TAS5142_15 Datasheet, PDF (1/32 Pages) Texas Instruments – STEREO DIGITAL AMPLIFIER POWER STAGE

TM
TAS5142
www.ti.com
SLES126B – DECEMBER 2004 – REVISED MAY 2005
STEREO DIGITAL AMPLIFIER POWER STAGE
FEATURES
• 2×100 W at 10% THD+N Into 4-Ω BTL ⁽¹⁾
• 2×80 W at 10% THD+N Into 6-Ω BTL
• 2×65 W at 10% THD+N Into 8-Ω BTL
• 4×40 W at 10% THD+N Into 3-Ω SE
• 4×30 W at 10% THD+N Into 4-Ω SE
• 1×160 W at 10% THD+N Into 3-Ω PBTL
• 1×200 W at 10% THD+N Into 2-Ω PBTL ⁽¹⁾
• >100 dB SNR (A-Weighted)
• <0.1% THD+N at 1 W
• Two Thermally Enhanced Package Options:
– DKD (36-pin PSOP3)
– DDV (44-pin HTSSOP)
• High-Efficiency Power Stage (>90%) With
140-mΩ Output MOSFETs
• Power-On Reset for Protection on Power Up
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
APPLICATIONS
• Mini/Micro Audio System
• DVD Receiver
• Home Theater
DESCRIPTION
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
to 100 W per channel with low integrated noise at the
output, low THD+N performance, and low idle power
dissipation.
A low-cost, high-fidelity audio system can be built
using a TI chipset, comprising a modulator (e.g.,
TAS5508) and the TAS5142. This system only
requires a simple passive LC demodulation filter to
deliver high-quality, high-efficiency audio amplification
with proven EMI compliance. This device requires two
power supplies, at 12 V for GVDD and VDD, and at
32 V for PVDD. The TAS5142 does not require
power-up sequencing due to internal power-on reset.
The efficiency of this digital amplifier is greater than
90% into 6 Ω, which enables the use of smaller
power supplies and heatsinks.
The TAS5142 has an innovative protection system
integrated on-chip, safeguarding the device against a
wide range of fault conditions that could damage the
system. These safeguards are short-circuit protection,
overcurrent protection, undervoltage protection, and
overtemperature protection. The TAS5142 has a new
proprietary current-limiting circuit that reduces the
possibility of device shutdown during high-level music
transients. A new programmable overcurrent detector
allows the use of lower-cost inductors in the
demodulation output filter.
BTL OUTPUT POWER vs SUPPLY VOLTAGE
120
110
T_C = 75°C
THD+N @ 10%
100
90
4Ω
80
70
60
6Ω
50
40
30
20
8Ω
10
0
0 4 8 12 16 20 24 28 32
PVDD − Supply Voltage − V
G002
(1) It is not recommended to drive 200 W (total power) into the
DDV package continuously. For multichannel systems that
require two channels to be driven at full power with the
DDV package option, it is recommended to design the
system so that the two channels are in two separate
devices.
PurePath Digital™
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.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 2004–2005, Texas Instruments Incorporated