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PVDD − Supply Voltage − V

0

10

20

30

40

50

60

70

80

90

100

110

120

0

4

8

12

16

20

24

28

32

8

Ω

4

Ω

THD+N @ 10%

6

Ω

G002

TAS5142

SLES126B – DECEMBER 2004 – REVISED MAY 2005

STEREO DIGITAL AMPLIFIER POWER STAGE

requires a simple passive LC demodulation filter to

deliver high-quality, high-efficiency audio amplification

•

2×100 W at 10% THD+N Into 4-

with proven EMI compliance. This device requires two

•

2×80 W at 10% THD+N Into 6-

Ω BTL

power supplies, at 12 V for GVDD and VDD, and at

32 V for PVDD. The TAS5142 does not require

•

2×65 W at 10% THD+N Into 8-

Ω BTL

power-up sequencing due to internal power-on reset.

•

4×40 W at 10% THD+N Into 3-

Ω SE

The efficiency of this digital amplifier is greater than

•

4×30 W at 10% THD+N Into 4-

Ω SE

90% into 6

Ω, which enables the use of smaller

•

1×160 W at 10% THD+N Into 3-

Ω PBTL

power supplies and heatsinks.

•

1×200 W at 10% THD+N Into 2-

The TAS5142 has an innovative protection system

integrated on-chip, safeguarding the device against a

•

>100 dB SNR (A-Weighted)

wide range of fault conditions that could damage the

•

<0.1% THD+N at 1 W

system. These safeguards are short-circuit protection,

•

Two Thermally Enhanced Package Options:

overcurrent protection, undervoltage protection, and

– DKD (36-pin PSOP3)

overtemperature protection. The TAS5142 has a new

proprietary current-limiting circuit that reduces the

– DDV (44-pin HTSSOP)

possibility of device shutdown during high-level music

•

High-Efficiency Power Stage (>90%) With

transients. A new programmable overcurrent detector

140-m

Ω Output MOSFETs

allows

the

use

of

lower-cost

inductors

in

the

•

Power-On Reset for Protection on Power Up

demodulation output filter.

Without Any Power-Supply Sequencing

BTL OUTPUT POWER vs SUPPLY VOLTAGE

•

Integrated Self-Protection Circuits Including

Undervoltage, Overtemperature, Overload,

Short Circuit

•

Error Reporting

•

EMI Compliant When Used With

Recommended System Design

•

Intelligent Gate Drive

•

Mini/Micro Audio System

•

DVD Receiver

•

Home Theater

The TAS5142 is a third-generation, high-perform-

ance, integrated stereo digital amplifier power stage

with an improved protection system. The TAS5142 is

capable of driving a 4-

Ω bridge-tied load (BTL) at up

(1)

It is not recommended to drive 200 W (total power) into the

to 100 W per channel with low integrated noise at the

DDV package continuously. For multichannel systems that

output, low THD+N performance, and low idle power

require two channels to be driven at full power with the

dissipation.

DDV package option, it is recommended to design the

system so that the two channels are in two separate

A low-cost, high-fidelity audio system can be built

devices.

using a TI chipset, comprising a modulator (e.g.,

PurePath Digital™

TAS5508) and the TAS5142. This system only

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.

PurePath Digital, PowerPad are trademarks of Texas Instruments.

All trademarks are the property of their respective owners.

PRODUCTION DATA information is current as of publication date.

Copyright © 2004–2005, 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.