PA3431-N20-T [UTC]
2W STEREO AUDIO AMPLIFIER; 2W立体声音频放大器型号: | PA3431-N20-T |
厂家: | Unisonic Technologies |
描述: | 2W STEREO AUDIO AMPLIFIER |
文件: | 总11页 (文件大小:262K) |
中文: | 中文翻译 | 下载: | 下载PDF数据表文档文件 |
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
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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
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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.
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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
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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
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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
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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)
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PA3431
CMOS IC
TYPICAL CHARACTERISTICS(Cont.)
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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)
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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)
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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.
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