin=1µF, F = 217Hz, RL = 8Ω, gain = 6dB,
ΔVIC = 200mVpp, 3D effects OFF
CMRR
ratio
G1 = G0 = "0"
3
5.5
9
3.5
6
4
G1 = "0" & G0 = "1"
G1 = "1" & G0 = "0"
G1 = G0 = "1"
6.5
10
Gain
Gain value with no load
dB
9.5
12
11.5
12.5
G1 = G0 = 3D = "0" or
G1 = "0" & G0 = "1" & 3D = "0" or
G1 = "1" & G0 = "0" & 3D = "0"
24
12
30
15
36
18
kΩ
kΩ
kΩ
G1 = "1" & G0 = "1" & 3D = "0"
Single-ended input
impedance referred to GND
ZIN
G1 = G0 = "0" & 3D = "1" or
G1 = "0" & G0 = "1" & 3D = "1" or
G1 = "1" & G0 = "0" & 3D = "1"
13.5 17.1 20.5
G1 = "1" & G0 = "1" & G3D = "1"
6.5
8.6
10.5
370
Pulse width modulator
base frequency
FPWM
190
280
kHz
Po = 1.3W, A-weighting, RL = 8Ω,
SNR
tWU
Signal to noise ratio
Wake-up time
99
13
dB
ms
Gain = 6dB, 3D effects OFF
Total wake-up time(2)
9
16.5
7/36
Electrical characteristics
TS4999
Table 8.
Symbol
V
= +5 V, GND = 0 V, T
= 25° C (unless otherwise specified) (continued)
amb
CC
Parameter
Conditions
Min. Typ. Max. Unit
tSTBY
Standby time
Standby time(2)
11
15.8
20
ms
F = 20Hz to 20kHz, A-weighted,
Gain = 3.5dB
Filterless, 3D effect off, RL = 4Ω
Filterless, 3D effect on, RL = 4Ω
With LC output filter, 3D effect off, RL = 4Ω
With LC output filter, 3D effect on, RL = 4Ω
Filterless, 3D effect off, RL = 8Ω
Filterless, 3D effect on, RL = 8Ω
With LC output filter, 3D effect off, RL = 8Ω
With LC output filter, 3D effect on, RL = 8Ω
31
50
30
48
32
51
31
50
VN
Output voltage noise
μVRMS
1. Dynamic measurements - 20*log(rms(Vout)/rms(Vripple)). Vripple is the super-imposed sinus signal to VCC at f = 217 Hz
with fixed Cin cap (input decoupling capacitor).
2. See Section 4.6: Wakeup (tWU) and shutdown (tSTBY) times on page 26.
8/36
TS4999
Electrical characteristics
.
Table 9.
Symbol
V
= +3.6V, GND = 0V, T
= 25°C (unless otherwise specified)
amb
CC
Parameter
Conditions
Min. Typ. Max. Unit
ICC
Supply current
No input signal, no load, both channels
No input signal, Vstdby = GND
3.5
1
5.5
2
mA
ISTANDBY Standby current
μA
Floating inputs, RL = 8Ω, G = 3.5dB,
Voo
Po
Output offset voltage
Output power
20
mV
W
3D effect off
THD = 1% max, F = 1kHz, RL = 4Ω
THD = 1% max, F = 1kHz, RL = 8Ω
THD = 10% max, F = 1kHz, RL = 4Ω
THD = 10% max, F = 1kHz, RL = 8Ω
1.15
0.7
1.45
0.86
W
W
Total harmonic distortion + Po = 0.45W/Ch, G = 6dB, F=1kHz,
THD+N
0.15
%
%
noise
RL = 8Ω
Po = 1.15 WRMS, RL = 4Ω +15µH
Po = 0.7 WRMS, RL = 8Ω + 15µH
Cin = 1µF (1),3D effects off
82
89
Efficiency Efficiency per channel
Power supply rejection ratio
PSRR
64
dB
F = 217Hz, RL = 8Ω, gain = 6dB,
Vripple = 200mVpp, inputs grounded
with inputs grounded
F = 1kHz, RL = 8Ω,
Crosstalk Channel separation
102
55
dB
dB
3D effects off
Common mode rejection
Cin=1µF, F = 217Hz, RL = 8Ω, gain = 6dB,
ΔVIC = 200mVpp, 3D effects off
CMRR
ratio
G1 = G0 = "0"
3
5.5
9
3.5
6
4
G1 = "0" & G0 = "1"
G1 = "1" & G0 = "0"
G1 = G0 = "1"
6.5
10
Gain
Gain value with no load
dB
9.5
12
11.5
12.5
G1 = G0 = 3D = "0" or
G1 = "0" & G0 = "1" & 3D = "0" or
G1 = "1" & G0 = "0" & 3D = "0"
24
12
30
15
36
18
kΩ
kΩ
kΩ
G1 = "1" & G0 = "1" & 3D = "0"
Single-ended input
impedance referred to GND
ZIN
G1 = G0 = "0" & 3D = "1" or
G1 = "0" & G0 = "1" & 3D = "1" or
G1 = "1" & G0 = "0" & 3D = "1"
13.5 17.1 20.5
G1 = "1" & G0 = "1" & G3D = "1"
6.5
8.6
10.5
370
kΩ
Pulse width modulator
base frequency
FPWM
190
280
kHz
Po = 0.67W, A-weighting, RL = 8Ω,
SNR
tWU
Signal to noise ratio
Wake-up time
97
dB
ms
Gain = 6dB, 3D effects OFF
Total wake-up time(2)
7.5
11.3
15
9/36
Electrical characteristics
TS4999
Table 9.
Symbol
V
= +3.6V, GND = 0V, T
= 25°C (unless otherwise specified) (continued)
amb
CC
Parameter
Conditions
Min. Typ. Max. Unit
tSTBY
Standby time
Standby time(2)
10
13.8
18
ms
F = 20Hz to 20kHz, A-Weighted,
Gain = 3.5dB
Filterless, 3D effect off, RL = 4Ω
Filterless, 3D effect on, RL = 4Ω
With LC output filter, 3D effect off, RL = 4Ω
With LC output filter, 3D effect on, RL = 4Ω
Filterless, 3D effect off, RL = 8Ω
Filterless, 3D effect on, RL = 8Ω
With LC output filter, 3D effect off, RL = 8Ω
With LC output filter, 3D effect on, RL = 8Ω
29
49
28
48
29
50
29
50
VN
Output voltage noise
μVRMS
1. Dynamic measurements - 20*log(rms(Vout)/rms(Vripple)). Vripple is the super-imposed sinus signal to VCC at f = 217 Hz
with fixed Cin cap (input decoupling capacitor).
2. See Section 4.6: Wakeup (tWU) and shutdown (tSTBY) times on page 26.
10/36
TS4999
Electrical characteristics
Table 10.
Symbol
V
= +2.5 V, GND = 0V, T
= 25° C (unless otherwise specified)
amb
CC
Parameter
Conditions
Min. Typ. Max. Unit
ICC
Supply current
No input signal, no load, both channels
No input signal, Vstdby = GND
2.8
1
4
2
mA
ISTANDBY Standby current
μA
Floating inputs, RL = 8Ω, G = 3.5dB,
Voo
Po
Output offset voltage
Output power
20
mV
W
3D effect off
THD = 1% max, F = 1kHz, RL = 4Ω
THD = 1% max, F = 1kHz, RL = 8Ω
THD = 10% max, F = 1kHz, RL = 4Ω
THD = 10% max, F = 1kHz, RL = 8Ω
0.53
0.33
0.67
0.4
W
W
Total harmonic distortion + Po = 0.2W/Ch, G = 6dB, F=1kHz,
THD+N
0.07
%
%
noise
RL = 8Ω
Po = 0.52 WRMS, RL = 4Ω +15µH
Po = 0.33 WRMS, RL = 8Ω + 15µH
Cin = 1µF (1),3D effects off
81
88
Efficiency Efficiency per channel
Power supply rejection ratio
PSRR
63
dB
F = 217Hz, RL = 8Ω, gain = 6dB,
Vripple = 200mVpp, Inputs grounded
with inputs grounded
F = 1kHz, RL = 8Ω,
Crosstalk Channel separation
104
55
dB
dB
3D effects off
Common mode rejection
Cin=1µF, F = 217Hz, RL = 8Ω, gain = 6dB,
ΔVIC = 200mVpp, 3D effects off
CMRR
ratio
G1 = G0 = "0"
3
5.5
9
3.5
6
4
G1 = "0" & G0 = "1"
G1 = "1" & G0 = "0"
G1 = G0 = "1"
6.5
10
Gain
Gain value with no load
dB
9.5
12
11.5
12.5
G1 = G0 = 3D = "0" or
G1 = "0" & G0 = "1" & 3D = "0" or
G1 = "1" & G0 = "0" & 3D = "0"
24
12
30
15
36
18
kΩ
kΩ
kΩ
G1 = "1" & G0 = "1" & 3D = "0"
Single-ended input
impedance referred to GND
ZIN
G1 = G0 = "0" & 3D = "1" or
G1 = "0" & G0 = "1" & 3D = "1" or
G1 = "1" & G0 = "0" & 3D = "1"
13.5 17.1 20.5
G1 = "1" & G0 = "1" & G3D = "1"
6.5
8.6
10.5
370
kΩ
Pulse width modulator
base frequency
FPWM
190
280
kHz
Po = 0.3W, A-weighting, RL = 8Ω,
SNR
tWU
Signal to noise ratio
Wake-up time
94
dB
ms
Gain = 6dB, 3D effects OFF
Total wake-up time(2)
3
7.8
12
11/36
Electrical characteristics
TS4999
= 25° C (unless otherwise specified) (continued)
Table 10.
Symbol
V
= +2.5 V, GND = 0V, T
Parameter
CC
amb
Conditions
Min. Typ. Max. Unit
tSTBY
Standby time
Standby time(2)
8
12
16
ms
F = 20Hz to 20kHz, A-Weighted,
Gain = 3.5dB
Filterless, 3D effect off, RL = 4Ω
Filterless, 3D effect on, RL = 4Ω
With LC output filter, 3D effect off, RL = 4Ω
With LC output filter, 3D effect on, RL = 4Ω
Filterless, 3D effect off, RL = 8Ω
Filterless, 3D effect on, RL = 8Ω
With LC output filter, 3D effect off, RL = 8Ω
With LC output filter, 3D effect on, RL = 8Ω
28
47
27
45
28
48
28
47
VN
Output voltage noise
μVRMS
1. Dynamic measurements - 20*log(rms(Vout)/rms(Vripple)). Vripple is the super-imposed sinus signal to VCC at f = 217 Hz
with fixed Cin cap (input decoupling capacitor).
2. See Section 4.6: Wakeup (tWU) and shutdown (tSTBY) times on page 26.
12/36
TS4999
Electrical characteristics
3.1
Electrical characteristic curves
The graphs shown in this section use the following abbreviations.
●
R + 15 µH or 30 µH = pure resistor + very low series resistance inductor.
L
●
Filter = LC output filter (1 µF+ 30 µH for 4 Ω and 0.5 µF+15 µH for 8 Ω).
All measurements are done with C = C =1 µF and C = 100 nF (see Figure 2), except
SL
SR
S
for the PSRR where C , C is removed (see Figure 3).
SL
SR
Figure 2.
Measurement test diagram
CsL
(CsR)
Cs
VCC
μ
1 F
100nF
GND
GND
RL
4 or 8
Cin
Cin
Ω
Out+
In+
5th order
50kHz
μ
μ
15 H or 30 H
1/2 TS4999
or
low-pass filter
LC Filter
In-
Out-
GND
Audio Measurement
Bandwith < 30kHz
13/36
Electrical characteristics
Figure 3.
TS4999
PSRR measurement test diagram
Cs
100nF
VCC
20Hz to 20kHz
Vripple
Vcc
GND
GND
μ
1 F
RL
4 or 8
Cin
Ω
Out+
In+
5th order
50kHz
μ
μ
15 H or 30 H
1/2 TS4999
or
low-pass filter
LC Filter
In-
Out-
Cin
μ
1 F
GND
GND
5th order
50kHz
RMS Selectiv e Meas urement
Bandwith =1% of Fm eas
reference
low-pass filter
14/36
TS4999
Electrical characteristics
Figure 4.
Current consumption vs. power
supply voltage
Figure 5.
Current consumption vs. standby
voltage (one channel)
6
3
No load
Tamb = 25
Vcc=5V
°
C
5
4
3
2
1
0
Both channels active
Vcc=3.6V
2
1
One channel active
One channel active
Vcc=2.5V
No load
Tamb = 25
°C
0
0
1
2
3
4
5
0
1
2
3
4
5
Standby Voltage (V)
Power Supply Voltage (V)
Figure 6.
Standby current consumption vs. Figure 7.
power supply voltage
Efficiency vs. output power
(one channel)
1.4
100
1.0
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0.0
No load
VSTBYL = VSTBYR = GND
Tamb = 25
1.2
1.0
0.8
0.6
0.4
0.2
0.0
°
C
80
60
40
20
0
Efficiency
Power dissipation
Vcc = 5V
RL = 4
F = 1kHz
Ω
+ 15μH
THD+N
≤
10%
2.8
0
1
2
3
4
5
0.0
0.4
0.8
1.2
1.6
2.0 2.4
Output Power (W)
Power Supply Voltage (V)
Figure 8.
Efficiency vs. output power
(one channel)
Figure 9.
Efficiency vs. output power
(one channel)
100
80
60
40
20
0
0.50
0.45
0.40
0.35
0.30
0.25
0.20
0.15
0.10
0.05
0.00
100
80
60
40
20
0
0.24
0.22
0.20
0.18
0.16
0.14
0.12
0.10
0.08
0.06
0.04
0.02
0.00
Efficiency
Efficiency
Power dissipation
Power dissipation
Vcc = 2.5V
RL = 4 + 15
F = 1kHz
THD+N
Vcc = 3.6V
RL = 4 + 15
F = 1kHz
Ω
μH
Ω
μH
≤
10%
THD+N
≤
10%
0.0
0.2
0.4
0.6
0.8
1.0
1.2
1.4
1.6
0.0
0.1
0.2
0.3
0.4
0.5
0.6 0.7
Output Power (W)
Output Power (W)
15/36
Electrical characteristics
TS4999
Figure 10. Efficiency vs. output power
(one channel)
Figure 11. Efficiency vs. output power
(one channel)
100
0.30
0.28
0.26
0.24
0.22
0.20
0.18
0.16
0.14
0.12
0.10
0.08
0.06
0.04
0.02
0.00
100
0.15
0.10
0.05
80
80
Efficiency
Efficiency
60
60
Power dissipation
Power dissipation
40
40
Vcc = 5V
Vcc = 3.6V
RL = 8 + 15
F = 1kHz
20
20
RL = 8
Ω + 15μH
Ω
μH
F = 1kHz
THD+N
1.4
≤
10%
THD+N
≤
10%
0
0
0.00
0.9
0.0
0.2
0.4
0.6
0.8
1.0
1.2
1.6
1.8
0.0
0.1
0.2
0.3
0.4
0.5
0.6 0.7
0.8
Output Power (W)
Output Power (W)
Figure 12. Efficiency vs. output power
(one channel)
Figure 13. THD+N vs. output power
10
100
80
0.08
0.06
0.04
0.02
0.00
F = 1kHz
RL = 4
Ω + 15μH
Vcc=5V
Vcc=3.6V
G = +6dB
BW < 30kHz
Tamb = 25°C
Efficiency
60
1
Power dissipation
40
Vcc=2.5V
Vcc = 2.5V
20
RL = 8
F = 1kHz
THD+N
Ω
+ 15
μH
0.1
≤
10%
0
0.01
0.1
Output power (W)
1
0.00 0.05 0.10 0.15 0.20 0.25 0.30 0.35 0.40 0.45
Output Power (W)
Figure 14. THD+N vs. output power
Figure 15. THD+N vs. output power
10
10
F = 1kHz
F = 1kHz
Vcc=5V
RL = 4
Ω
+ 30
μ
H
RL = 8Ω + 15μH
Vcc=5V
Vcc=3.6V
G = +6dB
BW < 30kHz
Tamb = 25
G = +6dB
BW < 30kHz
Tamb = 25°C
Vcc=3.6V
Vcc=2.5V
°
C
1
1
Vcc=2.5V
0.1
0.1
0.01
0.1
Output power (W)
1
0.01
0.1
1
Output power (W)
16/36
TS4999
Electrical characteristics
Figure 16. THD+N vs. output power
Figure 17. THD+N vs. frequency
10
10
Vcc = 5V
RL = 4
G = +6dB
BW < 30kHz
Tamb = 25
F = 1kHz
Vcc=5V
Ω
+ 15μH
RL = 8
Ω + 30μH
G = +6dB
BW < 30kHz
Tamb = 25°C
Vcc=3.6V
Vcc=2.5V
°
C
Po=1500mW
1
1
0.1
0.01
Po=750mW
10000
0.1
0.01
0.1
1
20
100
1000
Output power (W)
Frequency (Hz)
Figure 18. THD+N vs. frequency
Figure 19. THD+N vs. frequency
10
10
Vcc = 3.6V
Vcc = 2.5V
RL = 4
Ω
+ 15
μ
H
RL = 4Ω + 15μH
G = +6dB
G = +6dB
BW < 30kHz
BW < 30kHz
Tamb = 25°C
Po=400mW
Tamb = 25
°
C
Po=800mW
1
1
0.1
0.1
Po=400mW
Po=200mW
0.01
0.01
20
20
100
1000
10000
100
1000
10000
Frequency (Hz)
Frequency (Hz)
v
Figure 20. THD+N vs. frequency
Figure 21. THD+N vs. frequency
10
10
Vcc = 5V
Vcc = 3.6V
RL = 4Ω + 30μH
G = +6dB
RL = 4Ω + 30μH
G = +6dB
BW < 30kHz
BW < 30kHz
Tamb = 25°C
Po=1500mW
Tamb = 25°C
1
1
Po=800mW
0.1
0.1
Po=400mW
Po=750mW
0.01
0.01
20
20
100
1000
10000
100
1000
10000
Frequency (Hz)
Frequency (Hz)
17/36
Electrical characteristics
TS4999
Figure 22. THD+N vs. frequency
Figure 23. THD+N vs. frequency
10
10
Vcc = 5V
Vcc = 5V
RL = 4
Ω
+ 30
μ
H
RL = 8Ω + 15μH
G = +6dB
G = +6dB
BW < 30kHz
BW < 30kHz
Tamb = 25
°
C
Po=1500mW
Tamb = 25°C
Po=900mW
1
1
0.1
0.1
Po=750mW
Po=450mW
0.01
0.01
20
20
100
1000
10000
100
1000
10000
Frequency (Hz)
Frequency (Hz)
Figure 24. THD+N vs. frequency
Figure 25. THD+N vs. frequency
10
10
Vcc = 3.6V
Vcc = 2.5V
RL = 8
Ω
+ 15
μ
H
RL = 8Ω + 15μH
G = +6dB
G = +6dB
BW < 30kHz
BW < 30kHz
Tamb = 25
°
C
Tamb = 25°C
1
1
Po=450mW
Po=200mW
0.1
0.1
Po=225mW
Po=100mW
0.01
0.01
20
20
100
1000
Frequency (Hz)
10000
100
1000
10000
Frequency (Hz)
Figure 26. THD+N vs. frequency
Figure 27. THD+N vs. frequency
10
10
Vcc = 5V
Vcc = 3.6V
RL = 8Ω + 30μH
G = +6dB
RL = 8Ω + 30μH
G = +6dB
BW < 30kHz
Tamb = 25°C
BW < 30kHz
Tamb = 25°C
Po=900mW
1
1
Po=450mW
0.1
0.1
Po=450mW
Po=225mW
0.01
0.01
20
20
100
1000
10000
100
1000
10000
Frequency (Hz)
Frequency (Hz)
18/36
TS4999
Electrical characteristics
Figure 28. THD+N vs. frequency
Figure 29. Output power vs. power supply
voltage
10
2.8
2.6
Vcc = 2.5V
F = 1kHz
RL = 8
Ω + 30μH
BW < 30kHz
2.4
G = +6dB
BW < 30kHz
Tamb = 25°C
Tamb = 25°C
2.2
2.0
1.8
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0.0
1
Po=200mW
RL=4
Ω +≥15μH
0.1
Po=100mW
RL=8
Ω
+
≥
15
μ
H
0.01
2.5
3.0
3.5
4.0
4.5
5.0
5.5
20
100
1000
10000
Supply voltage (V)
Frequency (Hz)
Figure 30. Output power vs. power supply
voltage
Figure 31. Crosstalk vs. frequency
(3D effect off)
3.4
0
F = 1kHz
BW < 30kHz
Tamb = 25°C
3.2
3.0
2.8
2.6
2.4
2.2
2.0
1.8
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0.0
Vcc = 5V
-10
RL = 4
Ω +≥15μH
-20
-30
G = +6dB
Cin = 1
Tamb = 25
μ
F
°
C
-40
RL=4
Ω
+
≥
15
μ
H
-50
-60
-70
-80
Po=500mW
Po=1000mW
-90
RL=8
Ω +≥15μH
-100
-110
-120
Po=1500mW
Po=1800mW
1000
20
2.5
3.0
3.5
4.0
4.5
5.0
5.5
100
10000
Supply voltage (V)
Frequency (Hz)
Figure 32. Crosstalk vs. frequency
(3D effect off)
Figure 33. Crosstalk vs. frequency
(3D effect off)
0
0
Vcc = 3.6V
Vcc = 2.5V
-10
-10
RL = 4
Ω +≥15μH
RL = 4
Ω +≥15μH
-20
-30
-20
-30
G = +6dB
Cin = 1
Tamb = 25
G = +6dB
Cin = 1
Tamb = 25
μ
F
μ
F
°
C
°
C
-40
-40
-50
-50
-60
-60
-70
-70
Po=125mW
-80
-80
Po=500mW
Po=250mW
Po=750mW
Po=325mW
Po=250mW
-90
-90
-100
-110
-120
-100
-110
-120
Po=900mW
1000
Po=450mW
20
20
100
10000
100
1000
Frequency (Hz)
10000
Frequency (Hz)
19/36
Electrical characteristics
TS4999
Figure 34. Crosstalk vs. frequency
(3D effect off)
Figure 35. Crosstalk vs. frequency
(3D effect off)
0
0
Vcc = 5V
Vcc = 3.6V
-10
-10
RL = 8
Ω +≥15μH
RL = 8
Ω +≥15μH
-20
-30
-20
-30
G = +6dB
Cin = 1
Tamb = 25
G = +6dB
Cin = 1
Tamb = 25
μ
F
μ
F
°
C
°
C
-40
-40
-50
-50
-60
-60
-70
-70
-80
-80
Po=160mW Po=320mW
Po=500mW
Po=600mW
Po=600mW
Po=300mW
-90
-90
-100
-110
-120
-100
-110
-120
Po=1100mW
1000
Po=900mW
100
20
20
10000
100
1000
Frequency (Hz)
10000
Frequency (Hz)
Figure 36. Crosstalk vs. frequency
(3D effect off)
Figure 37. Gain vs. frequency
(3D effect off)
0
5
4
3
Vcc = 2.5V
no load
-10
RL = 8
Ω +≥15μH
-20
-30
G = +6dB
Cin = 1
Tamb = 25
μ
F
°
C
-40
-50
-60
RL=8
RL=8
RL=4
Ω
+15
μ
H
-70
Po=75mW
Po=225mW
Po=270mW
2
1
0
Ω
+30
μ
H
-80
-90
Ω
+15μH
Gain = 3.5dB
Vin = 400mVrms
Po=150mW
100
-100
-110
-120
RL=4
Ω
+30
μ
H
Cin = 10
Tamb = 25
100
μF
°
C
20
1000
10000
20k
20
1k
10k
Frequency (Hz)
Frequency (Hz)
Figure 38. Gain vs. frequency
(3D effect off)
Figure 39. Gain vs. frequency
(3D effect off)
8
7
6
12
11
10
9
no load
no load
5
4
3
2
RL=8
Ω
+15
μ
H
RL=8
Ω
+15
μ
H
8
7
6
5
RL=8
Ω
+30
μ
H
RL=8
Ω
+30
μH
RL=4
Ω
+15
μ
H
RL=4
Ω
+15
μH
Gain = 6dB
Vin = 300mVrms
Gain = 9.5dB
Vin = 200mVrms
RL=4
Ω
+30
μ
H
RL=4
Ω+30μH
Cin = 10
Tamb = 25
100
μ
F
Cin = 10
Tamb = 25
100
μF
°
C
°C
20k
20k
20
1k
Frequency (Hz)
10k
20
1k
Frequency (Hz)
10k
20/36
TS4999
Electrical characteristics
Figure 40. Gain vs. frequency
(3D effect off)
Figure 41. PSRR vs. frequency
(3D effect off)
0
-10
-20
-30
-40
-50
-60
-70
-80
-90
14
13
12
Inputs grounded
Vcc = 5V, 3D effect off
Vripple = 200mVpp
Cin = 10μF
RL = 8Ω +≥ 15μH
Tamb = 25°C
no load
11
10
9
RL=8
Ω
+15
μ
H
G=+9.5dB
G=+12dB
G=+6dB
RL=8
Ω
+30
μH
RL=4
Ω
+15
μH
Gain = 12dB
Vin = 150mVrms
RL=4
Ω
+30μH
Cin = 10
Tamb = 25
100
μF
G=+3.5dB
°
C
8
20k
20
1k
Frequency (Hz)
10k
20
100
1000
Frequency (Hz)
10000
10000
10000
Figure 42. PSRR vs. frequency
(3D effect off)
Figure 43. PSRR vs. frequency
(3D effect off)
0
0
Inputs grounded
Inputs grounded
Vcc = 2.5V, 3D effect off
Vripple = 200mVpp
Cin = 10μF
RL = 8Ω +≥ 15μH
Tamb = 25°C
-10
-10
Vcc = 3.6V, 3D effect off
Vripple = 200mVpp
-20
-20
Cin = 10μF
RL = 8
Ω +≥ 15μH
-30
-40
-50
-60
-70
-80
-90
-30
-40
-50
-60
-70
-80
-90
Tamb = 25
°
C
G=+9.5dB
G=+3.5dB
G=+12dB
G=+6dB
G=+12dB
G=+9.5dB
G=+3.5dB
G=+6dB
20
20
100
1000
Frequency (Hz)
10000
100
1000
Frequency (Hz)
Figure 44. PSRR vs. frequency
(3D effect on)
Figure 45. PSRR vs. frequency
(3D effect on)
0
0
Inputs grounded
Vcc = 5V, 3D effect on
Vripple = 200mVpp
Inputs grounded
Vcc = 3.6V, 3D effect on
Vripple = 200mVpp
-10
-20
-30
-40
-50
-60
-70
-80
-10
-20
-30
-40
-50
-60
-70
-80
Cin = 10
RL = 8
Tamb = 25
μF
Cin = 10
RL = 8
Tamb = 25
μF
+≥ 15μH
°
Ω
+
≥
15
C
μ
H
Ω
°
C
G=+12dB
G=+6dB
G=+12dB
G=+6dB
G=+9.5dB
G=+9.5dB
G=+3.5dB
G=+3.5dB
20
20
100
1000
Frequency (Hz)
10000
100
1000
Frequency (Hz)
21/36
Electrical characteristics
TS4999
Figure 46. PSRR vs. frequency
(3D effect on)
Figure 47. CMRR vs. frequency
(3D effect off)
0
0
Vcc = 5V, 3D effect off
Inputs grounded
ΔVic = 200mVpp
Vcc = 2.5V, 3D effect on
Vripple = 200mVpp
-10
-20
-30
-40
-50
-60
-70
-80
-10
Cin = 10μF
-20 RL = 8Ω +≥ 15μH
Tamb = 25°C
-30
Cin = 10
RL = 8
Tamb = 25
μF
+≥ 15μH
°
Ω
C
G=+9.5dB
G=+12dB
-40
-50
-60
-70
-80
G=+12dB
G=+6dB
G=+9.5dB
G=+3.5dB
G=+6dB
G=+3.5dB
20
20
100
1000
Frequency (Hz)
10000
100
1000
Frequency (Hz)
10000
Figure 48. CMRR vs. frequency
(3D effect off)
Figure 49. CMRR vs. frequency
(3D effect off)
0
0
Vcc = 3.6V, 3D effect off
Vcc = 2.5V, 3D effect off
Δ
Vic = 200mVpp
Cin = 10
RL = 8
Tamb = 25
ΔVic = 200mVpp
Cin = 10μF
-20 RL = 8Ω +≥ 15μH
Tamb = 25°C
-30
-10
-20
-30
-40
-50
-60
-70
-80
-10
μ
F
Ω
+≥ 15μH
°
C
G=+9.5dB
G=+12dB
G=+9.5dB
G=+12dB
-40
-50
-60
G=+3.5dB
G=+6dB
G=+3.5dB
G=+6dB
-70
-80
20
20
100
1000
Frequency (Hz)
10000
100
1000
Frequency (Hz)
10000
Figure 50. CMRR vs. frequency
(3D effect on)
Figure 51. CMRR vs. frequency
(3D effect on)
0
0
Vcc = 3.6V, 3D effect on
Vcc = 5V, 3D effect on
Δ
Vic = 200mVpp
Cin = 10
RL = 8
Tamb = 25
Δ
Vic = 200mVpp
Cin = 10
-20 RL = 8
Tamb = 25
-10
-10
-20
-30
-40
-50
-60
-70
-80
μ
F
μ
F
Ω
+≥ 15μH
Ω
+≥ 15μH
°
C
°
C
-30
-40
-50
-60
-70
-80
G=+12dB
G=+12dB
G=+9.5dB
G=+9.5dB
G=+6dB
G=+6dB
G=+3.5dB
G=+3.5dB
20
20
100
1000
Frequency (Hz)
10000
100
1000
Frequency (Hz)
10000
22/36
TS4999
Electrical characteristics
Figure 52. CMRR vs. frequency
(3D effect on)
Figure 53. Power derating curves
0
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0.0
Vcc = 2.5V, 3D effect on
Δ
Vic = 200mVpp
Cin = 10
-20 RL = 8
Tamb = 25
-10
μ
F
With a 4-layer PCB
Ω
+≥ 15μH
°
C
-30
-40
-50
-60
-70
-80
G=+12dB
G=+9.5dB
G=+3.5dB
G=+6dB
No Heat sink
AMR value
0
25
50
75
100
C)
125
150
20
100
1000
Frequency (Hz)
10000
Ambiant Temperature (
°
Figure 54. Startup and shutdown phase
= 5 V, G= 6 dB, C = 1 µF,
Figure 55. Startup and shutdown phase
= 5 V, G= 6 dB, C = 1 µF, inputs
V
V
CC
CC
in
in
V = 2 V , F= 500 Hz
grounded
in
pp
Out+
Out-
Out+
Out-
Standby
Standby
Out+ - Out-
Out+ - Out-
23/36
Application information
TS4999
4
Application information
4.1
Differential configuration principle
The TS4999 is a monolithic fully-differential input/output class D stereo power amplifier. The
TS4999 also features 3D effect enhancement that can be switched on or off by one digital
pin. Additionally, since the load is connected differentially compared to a single-ended
topology, the output is four times higher for the same power supply voltage.
A fully-differential amplifier offers the following advantages.
●
●
●
A high PSRR (power supply rejection ratio).
A high common mode noise rejection.
Virtually zero pop with no additional circuitry, giving a faster start-up time compared to
conventional single-ended input amplifiers.
●
Easier interfacing with differential output audio DACs.
4.2
Gain settings
In the flat region of the frequency-response curve (no input coupling capacitor or internal
feedback loop + load effect), the differential gain can be set to 3.5, 6, 9.5 or 12 dB,
depending on the logic level of the G0 and G1 pins, as shown in Table 11.
Table 11. Gain settings with G0 and G1 pins
G1
G0
Gain (dB)
Gain (V/V)
0
0
1
1
0
1
0
1
3.5
6
1.5
2
9.5
12
3
4
Note:
Between pins G0, G1 and GND there is an internal 300 kΩ (+/-20%) resistor. When the pins
are floating, the gain is 6 dB. In full standby (left and right channels OFF), these resistors
are disconnected (HiZ input).
4.3
3D effect enhancement
The TS4999 features 3D audio effects which can be switched off and switched on through
input pin 3D when used as a digital interface. The relation between the logic level of this pin
and the on/off 3D effect is shown in Table 3 on page 4 and Table 7 on page 6.
The 3D audio effect evokes the perception of spatial hearing of stereo audio signals and
improves this effect in cases where the stereo speakers are too close to each other, such as
in small or portable devices.
The perceived amount of 3D effect also depends on many factors such as speaker position,
distance between speakers, listener/frequency spectrum of the audio signal, as well as the
difference of signal between the left and right channel.
24/36
TS4999
Application information
In some cases, the speaker volume can increase when the 3D effect is switched on. This
factor is dependent on the composition and frequency spectrum of listened stereo audio
signal.
Note:
1
2
When the 3D effect is switched on, both channels must be in operation or shutdown mode at
the same time.
Between pin 3D and GND there is an internal 300 kΩ (+/-20%) resistor. When the pin is
floating, the 3D effect is off. In full standby (left and right channels OFF), this resistor is
disconnected (HiZ input).
4.4
Low frequency response
If a low frequency bandwidth limitation is required, input coupling capacitors can be used. In
the low frequency region, the input coupling capacitor C starts to have an effect. C forms,
in
in
with the input impedance Z , a first order high-pass filter with a -3 dB cut-off frequency.
in
1
FCL = --------------------------------------------
2 ⋅ π ⋅ Zin ⋅ Cin
So, for a desired cut-off frequency F , C is calculated as follows:
CL
in
1
Cin = ---------------------------------------------
2 ⋅ π ⋅ Zin ⋅ FCL
with F in Hz, Z in Ω and C in F.
CL
in
in
The input impedance Z is for the whole power supply voltage range and changes with the
in
gain setting. There is also a tolerance around the typical values (see Table 8, Table 9 and
Table 10.
Figure 56. Cut-off frequency vs. input capacitor
Tamb=25°C
G=12dB, 3D on
Zin=8.6k
Ω typ.
100
10
1
G=12dB, 3D off
Zin=15k typ.
Ω
G=3.5dB, 6dB, 9.5dB
3D off, Zin=30k
Ω typ.
G=3.5dB, 6dB, 9.5dB
3D on, Zin=17.1k typ.
Ω
0.1
1
Input Capacitor Cin (μF)
25/36
Application information
TS4999
4.5
Circuit decoupling
Power supply capacitors, referred to as C , C and C , are needed to correctly bypass the
S
SL
SR
TS4999.
The TS4999 has a typical switching frequency of 280 kHz and an output fall and rise time of
approximately 5 ns. Due to these very fast transients, careful decoupling is mandatory.
A 1 µF ceramic capacitor between each PVCC and PGND (C , C ) and one additional
SL
SR
ceramic capacitor between AVCC and AGND 0.1 µF (C ) are sufficient, but they must be
S
located as close as possible to the TS4999 in order to avoid any extra parasitic inductance
or resistance created by a long track wire. Parasitic loop inductance, in relation to di/dt,
introduces overvoltage that decreases the global efficiency of the device and may cause, if
this parasitic inductance is too high, the device to break down.
In addition, even if a ceramic capacitor has an adequate high frequency ESR (equivalent
series resistance) value, its current capability is also important. A 0603 size is a good
compromise, particularly when a 4 Ω load is used.
Another important parameter is the rated voltage of the capacitor. A 1 µF/6.3 V capacitor
used at 5 V, loses about 50% of its value. With a power supply voltage of 5 V, the decoupling
value, instead of 1 µF, could be reduced to 0.5 µF. As C has particular influence on the
S
THD+N in the medium-to-high frequency region, this capacitor variation becomes decisive.
In addition, less decoupling means higher overshoots which can be problematic if they reach
the power supply AMR value (6 V).
4.6
Wakeup (tWU) and shutdown (tSTBY) times
During the wake-up sequence, there is a delay when the standby is released to switch the
device ON. The wake-up sequence of the TS4999 consists of two phases. During the first
phase t
phase t
, a digitally-generated delay, mutes the outputs. Then, the gain increasing-
begins. The gain increases smoothly from the mute state to the preset gain
WU-A
WU-A
selected by the digital pins G0 and G1. This startup sequence avoid any pop noise during
startup of the amplifier. See Figure 57: Wake-up phase
26/36
TS4999
Application information
Figure 57. Wake-up phase
STBY
Level
STBY
HI
STBY
LO
Time
Gain increasing Preset gain
Gain
Mute
tWU-A
Mute
Time
tWU-B
tWU
When the standby command is set, the time required to set the output stage to high
impedance and to put the internal circuitry in shutdown mode is called the standby time.
This time is used to decrease the gain from its nominal value set by the digital pins G0 and
G1 to mute and avoid any pop noise during shutdown. The gain decreases smoothly until
the outputs are muted. See Figure 58: Shutdown phase.
Figure 58. Shutdown phase
STBY
Level
STBY
HI
STBY
LO
Time
Preset gain
Gain
Gain decreasing
Mute
Mute
Time
tSTBY
27/36
Application information
TS4999
4.7
Consumption in shutdown mode
Between the shutdown pin and GND there is an internal 300 kΩ (+-/20%) resistor. This
resistor forces the TS4999 to be in shutdown mode when the shutdown input is left floating.
However, this resistor also introduces additional shutdown power consumption if the
shutdown pin voltage is not at 0 V.
With a 0.4 V shutdown voltage pin for example, you must add 0.4 V/300 kΩ = 1.3 µA typical
(0.4 V/240 kΩ = 1.66 µA in maximum) for each shutdown pin to the standby current
specified in Table 8, Table 9 and Table 10.
Of course, this current will be provided by the external control device for standby pins.
4.8
Single-ended input configuration
It is possible to use the TS4999 in a single-ended input configuration. Input coupling
capacitors are also mandatory in this configuration. The schematic diagram in Figure 59
shows a typical single-ended input application.
Figure 59. Typical single-ended input application
Cs
0.1uF
CsR
1uF
CsL
1uF
VCC
VCC
VCC
Gain Select
Control
3D Effect
Control
Left Input
TS4999
AVCC
RPVCC
LPVCC
H
Cin
Cin
A1 Lin+
B2 Lin-
Lout+ A5
Lout- A7
Gain
PWM
Select
Bridge
Left speaker
C3 G0
C5 G1
Oscillator
PWM
Right Input
E1 Rin+
D2 Rin-
Rout+ E5
Rout- E7
H
Gain
Cin
Cin
Select
Bridge
Right speaker
A3 STBYL
E3 STBYR
Standby
Control
Protection
Circuit
AGND
PGND
Standby Control
28/36
TS4999
Application information
4.9
Output filter considerations
The TS4999 is designed to operate without an output filter. However, due to very sharp
transients on the TS4999 output, EMI-radiated emissions may cause some standard
compliance issues.
These EMI standard compliance issues can appear if the distance between the TS4999
outputs and loudspeaker terminal are long (typically more than 50 mm, or 100 mm in both
directions, to the speaker terminals). Because the PCB layout and internal equipment
device are different for each configuration, it is difficult to provide a one-size-fits-all solution.
However, to decrease the probability of EMI issues, there are several simple rules to follow.
●
Reduce, as much as possible, the distance between the TS4999 output pins and the
speaker terminals.
●
●
Use a ground plane for "shielding" sensitive wires.
Place, as close as possible to the TS4999 and in series with each output, a ferrite bead
with a rated current of at least 2.5 A and impedance greater than 50-Ω at frequencies
above 30 MHz. If, after testing, these ferrite beads are not necessary, replace them by
a short-circuit.
●
Allow extra footprint to place, if necessary, a capacitor to short perturbations to ground
(see Figure 60).
Figure 60. Ferrite chip bead placement
Ferrite chip bead
From output
to speaker
about 100pF
gnd
In the case where the distance between the TS4999 output and the speaker terminals is too
long, it is possible to encounter low frequency EMI issues due to the fact that the typical
operating PWM frequency is 280 kHz and that the fall and rise time of the output signal is
less than or equal to 5 ns. In this configuration, it is necessary to use the output filter
represented in Figure 61 on page 30, which consists of L1, C1, L2 and C2 being placed as
close as possible to the TS4999 outputs.
In particular cases where the output filter is used and there is the possibility to disconnect a
load, we recommended using an RC network that consists of C3 and R, as shown in
Figure 61. In this case, when the output filter is connected without any load, the filter acts as
a short-circuit for frequencies above 10 kHz in the output frequency spectrum of the
amplifier. The RC network corrects the frequency response of the output filter and
compensates this limitation.
29/36
Application information
TS4999
Table 12. Example of component selection
Component
RL = 4 Ω
RL = 8 Ω
L1
L2
C1
C2
C3
R
15μH / 1.4A
15μH / 1.4A
2μF / 10V
30μH / 0.7A
30μH / 0.7A
1μF / 10V
2μF / 10V
1μF / 10V
1μF / 10V
1μF / 10V
22Ω/ 0.25W
47Ω / 0.25W
Figure 61. LC output filter with RC network
LC Output Filter
OUT+
RC network
L1
C1
C3
R
R
L
L2
C2
OUT-
4.10
4.11
Short-circuit protection
The TS4999 includes an output short-circuit protection. This protection prevents the device
from being damaged when faults occur on the amplifier outputs.
When a channel is in operating mode and a short-circuit occurs between two outputs of the
channel or between an output and ground, the short-circuit protection detects this situation
and puts the appropriate channel into standby mode. To put the channel back into operating
mode, it is necessary to put the channel’s standby pin to logical LO and then back to logical
HI and wake-up the channel.
Thermal shutdown
The TS4999 device has an internal thermal shutdown protection mechanism to protect the
device from overheating in the event of extreme temperatures. The thermal shutdown
mechanism is activated when the device reaches 150° C. When the temperature decreases
to safe levels (around 135° C), the circuit switches back to normal operation.
30/36
TS4999
Package mechanical data
5
Package mechanical data
In order to meet environmental requirements, ST offers these devices in different grades of
ECOPACK® packages, depending on their level of environmental compliance. ECOPACK®
specifications, grade definitions and product status are available at: www.st.com.
ECOPACK® is an ST trademark.
5.1
Flip chip package
Figure 62. Flip chip package
2420 μm
Die size: 2.42x2.28 mm 100µm
Die height (including bumps): 600µm
Bumps diameter: 315µm 50µm
2280 μm
Bump diameter before reflow: 300µm 10µm
Bumps height: 250µm 40µm
Die height: 350µm 20µm
Pitch: 500µm 50µm
750μm
500μm
Coplanarity: 50µm max
Optional*: Back coating height: 40µm
866μm
866μm
40 μm*
600 μm
31/36
Package mechanical data
Figure 63. Pinout (top view)
TS4999
LOUT-
LOUT+
STDBYL
ROUT-
PGND
7
LPVCC
RPVCC
6
5
G1
G0
ROUT+
AVCC
RIN-
AGND
LIN-
4
3
STDBYR
2
1
LIN+
3D
RIN+
A
B
C
D
E
Figure 64. Marking (top view)
■ ST Logo
■ Symbol for lead-free: E
E
■ Two first product code: K9
■ third X: Assembly Line Plant code
K9 X
■ Three digits date code: Y for year - WW for week
■ The dot is for marking pin A1
YWW
32/36
TS4999
Package mechanical data
5.2
Tape and reel package
Figure 65. Schematic (top view)
1.5
4
1
1
A
A
8
Die size X + 70µm
4
All dimensions are in mm
User direction of feed
Figure 66. Recommended footprint data
33/36
Ordering information
TS4999
6
Ordering information
Table 13. Order codes
Temperature
Part number
Package
Packing
Marking
K9
range
TS4999EIJT
-40°C to +85°C
Flip chip 18
Tape & reel
34/36
TS4999
Revision history
7
Revision history
Table 14. Document revision history
Date
Revision
Changes
18-Dec-2008
1
Initial release.
35/36
TS4999
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36/36
相关型号：
TS4999EIJT
Filter-free stereo 2.8 W class D audio power amplifier with selectable 3D sound effects
STMICROELECTR
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