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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

deliver high-quality, high-efficiency audio amplification

with proven EMI compliance. This device requires two

•

2×100 W at 10% THD+N Into 4-

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

•

2×80 W at 10% THD+N Into 6-

Ω BTL

32 V for PVDD. The TAS5142 does not require

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

•

2×65 W at 10% THD+N Into 8-

Ω BTL

The efficiency of this digital amplifier is greater than

•

4×40 W at 10% THD+N Into 3-

Ω SE

90% into 6

Ω, which enables the use of smaller

•

4×30 W at 10% THD+N Into 4-

Ω SE

power supplies and heatsinks.

•

1×160 W at 10% THD+N Into 3-

Ω PBTL

The TAS5142 has an innovative protection system

•

1×200 W at 10% THD+N Into 2-

integrated on-chip, safeguarding the device against a

wide range of fault conditions that could damage the

•

>100 dB SNR (A-Weighted)

system. These safeguards are short-circuit protection,

•

<0.1% THD+N at 1 W

overcurrent protection, undervoltage protection, and

•

Two Thermally Enhanced Package Options:

overtemperature protection. The TAS5142 has a new

– DKD (36-pin PSOP3)

proprietary current-limiting circuit that reduces the

possibility of device shutdown during high-level music

– DDV (44-pin HTSSOP)

transients. A new programmable overcurrent detector

•

High-Efficiency Power Stage (>90%) With

allows the use of lower-cost inductors in the demodu-

140-m

Ω Output MOSFETs

lation output filter.

•

Power-On Reset for Protection on Power Up

BTL OUTPUT POWER vs SUPPLY VOLTAGE

Without Any Power-Supply Sequencing

•

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

(1) It is not recommended to drive 200 W (total

capable of driving a 4-

Ω bridge-tied load (BTL) at up

power) into the DDV package continuously.

to 100 W per channel with low integrated noise at the

For multichannel systems that require two

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

channels to be driven at full power with the

DDV package option, it is recommended to

dissipation.

design the system so that the two channels

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

are in two separate devices.

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

PurePath Digital™

TAS5508) and the TAS5142. This system only re-

quires a simple passive LC demodulation filter to

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.