PT2335 Datasheet, PDF (1/5 Pages) Princeton Technology Corp – 2W X 2 Stereo Integrated Audio Amplifier

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 I²C bus.
APPLICATIONS
• Portable player duck speaker system
• Portable media player
• Digital photo frame
• Flat panel display and TV
• Other audio applications
BLOCK DIAGRAM
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 I²C interface
• High power CMOS processing
• LQFP 48 pins package
R1
R2
R3
R4
VDD
BYPASS
GND
AVDD
AGND
SD
OE
SDA
SCL
L4
L3
L2
L1
RGOUT
RIN LOUDR
RT
RB2
RB1
INPUT
GA I N
V O LUME TREBLE
BA SS
ROUT
C ontrol
I nterfac e
INT OSC
CLOCK SEL
RC H 2W
CLA SS-D
RINP
RINN
RVDD _{RO P}
RGND ^{RO N}
EXT O SC
OSC3
OSC2
OSC1
LCH 2W
CLA SS-D
LGND _{LO N}
LVDD ^{LO P}
LINN
LINP
INPUT
GA I N
V O LUME TREBLE
BA SS
LOUT
LGOUT
LIN LOUDL
LT
LB2
LB1
Tel: [phone]‧Fax: [phone]‧ http://www.princeton.com.tw‧2F, 233-1, Baociao Road, Sindian, Taipei 23145, Taiwan