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PA3431L-N20-T [UTC]

2W STEREO AUDIO AMPLIFIER; 2W立体声音频放大器
PA3431L-N20-T
型号： PA3431L-N20-T
厂家： Unisonic Technologies    Unisonic Technologies
描述：

2W STEREO AUDIO AMPLIFIER
2W立体声音频放大器

消费电路 商用集成电路 音频放大器 视频放大器 光电二极管
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UNISONIC TECHNOLOGIES CO., LTD  
PA3431  
CMOS IC  
2W STEREO AUDIO AMPLIFIER  
„
DESCRIPTION  
As a stereo audio speaker which is operating on a single 5V  
supply, the UTC PA3431 is capable of delivering 2W of output  
power per channel into 4Ω loads in Bridge-Tied Load (BTL) mode  
with less than 1% THD+N. Way of two terminals (GAIN0 and  
GAIN1) can configured and control the amplifier gain. It also  
provided BTL gain settings of 6 dB, 10 dB, 15.6 dB, and 21.6 dB  
(inverting). Other features: the SHDN mode is supported to disable  
UTC PA3431 for the low current consumption applications; the  
current consumption can be reduced to typically 150µA.  
„
FEATURES  
*Pb-free plating product number: PA3431L  
* 2W Output power into 4ꢀ load from 5V supply each channel  
* Gain control internally  
* Differential input fully  
* Depop circuitry  
* Shutdown protection thermally  
„
ORDERING INFORMATION  
Ordering Number  
Package  
Packing  
Normal  
Lead Free Plating  
PA3431-N20-R  
PA3431-N20-T  
PA3431L-N20-R  
PA3431L-N20-T  
HTSSOP-20  
HTSSOP-20  
Tape Reel  
Tube  
www.unisonic.com.tw  
Copyright © 2008 Unisonic Technologies Co., Ltd  
1 of 11  
QW-R502-185.A  
PA3431  
CMOS IC  
„
PIN CONFIGURATION  
GND  
GND  
GAIN0  
GAIN1  
20  
19  
18  
1
2
3
SHUTDOWN  
ROUT  
+
RIN-  
VDD  
LOUT  
+
4
5
6
17  
16  
15  
LIN-  
PVDD  
RIN+  
PVDD  
ROUT  
GND  
7
8
9
-
14  
13  
LOUT  
-
LIN+  
12 NC  
GND  
BYPASS 10  
11  
„
PIN DESCRIPTION  
PIN NO.  
PIN NAME  
GND  
I/O  
DESCRIPTION  
1,11 13,20  
Ground  
2
3
GAIN0  
GAIN1  
I
I
Bit 0 of gain control  
Bit 1 of gain control  
Positive output for left channel  
4
LOUT  
+
O
I
5
LIN-  
PVDD  
RIN+  
Negative differential input for left channel  
Supply voltage  
6,15  
7
I
I
Positive differential input for right channel  
Negative output for left channel  
Positive differential input for left channel  
Tap to voltage divider for internal mid supply bias generator  
Nothing connection  
8
LOUT  
-
O
I
9
LIN+  
BYPASS  
NC  
10  
12  
14  
16  
17  
18  
19  
ROUT  
VDD  
-
O
Negative output for right channel  
Supply voltage  
RIN-  
I
O
I
Negative differential input for right channel  
Positive output for right channel  
In shutdown mode when held low  
ROUT  
+
SHUTDOWN  
UNISONIC TECHNOLOGIES CO., LTD  
2 of 11  
QW-R502-185.A  
www.unisonic.com.tw  
PA3431  
CMOS IC  
„
ABSOLUTE MAXIMUM RATINGS  
PARAMETER  
SYMBOL  
VCC  
RATINGS  
6
UNIT  
V
Supply Voltage  
Power Dissipation (TA≤25℃)  
PD  
2.7  
W
℃
Junction Temperature  
TJ  
+150  
℃
Operating Temperature  
Storage Temperature Range  
TOPR  
TSTG  
-40 ~ +85  
-65 ~ +150  
℃
Note: Absolute maximum ratings are those values beyond which the device could be permanently damaged.  
Absolute maximum ratings are stress ratings only and functional device operation is not implied.  
„
ELECTRICAL CHARACTERISTICS (Ta=25℃, unless otherwise specified)  
PARAMETER  
SYMBOL  
TEST CONDITIONS  
MIN TYP MAX UNIT  
DC ELECTRICAL CHARACTERISTICS  
Supply Voltage  
VDD  
VIH  
4.5  
2
5
5.5  
V
V
High-Level Input Voltage  
SHUTDOWN, GAIN0, GAIN1  
SHUTDOWN, GAIN0, GAIN1  
VDD= 5V,Gain = 2  
Low-Level Input Voltage  
VIL  
0.8  
50  
11  
V
DC Differential Output Voltage  
Supply Current in Mute Mode  
Supply Current, Shutdown Mode  
VO(DIFF)  
IDD  
5
mV  
mA  
VDD= 5V, Stereo BTL  
VDD= 5V  
7.5  
160  
IDD(SD)  
300 µA  
AC ELECTRICAL CHARACTERISTICS (VDD = 5.0V, RL = 4Ω)  
THD =1%, BTL, RL= 4ꢀ, G=-2V/V  
2
THD =1%, BTL, RL= 8ꢀ, G=-2V/V  
THD =10%, BTL, RL= 4ꢀ, G=-2V/V  
THD = 10%, BTL,RL= 8ꢀ, G=-2V/V  
POUT= 1.6W, BTL,RL= 4ꢀ, G=-2V/V  
POUT= 1W, BTL, RL= 8ꢀ, G=-2V/V  
THD = 5%  
1.2  
2.5  
1.6  
100  
60  
Output Power  
POUT  
W
Total Harmonic Distortion Plus Noise  
THD+N  
m%  
Max Output Power Bandwidth  
Power Supply Ripple Rejection  
Channel-to-Channel  
BOM  
15  
kHz  
dB  
PSRR  
F=1kHz,BTL,G=-2V/V, CBYP=1µF  
68  
f = 1kHz  
80  
90  
45  
dB  
Output Separation  
Signal-to-Noise Ratio  
SNR  
VN  
POUT= 500mW, BTL, G=-2V/V  
BTL, G=-2V/V, A Weighted filter  
dB  
µV  
(rms)  
Output Noise Voltage  
Note:Output power is measured at the output terminals of the IC at 1kHz.  
UNISONIC TECHNOLOGIES CO., LTD  
3 of 11  
QW-R502-185.A  
www.unisonic.com.tw  
PA3431  
CMOS IC  
„
TYPICAL APPLICATION CIRCUIT  
1
20  
GND  
GND  
2
3
4
19  
18  
17  
16  
TO SYSTEM CONTROL  
RIGHT LINE INPUT SIGNAL  
GAIN0  
GAIN1  
SHUTDOWN  
ROUT+  
LEFT LINE INPUT SIGNAL  
SPEAKER  
L
CRIN-  
C3  
LOUT  
+
RIN-  
1µF  
CLIN-  
VDD  
5
6
7
8
9
UTC PA3431  
VDD  
LIN-  
C1 1µF  
15  
14  
VDD  
PVDD  
PVDD  
RIN+  
R
CRIN+  
ROUT-  
C4 1µF  
SPEAKER  
13  
12  
11  
LOUT  
LIN+  
-
GND  
NC  
CLIN+  
CS1  
1µF  
CS2  
10µF  
C2 1µF  
CB  
C5 1µF  
10  
BYPASS  
GND  
Typical Application Circuit Using Single-Ended Inputs  
UNISONIC TECHNOLOGIES CO., LTD  
4 of 11  
QW-R502-185.A  
www.unisonic.com.tw  
PA3431  
CMOS IC  
„
TYPICAL APPLICATION CIRCUIT(Cont.)  
1
20  
LEFT  
GND  
GND  
NEGATIVE  
DIFFERENTIAL  
INPUT  
2
3
4
19  
18  
17  
16  
TO SYSTEM CONTROL  
GAIN0  
GAIN1  
SHUTDOWN  
SIGNAL  
ROUT  
+
SPEAKER  
LEFT  
RIGHT  
CRIN-  
C3  
NEGATIVE  
DIFFERENTIAL  
INPUT  
LOUT+  
RIN-  
1µF  
CLIN-  
VDD  
SIGNAL  
5
6
7
8
9
UTC PA3431  
VDD  
LIN-  
C1 1µF  
VDD  
15  
14  
PVDD  
RIGHT  
PVDD  
RIN+  
POSITIVE  
DIFFERENTIAL  
INPUT  
CRIN+  
ROUT  
-
SIGNAL  
C4 1µF  
SPEAKER  
RIGHT  
13  
12  
11  
LOUT  
-
GND  
NC  
LEFT  
CLIN+  
POSITIVE  
DIFFERENTIAL  
INPUT  
CS1  
1µF  
CS2  
10µF  
LIN+  
C2 1µF  
CB  
C5 1µF  
10  
SIGNAL  
BYPASS  
GND  
Typical Application Circuit Using Differential Inputs  
UNISONIC TECHNOLOGIES CO., LTD  
5 of 11  
QW-R502-185.A  
www.unisonic.com.tw  
PA3431  
CMOS IC  
„
APPLICATION INFORMATION  
Shutdown Mode Operating  
SHUTDOWN PIN INPUT  
THE AMPLIFIER’S OUTPUT  
LOW  
MUTE(the current of this device will be reduced to 160µA )  
HIGH  
BTL  
OTHERS  
Don’t Care  
CI(Input Capacitor)  
The value of CI is important to consider as it directly affects the bass performance of the application circuit. When CI  
is required to allow the amplifier to bias the input signal to the proper dc level for optimum operation, it’s value can be  
calculate by this equation:  
CI=1/(2πRIFC)  
RI:Input Impedance  
FC:High-pass Filter’s Frequency  
The low leakage tantalum or ceramic capacitors are suggested to be used as the input coupling capacitors, because  
of the small leakage current of the input ca-pacitors will cause the dc offset voltage at the input to the amplifier that  
reduces the operation headroom, especially at the high gain applications. It is important to let the positive side  
connecting to the higher dc level of the application when using the polarized capacitors.  
Gain setting (VS GAIN0, GAIN1 and RI)  
Gain setting is determined by GAIN0 and GAIN1. The gains listed in the next table are realized by changing the taps  
on the input resistors inside the amplifier which will cause the internal input impedance(R I) to be dependent on the  
gain setting as we can see listed in the next table.  
AV(dB)  
6
GAIN0  
GAIN1  
RI(kꢀ)  
90  
0
0
1
1
0
1
0
1
10  
70  
15.6  
21.6  
45  
30  
UNISONIC TECHNOLOGIES CO., LTD  
6 of 11  
QW-R502-185.A  
www.unisonic.com.tw  
PA3431  
CMOS IC  
„
TYPICAL CHARACTERISTICS  
Total Harmonic Distortion Plus Noise vs.  
Frequency  
Total Harmonic Distortion Plus Noise vs.  
Frequency  
10  
5
10  
5
VDD=5V  
VDD=5V  
RL=3ꢀ  
AV=6dB  
RL=3ꢀ  
PoUT=1.75W  
AV=21.6dB  
2
2
1
1
0.5  
0.5  
POUT=0.5W  
AV=15.6dB  
0.2  
0.1  
0.2  
0.1  
POUT=1W  
AV=10dB  
AV=6dB  
0.05  
0.05  
0.02  
0.01  
0.02  
0.01  
POUT=1.5W  
20 50 100 200 5001k 2k 5k 10k  
20 50 100 200 5001k 2k 5k 10k  
20k  
20k  
Frequency (Hz)  
Frequency (Hz)  
UNISONIC TECHNOLOGIES CO., LTD  
7 of 11  
QW-R502-185.A  
www.unisonic.com.tw  
PA3431  
CMOS IC  
„
TYPICAL CHARACTERISTICS(Cont.)  
UNISONIC TECHNOLOGIES CO., LTD  
8 of 11  
QW-R502-185.A  
www.unisonic.com.tw  
PA3431  
CMOS IC  
„
TYPICAL CHARACTERISTICS(Cont.)  
Total Harmonic Distortion Plus Noise vs.  
Frequency  
Total Harmonic Distortion Plus Noise vs.  
Frequency  
10  
5
10  
5
VDD=5V  
RL=8ꢀ  
AV=6dB  
VDD=5V  
RL=8ꢀ  
2
2
POUT=1W  
1
0.5  
1
0.5  
AV=21.6dB  
AV=15.6dB  
POUT=0.25W  
0.2  
0.1  
0.2  
0.1  
POUT=1W  
AV=6dB  
0.05  
0.05  
POUT=0.5W  
0.02  
0.01  
0.02  
0.01  
AV=10dB  
20 50 100 200 5001k 2k 5k 10k  
20k  
20 50 100 200 5001k 2k 5k 10k  
20k  
Frequency (Hz)  
Frequency (Hz)  
UNISONIC TECHNOLOGIES CO., LTD  
9 of 11  
QW-R502-185.A  
www.unisonic.com.tw  
PA3431  
CMOS IC  
„
TYPICAL CHARACTERISTICS(Cont.)  
Output Noise vs. Frequency  
VDD=5V  
RL=4ꢀ  
AV=6dB  
Output Power vs. Load Resistance  
500u  
400  
300u  
2.5  
2
VDD=5V  
THD+N=1%  
Each Channel  
200u  
A-Weighted filter  
100u  
1.5  
70u  
60u  
50u  
40u  
1
30u  
0.5  
20u  
10u  
0
0
20 50 100 200 5001k 2k 5k 10k  
Frequency (Hz)  
10  
20  
30  
20k  
40  
Load Resistance (Ω)  
Power Dissipation vs. Output Power  
1.8  
RL=3Ω  
1.6  
1.4  
1.2  
1
RL=4Ω  
VDD=5V  
Each Channel  
0.8  
0.6  
0.4  
RL=8Ω  
0.2  
0
0
0.5  
1
1.5  
2
2.5  
Output Power (W)  
UNISONIC TECHNOLOGIES CO., LTD  
10 of 11  
QW-R502-185.A  
www.unisonic.com.tw  
PA3431  
CMOS IC  
UTC assumes no responsibility for equipment failures that result from using products at values that  
exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or  
other parameters) listed in products specifications of any and all UTC products described or contained  
herein. UTC products are not designed for use in life support appliances, devices or systems where  
malfunction of these products can be reasonably expected to result in personal injury. Reproduction in  
whole or in part is prohibited without the prior written consent of the copyright owner. The information  
presented in this document does not form part of any quotation or contract, is believed to be accurate  
and reliable and may be changed without notice.  
UNISONIC TECHNOLOGIES CO., LTD  
11 of 11  
QW-R502-185.A  
www.unisonic.com.tw  

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