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PT2337-LQL

Stereo 2W Class-D Amplifier With Built-In Audio Processor

Princeton Technology 

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 I2C bus.

APPLICATIONS

• Portable player duck speaker system

• Portable media player

• Digital photo frame

• Flat panel display and TV

• Other audio applications

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 I2C interface

• Pin-compatible with PT2334 (Partly functions

compatible)

• LQFP 48 pins package

BLOCK DIAGRAM

R1

R2

R3

R4

VDD

BYPASS

GND

AVDD

AGND

SD

RT

RB2 RB1

R-VOL

T REBLE

BA SS

Vref

Vref

RCH 2W

CLA S S-D

OE

SDA

Cont rol

Int e rfac e

SCL

LCH 2W

CLA S S-D

Vref

L4

L3

T REBLE

BA SS

L2

L-VOL

L1

LT

LB2 LB1

ROUT

RINP

RINN

RVDD ROP

RGND RON

LGND LON

LVDD LOP

LINN

LINP

LOUT

Tel: 886-66296288‧Fax: 886-29174598‧ http://www.princeton.com.tw‧2F, 233-1, Baociao Road, Sindian, Taipei 23145, Taiwan

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