UNISONIC TECHNOLOGIES CO., LTD
PA4871
1.1W AUDIO POWER AMPLIFIER
WITH SHUTDOWN MODE
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.
1
CMOS IC
DFN-8(3x3)
SOP-8
FEATURES
* Output power at 0.5% THD+N
Supply voltage:5V
Delivering 1.1W into a 8Ω load
* With shutdown mode
* Stable unity-gain.
MSOP-8
ORDERING INFORMATION
Ordering Number
Lead Free
PA4871L-K08-3030-R
PA4871L-S08-R
PA4871L-S08-T
PA4871L-SM1-R
PA4871L-SM1-T
Halogen Free
PA4871G-K08-3030-R
PA4871G-S08-R
PA4871G-S08-T
PA4871G-SM1-R
PA4871G-SM1-T
Package
DFN-8(3×3)
SOP-8
SOP-8
MSOP-8
MSOP-8
Packing
Tape Reel
Tape Reel
Tube
Tape Reel
Tube
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Copyright © 2012 Unisonic Technologies Co., Ltd
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QW-R502-232.F
PA4871
PIN CONFIGURATION
CMOS IC
SHUTDOWN
SHUTDOWN
BYPASS
+IN
-IN
1
2
3
4
Top
View
8
7
6
5
V
OUT
2
GND
V
DD
V
OUT
1
-IN
BYPASS
+IN
1
2
3
4
8
7
6
5
V
OUT
2
GND
V
DD
V
OUT
1
DFN-8(3×3)
SOP-8 / MSOP-8
PIN DESCRIPTION
PIN NO
1
2
3
4
5
6
7
8
PIN NAME
SHUTDOWN
BYPASS
+IN
-IN
V
OUT1
V
DD
GND
V
OUT2
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
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
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QW-R502-232.F
PA4871
BLOCK DIAGRAM
CMOS IC
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
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QW-R502-232.F
PA4871
ABSOLUTE MAXIMUM RATING
PARAMETER
CMOS IC
SYMBOL
RATINGS
UNIT
Supply Voltage
V
DD
6
V
Input Voltage
V
IN
-0.3~V
DD
+0.3
V
Power Dissipation
P
D
Internally Limited
W
Junction Temperature
T
J
150
°С
Operating Temperature
T
OPR
-40~+85
°С
Storage Temperature
T
STG
-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
DFN-8(3×3)
Junction to Ambient
θ
JA
SOP-8/MSOP-8
DFN-8(3×3) (Note)
Junction to Case
θ
JC
SOP-8/MSOP-8
Note: Surface mounted on 1 in
2
copper pad of FR4 board
RATINGS
59
140
4.3
35
UNIT
°С/W
°С/W
°С/W
°С/W
ELECTRICAL CHARACTERISTICS
(T
A
=25°С, V
DD
=5V, R
L
=8Ω, unless otherwise specified)
PARAMETER
SYMBOL
DC ELECTRICAL CHARACTERISTICS
Supply Voltage
V
DD
DC Differential Output Voltage
V
OUT(DIFF)
Mute Mode
Supply Current
I
DD
Shutdown Mode
Output Power
Total Harmonic Distortion+Noise
Power Supply Ripple Rejection
P
OUT
THD+N
PSRR
TEST CONDITIONS
MIN
2.0
V
IN
=0V
V
IN
=0V,I
OUT
=0A
V
PIN1
=V
DD
THD=0.5%, f
IN
=1kHz
THD=10%, f
IN
=1kHz
P
OUT
=1W
RMS
,
20Hz<f
IN
<20kHz,
G=2V/V
V
DD
=4.9V to 5.1V
TYP
5
5
6.5
0.6
1.10
1.5
0.25
65
MAX
5.5
50
10.0
2
UNIT
V
mV
mA
µA
W
W
%
dB
1.0
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
4 of 6
QW-R502-232.F
PA4871
TYPICAL APPLICATION CIRCUIT
CMOS IC
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
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QW-R502-232.F
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