Preliminary
PT2337
Stereo 2W Class-D Amplifier With Built-In
Audio Processor
DESCRIPTION
The PT2337 is an integrated audio amplifier design for
the low voltage (5V) application purpose, built-in
stereo 2W Class-D power amplifier with audio
processor, it provides 4 stereo sources selector, and
all signal process is based on pure analog processing
to maintain high performances and low power
consumption. The audio processor includes all the
advanced control functions such like digital controlled
volume, treble and bass control. The whole chip
functions are controlled via I
2
C bus.
FEATURES
•
Supply voltage: 3 ~ 6V
•
2W X 2 Class-D power amplifier (VDD=5V,
RL=4Ω)
•
4 Stereo inputs
•
32 steps, independent channel volume controller
•
Bass and treble control.
•
2 voltage gain setting for power amp, (20dB, 26dB)
•
Pop-Free circuitry eliminates unpleasant noises
during power ON/OFF.
•
Low power shutdown
•
High PSRR
•
High RF radiation immunity.
•
Over heat/over current protection
•
Controlled by I
2
C interface
•
Pin-compatible with PT2334 (Partly functions
compatible)
•
LQFP 48 pins package
APPLICATIONS
•
•
•
•
•
Portable player duck speaker system
Portable media player
Digital photo frame
Flat panel display and TV
Other audio applications
BLOCK DIAGRAM
RT
R1
R2
R3
R4
Vref
VDD
BYPASS
GND
AVDD
AGND
SD
LGND
OE
SDA
SCL
L4
L3
L2
L1
LT
LB2 LB1
L-VOL
LON
RB2 RB1
R-VOL
T REBLE
BASS
ROUT
RINP
RINN
RCH 2W
CLASS-D
Vref
Cont rol
Interface
Vref
Tel: 886-66296288
‧
Fax: 886-29174598
‧
http://www.princeton.com.tw
‧
2F, 233-1, Baociao Road, Sindian, Taipei 23145, Taiwan
Power
Management
RVDD
ROP
RGND
RON
LCH 2W
CLASS-D
LVDD
LOP
LINN
LINP
T REBLE
BASS
LOUT
PTC [ PRINCETON TECHNOLOGY CORP ]
