DESCRIPTION APPLICATIONS FEATURES BLOCK DIAGRAM

PT2334
Stereo 2W Class-D Amplifier with Built-In
Audio Processor
DESCRIPTION
FEATURES
 Supply Voltage: 3.7~6V
 Differential input power amplifier for improved
CMRR.
 2W X 2 Class-D power amplifier (VDD=5V,
RL=4Ω)
 70mW X 2 Class-AB headphone driver (RL=32Ω)
 BASS and TREBLE control
 32 steps volume controller
 4 Inputs selection
 Audio line out (same level with volume and tone)
 Built-In 16 bits DAC for digital audio sources
 Pop-Free circuitry eliminates unpleasant noises
during power ON/OFF.
 Low power shutdown
 Over Heat/Over current protection circuitry
2
 Controlled by I C interface
 High Power CMOS processing
 Available in 48 Pins, LQFP
The PT2334 is an integrated stereo 2W Class-D
amplifier accompany with a Class-AB headphone
driver. The input interface accepts both analog and
digital audio sources; the chip included a 16-bit DAC to
convert digital audio source to analog signal. The
signal process is basically in analog domain to
maintain the high performances and low power
consumption. The PT2334 also provide very useful
multi-sources selection (Up to 4 sources) and tone
control functions, thanks for the advanced CMOS
technology now we could combine both audio
processing and amplification into a single chip. The
2
whole chip functions are controlled via I C bus.
APPLICATIONS





Flat panel display and TV
Portable media player
Portable player ducking system
Digital photo frame
Other audio applications
BLOCK DIAGRAM
SDI
LRCI
BCKI
R4
SDI
LRCI
BCKI
RT
TREBLE
RCH
R4
R3
R3
R2
R2
R1
R1
DACRO
RB2
RB1
ROUT
HVDD
RHPO
HPR
16-Bit
DAC
R-VOL
RCH 2W
OE
SDA
SCL
Power
Management
RVDD
CLASS-D
RGND
LCH 2W
LGND
ROP
SPR
RON
Vref
SD
OE
SDA
SCL
HPEN
Vref
CLASS-D
L-VOL
Control
Interface
LVDD
LON
LOP
HPL
L1
HPEN
GNDA
DACLO
L1
L2
TREBLE
LCH
L4
SD
VDDA
L3
AGND
Bypass
L2
AVDD
RINN
BASS
RCH
Vref
BYPASS
RINP
L3
L4
LT
BASS
LCH
LB2
LB1
LOUT
HGND
LHPO
LINP
LINN
Tel: 886-66296288‧Fax: 886-29174598‧ http://www.princeton.com.tw‧2F, No. 233-1, Baociao Rd., Sindian Dist., New Taipei City 23145, Taiwan
SPL
PT2334
APPLICATION CIRCUIT
R1
220
C19
2.2uF
R3
8.2K
P1
1u
1uF
68n
C21 1uF
C13
C20
C2
68n
RINN
AVDD
OE
SD
SDA
SCL
ROUT
RB1
RB2
NC
47
15
DACRO
RON
46
16
SDI
RGND
45
17
LRCI
RVDD
44
L3
19
NC
LOP
42
20
DACLO
LVDD
41
FB
C27
10uF
1uF
L3
L4
C32
1nF
U1
C33
1nF
RSPK
C34
1nF
U2
C35
1nF
LSPK
FB
FB
1uF
L5
FB
LINN
LB1
LB2
LT
33
28
27
26
25
36
37
35
LINP
RHPO
L4
AGND
24
32
38
31
39
NC
HGND
LON
L3
30
L2
23
LHPO
22
29
40
HPEN
LGND
LOUT
L1
34
C12 1u
L2
C24
21
HVDD
BYPASS
L4
1u
P2
+5V
C23
43
C11
L1
1
2
3
4
5
6
7
8
9
RT
R1
ROP
C10 1u
CVBS
48
BCKI
R4
GND
C31
100uF
FB
RINP
18
1u
C26
10uF
L6
R3
C9
AUDIO
14
10
1u
R2
C1
1u
PC(VGA)
AUDIO
C8
L2
13
R4
R2
TV TUNER
1u
2n
11
R3
C7
C22
1uF
FB
12
IC1
PT2334
LOUT
1u
ROUT
C16
C5
C6
LINE
OUT
HOST MCU
R9
2K
R7
1u
C28
C14
C29
C25
1uF
R4
8.2K
R11
47K
R12
47K
1K
220uF
R5
100K
R13
47K
C30
220uF
R2
R8
1
3
11
10
2
U3
Headphone
1K
C18
2.2uF
220
V1.4
2.2uF
68n
68n
2n
HDMI Audio
C4
C3
C17
DSP or
C15
1u
2
R6
R10
100K
2K
September 2015
PT2334
ORDER INFORMATION
Valid Part Number
PT2334-LQ
Package Type
48 Pins, LQFP
Top Code
PT2334-LQ
PIN CONFIGURATION
V1.4
3
September 2015
PT2334
PIN DESCRIPTION
Pin Name
RINN
AVDD
OE
I/O
I
P
I
SD
I
SDA
SCL
ROUT
RB1
RB2
RT
R4
R3
R2
R1
DACRO
SDI
LRCI
BCKI
NC
DACLO
L1
L2
L3
L4
LT
LB2
LB1
LOUT
HPEN
LHPO
HGND
BYPASS
HVDD
RHPO
AGND
LINN
LINP
NC
LON
LGND
LVDD
LOP
ROP
RVDD
RGND
RON
NC
RINP
I
I
O
I
O
I
I
I
I
I
O
I
I
I
O
I
I
I
I
I
I
O
O
I
O
P
P
P
O
P
I
I
O
P
P
O
O
P
P
O
I
V1.4
Description
Pin No.
Negative input of right channel Class-D amp
1
Power input for DAC and internal circuits
2
3
Output Enable setting, connect a 0.22F cap to GND.
Shutdown
Sets to low level will turn off whole chip and pull up to High level is back to normal
4
operation.
2
I C bus data input
5
2
I C bus clock input
6
Right channel line out
7
Capacitor 1 for right channel Bass controller
8
Capacitor 2 for right channel Bass controller
9
Capacitor for right channel Treble controller
10
Input 4 of right channel
11
Input 3 of right channel
12
Input 2 of right channel
13
Input 1 of right channel
14
Right channel DAC output
15
Serial data input of DAC
16
Channel clock input of DAC
17
Bit clock input of DAC
18
No connect
19
Left channel DAC output
20
Input 1 of left channel
21
Input 2 of left channel
22
Input 3 of left channel
23
Input 4 of left channel
24
Capacitor for left channel Treble controller
25
Capacitor 2 for left channel Bass controller
26
Capacitor 1 for left channel Bass controller
27
Left channel line out
28
Headphone sense input
29
Left channel headphone driver output.
30
Ground of headphone driver.
31
Bypass cap for Internal Voltage Reference, a 2.2µF cap is recommended.
32
Power input for headphone amplifier
33
Right channel headphone driver output
34
Ground for DAC and internal circuits
35
Negative input of left channel Class-D amp
36
Positive input of left channel Class-D amp
37
No connect
38
Negative output of left channel Class-D amp
39
Power ground of left channel Class-D amp
40
Power input of left channel Class-D amp
41
Positive output of left channel Class-D amp
42
Positive output of right channel Class-D amp
43
Power input of right channel Class-D amp
44
Power ground of right channel Class-D amp
45
Negative output of right channel Class-D amp
46
No connect
47
Positive input of right channel Class-D amp
48
4
September 2015
PT2334
IMPORTANT NOTICE
Princeton Technology Corporation (PTC) reserves the right to make corrections, modifications, enhancements,
improvements, and other changes to its products and to discontinue any product without notice at any time.
PTC cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a PTC product. No
circuit patent licenses are implied.
Princeton Technology Corp.
2F, 233-1, Baociao Road,
Sindian Dist, New Taipei City 23145, Taiwan
Tel: 886-2-66296288
Fax: 886-2-29174598
http://www.princeton.com.tw
V1.4
17
September 2015