PT2300 [PTC]
2W x 2 Class AB Audio Power Amplifier; 2W ×2 AB类音频功率放大器
| 型号： | PT2300 |
| 厂家： | 
PRINCETON TECHNOLOGY CORP |
| 描述： | 2W x 2 Class AB Audio Power Amplifier |
| 文件： | 总15页 (文件大小：338K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
Tel: 886-2-66296288
Fax: 886-2-29174598
URL: http://www.princeton.com.tw
2W x 2 Class AB Audio Power Amplifier
PT2300
DESCRIPTION
The PT2300 is a power amplifier utilizing CMOS Technology specially designed for audio purpose. It
can deliver 2W × 2 power output to the 4Ω load. The power consumption is very low in stand-by. Total
harmonic distortion is lower than 0.03%. The output mode can be switched between the SE
(Single-Ended) or BTL (Bridge-Tied Load) mode. The built-in volume controller can change the output
volume by an external supplied DC voltage. Built-in over-temperature protection, package size is not
occupies PCB space. It is suitable for small or portable products.
FEATURES
• CMOS Technology
• Stereo input
• Output power 2W × 2 (Vcc=6V, THD=1%, RL=4Ω)
• Low harmonics distortion (0.03%)
• Include 32 steps volume controller
• SE and BTL modes operation
• Suppress the pop and click noise when mode changed
• Shutdown function, turn on can into save mode (Icc<0.7µA)
• Built-in overheat protect
APPLICATIONS
• LCD monitor (for TV)
• Portable audio
• Multimedia speakers
• Other audio applications
PT2300 V1.0
- 1 -
December, 2005
Tel: 886-2-66296288
Fax: 886-2-29174598
URL: http://www.princeton.com.tw
2W x 2 Class AB Audio Power Amplifier
PT2300
BLOCK DIAGRAM
Rf
20K
Ri
-
-OUT1
Vo1
20K
+
AMP1N
-
Vin1
+
-
Bypass
+OUT1
Voltage
Bypassand
De-Pop Noise
32 steps
DC Control
Volume
+
AMP1P
+
SE/BTL
-OUT2
-
Vin2
Vo2
Rf
20K
Ri
-
20K
+
Vcc
Shutdown
GND
AMP2N
Power
Management
-
+OUT2
+
AMP2P
DC Vol
PT2300 V1.0
- 2 -
December, 2005
Tel: 886-2-66296288
Fax: 886-2-29174598
URL: http://www.princeton.com.tw
2W x 2 Class AB Audio Power Amplifier
PT2300
PIN CONFIGURATION
16
15
14
13
12
11
10
9
Shutdown
Vcc
1
2
3
4
5
6
7
8
+OUT1
Vcc
DC Vol
Vo1
-OU T1
Bypass
SE /B TL
-OU T2
Vcc
PT2300
Vin1
Vin2
Vo2
GND
+OUT2
PIN DESCRIPTION
Pin Name I/O
Description
Pin No.
Shutdown pin。Entire IC into the shutdown mode when this pin
connected to the Vcc,
Shutdown
I
1
Vcc
DC Vol
Vo1
Vin1
Vin2
Supply voltage input
2
3
4
5
6
7
8
9
I
I
I
I
I
DC Volume control input pin
Channel 1 output for external feedback circuit
Channel 1 audio input
Channel 2 audio input
Channel 2 output for external feedback circuit
Ground
Vo2
GND
+OUT2
Vcc
O Channel 2 output (+)
Supply voltage input
-OUT2
O Channel 2 output (-)
11
12
Output mode select, connected to the Vcc for SE mode or
SE/BTL
I
GND for BTL mode
Bypass
-OUT1
Vcc
O Internal bias reference bypassing
O Channel 1 output (-)
O Supply voltage input
13
14
15
16
+OUT1
O Channel 1 output (+)
PT2300 V1.0
- 3 -
December, 2005
Tel: 886-2-66296288
Fax: 886-2-29174598
URL: http://www.princeton.com.tw
2W x 2 Class AB Audio Power Amplifier
PT2300
FUNCTION DESCRIPTION
POWER SUPPLY
The operating voltage of PT2300 is from 3V to 6V, In general operation 5V is recommended. When the
supply voltage less then 3V the IC can work properly, but the distortion reading will rise. After the
supply voltage over 6.5V, the higher stand-by current consumption will rising the temperature on chip
surface。
SHUTDOWN
When the DC supply still powered the chip Vcc, pull-up the shutdown pin to the Vcc level will take the
chip into the shutdown mode. After the shutdown mode is active the total current consumption is less
than 0.7µA, and the all of input or output pins no voltage output. When shutdown pin set to GND, the IC
is back to the normal operation.
Shutdown pin
Vcc
Output state
Shutdown ON
Normal
GND
INPUT GAIN ADJUST
The output gain of the PT2300 can be adjust by the external resistor, in normal operation 0dB gain
setting is recommended, please refer to the application circuit. If the source output level is not so high
(ex :< 2Vpp), input gain can be increase to get the proper volume. The minimum value of the input
series resistance is 10KΩ for the modest input impedance.
To make sure the input stage will not be distortion by overload, please confirm the input signal level, for
the gain set please refer to the following table:
Operating voltage Input gain = –6dB Input gain = 0dB Input gain = +6dB
VDD=3V
VDD=5V
Vin <5Vpp
Vin <8Vpp
Vin <2.5Vpp
Vin<4Vpp
Vin <1.25Vpp
Vin<2Vpp
SE/BTL MODE SWITCHING
PT2300 have two output mode, SE (Single-Ended) or BTL (Bridge-Tied Load). When driving a speaker
load suggestion set to the BTL mode for get the more power output. And driving a headphone load, it
can be set to SE mode and turn-off the un-work amplifier to decrease stand-by power consumption.
Switching between the SE/BTL modes is controlled by the SE/BTL pin, please refer to following table:
SE/BTL
Vcc
Mode
SE
GND
BTL
PT2300 V1.0
- 4 -
December, 2005
Tel: 886-2-66296288
Fax: 886-2-29174598
URL: http://www.princeton.com.tw
2W x 2 Class AB Audio Power Amplifier
PT2300
OVER TEMPERATURE PROTECTION
The PT2300 has a built-in over temperature protection circuit, it will turn off all power output when the
chip temperature over 120℃, the chip will return to normal operation automatically after the
temperature cool down to 80℃.
POP AND CLICK SURPPRESS
A power amplifier uses single supply voltage may almost have noise on output in the power-on period.
It is because of the output DC potential needs time to stable on 1/2Vcc, the period relative with the
capacitance on the Bypass pin. Higher CB value will extend the stable time, and also can suppress the
noise when power-on. In supply voltage=5V and CB=2.2µF, stable time is about 300ms. The value of
CB also relative with the value of the DC blocking capacitor connected in input terminal. In general
condition the time constant of DC blocking capacitor should be less than CB stable time.
Recommend parts values please refer to application circuit.
VOLUME CONTROLLER
The PT2300 has a built-in 32 steps volume controller, output volume is determinate by the voltage
applied on the DC Vol pin. Higher DC voltage means more output level, the relation between the
volume setup and DC Vol, please refer the following table.
[Supply voltage 5V, DC Vol input voltage showing by percentage of Vcc]
Voltage range (%VCC)
Voltage range (%VCC)
Volume
(dB)
Volume
(dB)
Step
Step
High
Low
High
Low
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
0
-1.5
-3
-4.5
-6
-7.5
-9
-10.5
-12
-13.5
-15
-16.5
-18
-19.5
-21
Vcc
64.0ꢀ
62.6ꢀ
60.9ꢀ
59.2ꢀ
57.6ꢀ
55.7ꢀ
53.8ꢀ
51.3ꢀ
48.5ꢀ
46.8ꢀ
45.1ꢀ
43.3ꢀ
41.6ꢀ
39.5ꢀ
37.4ꢀ
35.4ꢀ
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
-24
-25.5
-27
-28.5
-30
-31.5
-33
-34.5
-36
-37.5
-39
-40.5
-42
-43.5
-45
MUTE
36.0ꢀ
29.9ꢀ
28.7ꢀ
26.6ꢀ
26.0ꢀ
23.2ꢀ
21.8ꢀ
19.3ꢀ
17.2ꢀ
13.7ꢀ
12.4ꢀ
10.2ꢀ
9.5ꢀ
29.7ꢀ
28.0ꢀ
26.3ꢀ
24.6ꢀ
22.9ꢀ
20.9ꢀ
18.9ꢀ
15.9ꢀ
13.4ꢀ
11.6ꢀ
9.8ꢀ
64.1ꢀ
63.1ꢀ
61.1ꢀ
60.4ꢀ
57.8ꢀ
56.4ꢀ
53.8ꢀ
52.1ꢀ
48.7ꢀ
47.5ꢀ
45.4ꢀ
44.7ꢀ
41.8ꢀ
40.4ꢀ
37.8ꢀ
8.0ꢀ
6.3ꢀ
4.2ꢀ
2.1ꢀ
6.7ꢀ
5.2ꢀ
2.7ꢀ
-22.5
GND
PT2300 V1.0
- 5 -
December, 2005
Tel: 886-2-66296288
Fax: 886-2-29174598
URL: http://www.princeton.com.tw
2W x 2 Class AB Audio Power Amplifier
PT2300
If an ordinary potential meter is use to decide the DC_Vol level, the volume setting is just to rotating the
shaft knob of potential meter to got desire volume, an extra indicator is not necessary. The output
volume is respect to the current DC_Vol level after power ON. Please take note that there is a slight
variance between the volume attenuation between different PT2300 chips at the same DC control
voltage. Thus, to obtain the same level of volume the control voltage may differ to from chip to chip.
Applying the same voltage at the DC_Vol pin, the attenuation drift may vary up to ± 4dB for different
PT2300 chips.
0
-10
-20
-30
-40
-50
-60
-70
-80
-90
-100
0
1
2
3
4
5
DC_Volume_Voltageꢀ(V)
PT2300 V1.0
- 6 -
December, 2005
Tel: 886-2-66296288
Fax: 886-2-29174598
URL: http://www.princeton.com.tw
2W x 2 Class AB Audio Power Amplifier
PT2300
HEAT DISSIPATION
During normal operation, the chip only consumes very little stand-by current. In high output power
conditions, the package temperature will rise. For proper operating temperature, a modest heat sink
mounted on the top side of the chip is required. The thermal resistance requirement of the heat sink
demand may be obtained by the formula below:
θJA =
(TJ(max) – TA) ÷ PDISS
PDISS = IC dissipation power
TJ (max) = Maximum chip conjunction temperature
TA = external environment temperature
θ JA = thermal resistance from chip conjunction to ambience environment
With 60% estimated efficiency (eff), PT2300 in 2W + 2W output power dissipation is probably
PDISS = ( Po ÷ eff ) - Po = 2.6W
The maximum chip conjunction temperature is 150℃. Exceeding this temperature will damage the chip,
assuming the outside environment air temperature is 50°C. From the chip conjunction dissipation to
external environment thermal resistance θJA should be:
θJA = ( 150 – 50 ) ÷ 2.6 = 38.4℃/W
The PT2300 chip conjunction to case thermal resistance θJC is 26℃/W. Therefore the heat sink
thermal resistance should be:
θJA –θJC = 12.4℃/W
In normal operating, no need extra heat sink, only utilize the ground (copper foil) of PCB to heat
dissipation.
PT2300 V1.0
- 7 -
December, 2005
Tel: 886-2-66296288
Fax: 886-2-29174598
URL: http://www.princeton.com.tw
2W x 2 Class AB Audio Power Amplifier
PT2300
ABSOLUTE MAXIMUM RATINGS
Parameter
Symbol Condition
Min.
0
Max.
7
Unit
V
Supply Voltage
Vcc
℃
Operating Temperature
Topr
-40
+85
℃
V
mA
Storage Temperature
Maximum Input Voltage
Maximum Input Current
Tstg
Vimax
Iimax
-65
-0.3
-10
+150
Vcc+0.3
+10
*
Note: * Input pins surge current can be reached 100mA will not induce the CMOS latched up.
PACKAGE THERMAL CHARACTERISTIC
PACKAGE TYPE: SOP16L, 300MIL
Parameter
From chip conjunction dissipation to
external environment
Symbol
Condition
Value
Unit
℃/W
θJA
88.8
Ta=25℃
From chip conjunction dissipation to
package surface
℃/W
θJC
26
PT2300 V1.0
- 8 -
December, 2005
Tel: 886-2-66296288
Fax: 886-2-29174598
URL: http://www.princeton.com.tw
2W x 2 Class AB Audio Power Amplifier
PT2300
ELECTRICAL CHARACTERISTICS
(Unless otherwise specified, Vcc=5V, bandwidth=22~22KHz)
Parameter
Supply Voltage
Symbol
Condition
Min.
3
6
8
0.2
Typ.
5
8
10
0.7
Max. Unit
Vcc
6
12
14
1
V
SE Mode
BTL Mode
Shutdown=ON
mA
µA
dB
Operating Current
Is
Two Channels Gain
Error
Gerr
THD
RIN=RF=20KΩ
-1
0
+1
Po=0.2W, RL=4Ω
Po=1W, RL=4Ω
Po=50mW, RL= 32Ω
THD=1%, RL=8Ω
THD=10%, RL=8Ω
THD=1%, RL=4Ω
THD=10%, RL=4Ω
THD=1%, RL=4Ω,
VCC=6V
0.03
0.06
0.03
1.0
1.2
1.4
0.05
0.08
0.05
1.1
1.4
1.6
0.07
0.15
0.07
1.2
THD+N
%
1.6
1.8
2.1
BTL
SE
W
1.8
2.0
Power Output
Po
1.9
2.0
2.2
THD=1%, RL=32Ω
THD=10%, RL=32Ω
A-weighted
80
100
85
25
25
85
77
58
52
-1
85
110
90
40
50
88
80
60
55
90
120
91
50
100
91
83
63
58
+1
-46
1.7
-90
-
mW
Signal-to-Noise Ratio
Residual Noise
Output Offset
SNR
Vno
Voff
dB
µV
mV
A-weighted
DC Vol = 0V, +OUT ~ -OUT
BTL
Channel Separation
CS
PSRR
Vatt
F=1KHz
F=1KHz
dB
dB
dB
SE
BTL
SE
Power Signal-to-Noise
Repel Rate
DC Vol=5V
DC Vol=17%Vcc
F=1KHz
0
Volume Control Range
-44
1.3
-85
-
-45
1.5
-88
120
80
0.6
0.2
0.9
0.1
Volume Control Step
Mute
Vstep
mute
Vatt=0 ~ -45dB
DC Vol=0V
Overheat close
Back to work
dB
dB
Temperature Protect
Shutdown Voltage
SE/BTL Voltage
TH
℃
-
-
Shutdown ON
Shutdown OFF
SE
VDD=3 ~ 5V
Shutdown pin
0.5
-
0.8
-
-
V
SD
SB
Vcc
Vcc
0.3
-
0.2
V
VDD= 3 ~ 5V
BTL
PT2300 V1.0
- 9 -
December, 2005
Tel: 886-2-66296288
Fax: 886-2-29174598
URL: http://www.princeton.com.tw
2W x 2 Class AB Audio Power Amplifier
PT2300
APPLICATION CIRCUIT
Vcc
Shutdown SW
OFF
1
2
3
4
5
6
7
8
16
15
14
13
12
11
Shutdown
Vcc
+OUT1
Vcc
Vcc
Vcc
3
ON
0.1
µ
2
Control Pin
1K
Volume Control
VR10KB
1
220µF
+
-OUT1
Bypass
DC Vol
Vo1
2.2µF
+
20K
Vcc
100K
PT2300
1
1
µ
µ
F
100K
20K
20K
+
Headphone
CH1-IN
CH2-IN
Vin1
Vin2
Vo2
SE/BTL
-OUT2
Vcc
+
220
F
+
µ
F
1K
20K
10
9
GND
+OUT2
+
0.1
µ
F
10µF
PT2300 V1.0
- 10 -
December, 2005
Tel: 886-2-66296288
Fax: 886-2-29174598
URL: http://www.princeton.com.tw
2W x 2 Class AB Audio Power Amplifier
PT2300
ORDER INFORMATION
Valid Part No.
PT2300
Package Type
Top Code
16-Pin, DIP, 300mil
16-Pin, SOP, 300mil
16-Pin, DIP, 300mil
16-Pin, SOP, 300mil
PT2300
PT2300-S
PT2300
PT2300-S
PT2300 (L)
PT2300-S (L)
PT2300-S
Notes:
1. (L), (C) or (S) = Lead Free
2. The Lead Free mark is put in front of the date code.
PT2300 V1.0
- 11 -
December, 2005
Tel: 886-2-66296288
Fax: 886-2-29174598
URL: http://www.princeton.com.tw
2W x 2 Class AB Audio Power Amplifier
PT2300
PACKAGE INFORMATION
16 PINS, DIP, 300MIL
PT2300 V1.0
- 12 -
December, 2005
Tel: 886-2-66296288
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2W x 2 Class AB Audio Power Amplifier
PT2300
Symbol
A
Min.
-
Nom.
-
Max.
0.210
-
A1
A2
b
b1
b2
b3
c
c1
D
D1
E
E1
e
eA
eB
eC
L
0.015
0.115
0.014
0.014
0.045
0.030
0.008
0.008
0.780
0.005
0.300
0.240
-
0.130
0.018
0.018
0.060
0.039
0.010
0.010
0.790
-
0.195
0.022
0.020
0.070
0.045
0.014
0.011
0.800
-
0.310
0.250
0.100 bsc
0.300 bsc
-
0.325
0.280
-
0.430
0.060
0.150
0.000
0.115
-
0.130
Notes:
1. Controlling Dimension: INCHES.
2. Dimensioning and tolerancing per ANSI Y14.5M-1982.
3. Dimensions A, A1 and L are measured with the package seated in JEDEC Seating Plane Gauge
GS-3.
4. D, D1 and E1 dimensions do not include mold flash or protrusions. Mold flash or protrusions shall
not exceed 0.010 inch.
5. E and eA measured with the leads constrained to be perpendicular to datum -C-.
6. eB and eA are measured at the lead tips with the leads unconstrained.
7. N is the maximum number of terminal positions (N=16).
8. Pointed or rounded lead tips are preferred to ease insertion.
9. b2 and b3 maximum dimensions do not include dambar protrusions. Dambar protrusions shall not
exceed 0.010 (0.25mm).
10. Variation AB is a full lead package.
11. Distance between leads including dambar protrusions to be 0.005 in minimum.
12. Datum plane -H- coincident with the bottom of lead where lead exits body.
13. Refer to JEDEC MS-001 Variation AB.
JEDEC is the registered trademark of JEDEC SOLID STATE TECHNOLOGY ASSOCIATION.
PT2300 V1.0
- 13 -
December, 2005
Tel: 886-2-66296288
Fax: 886-2-29174598
URL: http://www.princeton.com.tw
2W x 2 Class AB Audio Power Amplifier
PT2300
16 PINS, SOP, 300MIL
Symbol
Min.
Max
2.65
0.30
0.51
0.32
10.50
7.60
A
A1
B
C
D
E
e
2.35
0.10
0.33
0.23
10.10
7.40
1.27 BSC
H
h
L
10.00
0.25
0.40
0o
10.65
0.75
1.27
8o
α
PT2300 V1.0
- 14 -
December, 2005
Tel: 886-2-66296288
Fax: 886-2-29174598
URL: http://www.princeton.com.tw
2W x 2 Class AB Audio Power Amplifier
PT2300
Notes:
1. Controlling Dimension: MILLIMETER
2. Dimensioning and tolerancing per ANSI Y14.5M-1982.
3. Dimension D does not include mold flash, protrusions or gate burrs. Mold flash, protrusions and
gate burrs shall not exceed 0.15mm (0.006 in) per side.
4. Dimension E does not include interlead flash or protrusions. Interlead flash and protrusionsshall not
exceed 0.25 mm (0.010 in.) per side.
5. The chamfer on the body is optional. If it is not present, a visual index feature must be located within
the crosshatched area.
6. L is the length of the terminal for soldering to a substrate.
7. N is the number of terminal positions (N=16).
8. The lead width B, as measured 0.36 mm (0.014in) or greater above the seating plane, shall not
exceed a maximum value of 0.61mm (0.024in.)
9. Refer to JEDEC MS-013 Variation AA.
JEDEC is the registered trademark of JEDEC SOLID STATE TECHNOLOGY ASSOCIATION.
PT2300 V1.0
- 15 -
December, 2005
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