Preliminary
PT2335
2W X 2 Stereo Integrated Audio Amplifier
DESCRIPTION
The PT2335 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, adaptive loudness, treble and bass control. It
also provides line output for versatile application. The
whole chip functions are controlled via I
2
C bus.
FEATURES
•
Supply voltage: 3 ~ 6V
•
4 Stereo inputs
•
Input gain selectable (0dB, 3.75dB, 7.5dB,
11.25dB)
•
Independent channel volume controller
•
Loudness function
•
Bass and treble control.
•
2W X 2 Class-D power amplifier (VDD=5V,
RL=4Ω)
•
2 voltage gain setting for power amp (20dB, 26dB)
•
Internal and external oscillator selectable
•
Dual switching frequency for avoid AM radio
interference
•
Pop-Free circuitry eliminates unpleasant noises
during power ON/OFF.
•
Low power shutdown
•
High PSRR
•
Over heat/over current protection circuitry
•
Controlled by I
2
C interface
•
High power CMOS processing
•
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
RGOUT
R1
R2
R3
R4
VDD
BYPASS
GND
AVDD
AGND
SD
OE
SDA
SCL
L4
L3
L2
L1
LGOUT
LIN
LOUDL
LT
LB2
LB1
RINP
RIN
LOUDR
RT
RB2
RB1
INP UT
GA IN
V O LUME
TREBLE
BA SS
ROUT
RC H 2W
INT O SC
Power
INP UT
GA IN
C LA SS-D
Management
RINN
RVDD
RO P
RGND
RO N
CLOCK SEL
OSC3
EXT O SC
OSC2
OSC1
LGND
C ontrol
Interface
LC H 2W
C LA SS-D
LO N
LVDD
LO P
LINN
LINP
V O LUME
TREBLE
BA SS
LOUT
Tel: 886-66296288
‧
Fax: 886-29174598
‧
http://www.princeton.com.tw
‧
2F, 233-1, Baociao Road, Sindian, Taipei 23145, Taiwan
PTC [ PRINCETON TECHNOLOGY CORP ]
