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PT2334-LQ

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

Princeton Technology 

PT2334

Stereo 2W Class-D Amplifier with Built-In

Audio Processor

DESCRIPTION

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

whole chip functions are controlled via I2C bus.

APPLICATIONS

• Flat panel display and TV

• Portable media player

• Portable player ducking system

• Digital photo frame

• Other audio applications

BLOCK DIAGRAM

DACRO R1

R2

R3

R4

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

• Controlled by I2C interface

• High Power CMOS processing

• Available in 48 Pins, LQFP

RT

RB2

RB1 ROUT HVDD RHPO RINP RINN

SDI

LRCI

BCKI

BYPASS

AVDD

AGND

SD

OE

SDA

SCL

HPEN

SDI

LRCI

16-Bit

DA C

BCKI

Bypass

VDDA

GNDA

SD

Power

Man ag e me n t

OE

SDA

SCL

HPEN

Co nt ro l

In t e rfac e

R-VOL

Vref

Vref

Vref

L-VOL

T REBLE

RCH

BA SS

RCH

T REBLE

LCH

BA SS

LCH

HPR

RCH 2W

CLA S S-D

RVDD ROP

SPR

RGND RON

LCH 2W

CLA S S-D

LGND LON

SPL

LVDD LOP

HPL

DACLO L1

L2

L3

L4

LT

LB2

LB1 LOUT HGND LHPO LINP LINN

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

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