Datasheet

UNISONIC TECHNOLOGIES CO., LTD
PA4871
CMOS IC
1.1W AUDIO POWER AMPLIFIER
WITH SHUTDOWN MODE

SOP-8
DESCRIPTION
As a mono bridged power amplifier which is operating on a single
5V supply, the UTC PA4871 is capable of delivering 1.1W of output
power per channel into 8Ω loads with less than 0.5% THD+N.
The UTC PA4871 is optimally suited for low-power portable
applications because of the it do not require output coupling
capacitors, bootstrap capacitors or snubber networks.
By using external gain-setting resistors, the closed loop response
of the unity-gain stable PA4871 can be configured.

MSOP-8
1
DFN-8(3x3)
FEATURES
* Output power at 0.5% THD+N
Supply voltage:5V
Delivering 1.1W into a 8Ω load
* With shutdown mode
* Stable unity-gain.

ORDERING INFORMATION
Ordering Number
PA4871G-S08-R
PA4871G-S08-T
PA4871G-SM1-R
PA4871G-SM1-T
PA4871G-K08-3030-R
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Copyright © 2016 Unisonic Technologies Co., Ltd
Package
SOP-8
SOP-8
MSOP-8
MSOP-8
DFN-8(3×3)
Packing
Tape Reel
Tube
Tape Reel
Tube
Tape Reel
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PA4871

CMOS IC
MARKING
Package
MARKING
SOP-8
MSOP-8
DFN-8(3×3)

PIN CONFIGURATION

PIN DESCRIPTION
PIN NO
1
2
3
4
5
6
7
8
PIN NAME
SHUTDOWN
BYPASS
+IN
-IN
VOUT1
VDD
GND
VOUT2
DESCRIPTION
Shutdown control input pin.
Connected to a bypass capacitor.
+ pin of input signal.
- pin of input signal.
Output pin1
Supply voltage
GND
Output pin2
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PA4871

CMOS IC
BLOCK DIAGRAM
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PA4871

CMOS IC
ABSOLUTE MAXIMUM RATING
PARAMETER
SYMBOL
RATINGS
UNIT
Supply Voltage
VDD
6
V
Input Voltage
VIN
-0.3 ~ VDD+0.3
V
Power Dissipation
PD
Internally Limited
W
Junction Temperature
TJ
150
°С
Operating Temperature
TOPR
-40 ~ +85
°С
Storage Temperature
TSTG
-65 ~ +150
°С
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.

THERMAL DATA
PARAMETER
SYMBOL
SOP-8
Junction to Ambient
θJA
MSOP-8
DFN-8(3×3)
SOP-8
Junction to Case
θJC
MSOP-8
DFN-8(3×3)
Note: Surface mounted on 1 in 2 copper pad of FR4 board

RATINGS
140
210
59
35
56
4.3 (Note)
UNIT
°С/W
°С/W
°С/W
°С/W
°С/W
°С/W
ELECTRICAL CHARACTERISTICS (TA=25°С, VDD=5V, RL=8Ω, unless otherwise specified)
PARAMETER
SYMBOL
DC ELECTRICAL CHARACTERISTICS
Supply Voltage
VDD
DC Differential Output Voltage
VOUT(DIFF)
Mute Mode
Supply Current
IDD
Shutdown Mode
Output Power
POUT
Total Harmonic Distortion+Noise
THD+N
Power Supply Ripple Rejection
PSRR
TEST CONDITIONS
VIN=0V
VIN=0V,IOUT=0A
VPIN1=VDD
THD=0.5%, fIN=1kHz
THD=10%, fIN=1kHz
POUT=1WRMS,
20Hz<fIN<20kHz, G=2V/V
VDD=4.9V to 5.1V
UNISONIC TECHNOLOGIES CO., LTD
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MIN
TYP
MAX
UNIT
2.0
5
5
6.5
0.6
1.10
1.5
5.5
50
10.0
2
V
mV
mA
µA
W
W
1.0
0.25
%
65
dB
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PA4871
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CMOS IC
TYPICAL APPLICATION CIRCUIT
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PA4871
CMOS IC
TYPICAL CHARACTERISTICS
Output Waveform (v)

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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www.unisonic.com.tw
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