PurePath HD

TM

Class G Power Supply

Ref design

TAS5630

18V-32.5V

+12V

PurePath HD

TM

TAS5622A

TASxxxx

Digital Audio

Processor

DIGITAL

AUDIO

INPUT

+3.3V

REG.

105 VAC

240VAC

→

TAS5622A

www.ti.com

SLAS845 – MAY 2012

125-W Stereo / 250-W Stereo PurePath™ HD Digital-Input Class-D Power Stage

Check for Samples: TAS5622A

1

FEATURES

DESCRIPTION

The TAS5622A is a thermally-enhanced version of

234

•

PurePath™ HD Integrated Feedback Provides:

the class-D power amplifier based on the TAS5612A

–

0.025% THD at 1 W into 4

Ω

using large MOSFETs for improved power efficiency

–

>65 dB PSRR (No Input Signal)

and a novel gate drive scheme for reduced losses in

idle and at low output signals leading to reduced heat

–

>105 dB (A weighted) SNR

sink size.

•

Pre-Clipping Output for Control of a Class-G

The unique pre clipping output signal can be used to

Power Supply

control a Class-G power supply. This combined with

•

Reduced Heat Sink Size due to use of 40m

Ω

the low idle loss and high power efficiency of the

Output MOSFET with >90% Efficiency at Full

TAS5622A

leads

to

industry

leading

levels

of

Output Power

efficiency ensuring a super “green” system.

•

Output Power at 10%THD+N

The TAS5622A uses constant voltage gain. The

–

125 W / 4

Ω BTL Stereo Configuration

internally matched gain resistors ensure a high Power

–

250 W / 2

Ω PBTL Mono Configuration

Supply Rejection Ratio giving an output voltage only

dependent on the audio input voltage and free from

•

Output Power at 1%THD+N

any power supply artifacts.

–

105 W / 4

Ω BTL Stereo Configuration

The high integration of the TAS5622A makes the

–

210 W / 2

Ω PBTL Mono Configuration

amplifier easy to use; and, using TI’s reference

•

Click and Pop Free Startup

schematics and PCB layouts leads to fast design in

•

Error Reporting Self-protected Design with

time. The TAS5622A is available in the space saving

UVP, Over Temperature, and Short Circuit

surface

mount

44-pin

HTSSOP

package.

PowerPAD™ PurePath™ HD

Protection

•

EMI Compliant when used with Recommended

System Design

•

44-Pin HTSSOP (DDV) Package for Reduced

Board Size

APPLICATIONS

•

Blu-ray™/DVD Receivers

•

High Power Sound Bars

•

Powered Subwoofer and Active Speakers

•

Mini Combo Systems

1

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of

Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

2

PowerPAD, PurePath are trademarks of Texas Instruments.

3

Blu-ray is a trademark of Blu-ray Disk Association (BDA).

4

All other trademarks are the property of their respective owners.

PRODUCTION DATA information is current as of publication date.

Copyright © 2012, Texas Instruments Incorporated

Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.