UNISONIC TECHNOLOGIES CO., LTD
PA3212
2.6W STEREO AUDIO
AMPLIFIER WITH FOUR
SELECTABLE GAIN SETTINGS
AND MUX CONTROL
DESCRIPTION
As operating on a single 5V supply, the UTC
PA3212
is
capable of delivering 2.6W of output power per channel into 3Ω
loads. In Bridge-Tied Load (BTL) mode the UTC
PA3212
has less
than 1% THD+N, and it also has less than 0.65% THD+N across
its specified frequency range when driving 1 W into 8-Ω speakers.
Way of two terminals (GAIN0 and GAIN1) can configure and
control the amplifier gain. It also provides BTL gain settings of 2,
6, 12 and 24 V/V.
Other features included that the SHDN mode is provided to
disable UTC
PA3212
for the low current consumption applications
and the current consumption can be reduced to typically 150µA.
CMOS IC
Lead-free:
PA3212L
Halogen-free: PA3212G
FEATURES
* Output power at 0.65% THD+N, V
DD
=5V(TYP)
–2.6W/CH
(typical) into a 3Ω load
–1.0W/CH
(typical) into a 8Ω load
* Bridge-tied load (BTL) supported
* Gain control internally
* Differential Input fully
* Depop circuitry Inside
* Shutdown protection
* Stereo input
ORDERING INFORMATION
Normal
PA3212-N24-R
PA3212-N24-T
Ordering Number
Lead Free
PA3212L-N24-R
PA3212L-N24-T
Halogen Free
PA3212G-N24-R
PA3212G-N24-T
Package
HTSSOP-24
HTSSOP-24
Packing
Tape Reel
Tube
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Copyright © 2009 Unisonic Technologies Co., Ltd
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QW-R502-310.A
PA3212
PIN CONFIGURATION
CMOS IC
PIN DESCRIPTION
PIN NO.
1,12,13,24
11
2
3
5
6
7,18
8
10
14
17
15
19
20
23
22
4
9
16
21
PIN NAME
GND
BYPASS
GAIN0
GAIN1
LLINEIN
LHPIN
PV
DD
RIN
LIN
PC-BEEP
HP/
LINE
SE/
BTL
V
DD
RHPIN
RLINEIN
SHUTDOWN
L
OUT+
L
OUT-
R
OUT-
R
OUT+
I/O
DESCRIPTION
Ground.
Connected to voltage divider
For gain control: Bit 0
For gain control: Bit 1
Line input for Left channel, available when pin15 is held low.
Headphone input Left channel, available when pin15 is held high.
Power supply voltage.
Differential input for right channel. And for single-ended inputs is also AC
ground.
Differential input for Left channel. And for single-ended inputs is also AC
ground.
PC-BEEP mode input. When at least eight continuous
>1-V
PP
square
waves is input to this pin, PC-BEEP is enabled.
Input of MUX control. Being high to select the inputs of Pin6, 20, and low
to select inputs of PIN 5, 23.
Low for BTL mode, high for SE mode.
Analog V
DD
supply voltage
Right channel headphone input, selected when pin17 is held high.
Headphone input right channel, available when pin17 is held low.
In shutdown mode when held low, expect PC-BEEP remains active.
In BTL mode: left channel + output; In SE mode: left channel + output
In BTL mode: left channel - output; In SE mode: high impedance
In BTL mode: right channel + output; In SE mode: right channel + output
In BTL mode: right channel - output; In SE mode: high impedance
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UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
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QW-R502-310.A
PA3212
BLOCK DIAGRAM
RHPIN
RLINEIN
CMOS IC
R
MUX
Volume
Control
R
OUT+
GAIN0
GAIN1
R
IN
Volume
Control
Depop
Circuitry
PV
DD
V
DD
BYPASS
SHUTDOWN
GND
R
OUT–
Power
Management
LHPIN
LLINEIN
L
MUX
Volume
Control
L
OUT+
L
IN
PC-BEEP
SE/BEL
HP/LINE
PC
Beep
MUX
Control
Volume
Control
L
OUT–
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QW-R502-310.A
PA3212
ABSOLUTE MAXIMUM RATING
PARAMETER
CMOS IC
SYMBOL
RATINGS
Supply Voltage
V
DD
6
Input Voltage
V
IN
-0.3 ~ V
DD
~ +0.3
Junction Temperature
T
J
+150
Operating Temperature
T
OPR
-40 ~ +85
Storage Temperature
T
STG
-65 ~ +85
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.
UNIT
V
V
°С
°С
°С
ELECTRICAL CHARACTERISTICS
(T
a
= 25°С, unless otherwise specified.)
PARAMETER
SYMBOL
DC ELECTRICAL CHARACTERISTICS
Supply Voltage
V
DD
High-Level Input voltage
V
IH
TEST CONDITIONS
MIN
4.5
SHUTDOWN
SE/BTL, HP/LINE, GAIN0, GAIN1
SHUTDOWN
GAIN0, GAIN1
SE/
BTL
, HP/
LINE
V
IN
=0V,Gain=2V/V
BTL Mode
SE Mode
V
DD
=5V
V
DD
=5.5V, V
IN
=V
DD
V
DD
=5.5V, V
IN
=0V
2
0.8×V
DD
TYP
5
MAX
5.5
UNIT
V
V
V
0.8
0.4
×
V
DD
0.6
×
V
DD
V
V
V
mV
mA
mA
µA
nA
nA
°С
W
%
kHz
dB
µV
RMS
µV
RMS
dB
Low-Level Input voltage
DC Differential Output Voltage
Supply Current in Mute Mode
V
IL
V
OUT(DIFF)
I
DD
Supply Current, Shutdown Mode
I
DD(SD)
High-Level Input Current
|I
IH
|
Low-Level Input Current
|I
IL
|
Operating Free-Air Temperature
T
a
-40
AC ELECTRICAL CHARACTERISTICS (VDD = 5.0V, RL = 8Ω, unless otherwise noted )
THD=1%, BTL, R
L
=3Ω, G=2V/V
Output Power
P
OUT
THD=10%, BTL, R
L
=3Ω, G=2V/V
Total Harmonic Distortion Plus Noise THD+N P
OUT
=1W, BTL, R
L
= 8Ω, G=2V/V
THD= 5%
Max Output Power Bandwidth
B
OM
Power Supply Ripple Rejection
PSRR f=1kHz, BTL, G=2V/V, C
BYP
=0.47µF
C
BYP
=0.47µF,BTL, G=2V/V
Output Noise Voltage
eN
C
BYP
=0.47µF, SE, G=2V/V
Signal-to-Noise Ratio
SNR
Note: Output power is measured at the output terminals of the IC at 1kHz.
6
3
150
25
8
4
300
900
900
85
2.05
2.6
0.65
15
72
20
18
105
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
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QW-R502-310.A
PA3212
TYPICAL APPLICATION CIRCUITS
CMOS IC
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
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QW-R502-310.A
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