Tel:886-2-66296288
Fax:886-2-29174598
URL:http://www.princeton.com.tw
2.2W×2 Class-D Audio Power Amplifier
Preliminary
PT2332
DESCRIPTION
The PT2332 is a CLASS-D power amplifier designed for audio equipments, maximum output power
can reach up to 2.2W x 2 (VDD = 5V, RL = 4Ω, THD = 10%). The PT2332 composed of exclusively
designed CLASS-D circuitry (patented) by PTC, along with the most advanced semi-conductor
technology. When compared to the traditional CLASS-AB amplifiers, the PT2332’s has a much higher
efficiency (> 80%), low heat dissipation, and produces superior audio quality. PT2332’s external
circuitry is simple and easily accessible, and consists of flawless self-protection capabilities. The
chip’s packaging is small, thus it occupies an insignificant amount of space on the circuit board;
therefore, making it the predominant choice when it comes to audio amplifiers.
FEATURES
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CMOS Technology
Stereo differential analogue input
Maximum output power 2.2W(4Ω) × 2 @ THD=10%
Output low-pass LC filter is not necessary
Preset 2 voltage gain selection (20dB and 26dB)
Contains shutdown function
POP noise free in shutdown changed and power ON/OFF period
Built-in short circuit protection
Built-in overheat protection
Low harmonic distortion (0.1%), superior sound quality
High efficiency (8Ω load > 85%), low heat dissipation
SOP-16 pins and SSOP-16 pins, miniature packages
APPLICATIONS
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Portable Media Player
Portable DVD Player
LCD Monitor
Small multimedia speakers
Hand-free phone
Laptop
Other audio applications
PT2332 PRE1.0
-1-
September, 2006
Tel:886-2-66296288
Fax:886-2-29174598
URL:http://www.princeton.com.tw
2.2W×2 Class-D Audio Power Amplifier
Preliminary
PT2332
PIN CONFIGURATION
1
2
3
4
5
6
7
8
INRP
INRN
VCC
GAIN
/SD
GND
INLN
INLP
OUTRP 16
GNDR
VDDR
15
14
OUTRN 13
OUTLN 12
VDDL
GNDL
OUTLP
11
10
9
PIN DESCRIPTION
Pin
I/O
Symbol
Function
Pin
I/O
Symbol
Function
1
I
INRP
Right channel input (+) 9
O
OUTLP
Left channel output (+)
2
I
INRN
Right channel input (-) 10 Power GNDL
Ground (Left channel)
3 Power
VCC
Power input
11 Power VDDL
Left channel power input
4
I
GAIN
Gain setting
12
O
OUTLN
Left channel output (-)
5
I
/SD
Shutdown
13
O
OUTRN Right channel output (-)
6 Power
GND
Ground
14 Power VDDR Right channel power input
7
I
INLN
Left channel input (-)
15 Power GNDR
Ground (Right channel)
8
I
INLP
Left channel input (+) 16
O
OUTRP Right channel output (+)
PT2332 PRE1.0
-2-
September, 2006
Tel:886-2-66296288
Fax:886-2-29174598
URL:http://www.princeton.com.tw
2.2W×2 Class-D Audio Power Amplifier
Preliminary
PT2332
APPICATION CIRCUIT DIAGRAM
(1) DIRECT DRIVING LOAD
VCC
C9
10uF
P1
AINR
C3
C2
0.22uF
1
2
3
4
5
/SD
C4
P2
AINL
0.22uF C5
0.22uF
6
7
8
IC1
INRP
INRN
VCC
GAIN
/SD
GND
INLN
INLP
PT2332
OUTRP
GNDR
VDDR
OUTRN
OUTLN
VDDL
GNDL
OUTLP
16
15
14
13
12
11
10
9
C7
1uF
P6
OUTLP
C6
1uF
P4
OUTRN
P5
OUTLN
P3
OUTRP
0.22uF C8
GAIN
0.1uF
(The system must have well radiation shielded in direct driving load)
(2) OPERATION USING OUTPUT FILTER
VCC
C9
10uF
P1
AINR
C3
C2
0.22uF
1
2
3
4
5
/SD
C4
P2
AINL
0.22uF C5
0.22uF
6
7
8
IC1
INRP
INRN
VCC
GAIN
/SD
GND
INLN
INLP
PT2332
OUTRP
GNDR
VDDR
OUTRN
OUTLN
VDDL
GNDL
OUTLP
16
15
14
13
12
11
10
9
C7
1uF
L4
22uH
C6
1uF
L2
L3
22uH
L1
22uH
C10
0.33uF
C11
0.33uF P4
OUTRN
P5
OUTLN
C12
0.33uF
C13
0.33uF
P3
OUTRP
0.22uF C8
GAIN
0.1uF
22uH
P6
OUTLP
PT2332 PRE1.0
-3-
September, 2006
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