TAS5342A Datasheet, PDF (1/27 Pages) Texas Instruments – 100 W STEREO DIGITAL AMPLIFIER POWER STAGE

TM
TAS5342A
www.ti.com ........................................................................................................................................................................................... SLAS623 – NOVEMBER 2008
100 W STEREO DIGITAL AMPLIFIER POWER STAGE
FEATURES
1
•23 Total Power Output (Bridge Tied Load)
– 2 × 100 W at 10% THD+N Into 4 Ω
– 2 × 80 W at 10% THD+N Into 6 Ω
– 2 × 65 W at 10% THD+N Into 8 Ω
• Total Power Output (Single Ended)
– 4 × 40 W at 10% THD+N Into 3 Ω
– 4 × 30 W at 10% THD+N Into 4 Ω
• Total Power Output (Parallel Mode)
– 1 × 200 W at 10% THD+N Into 2 Ω
– 1 × 160 W at 10% THD+N Into 3 Ω
• >110 dB SNR (A-Weighted With TAS5518
Modulator)
• <0.1% THD+N (1 W, 1 kHz)
• Supports PWM Frame Rates of 192 kHz to
432 kHz
• Resistor-Programmable Current Limit
• Integrated Self-Protection Circuitry, Including:
– Under Voltage Protection
– Overtemperature Warning and Error
– Overload Protection
– Short-Circuit Protection
– PWM Activity Detector
• Standalone Protection Recovery
• Power-On Reset (POR) to Eliminate System
Power-Supply Sequencing
• High-Efficiency Power Stage (>90%) With
80-mΩ Output MOSFETs
• Thermally Enhanced Package 44-Pin HTSSOP
(DDV)
• Error Reporting, 3.3-V and 5.0-V Compliant
• EMI Compliant When Used With
Recommended System Design
APPLICATIONS
• Mini/Micro Audio System
• DVD Receiver
• Home Theater
DESCRIPTION
The TAS5342A is a high-performance, integrated
stereo digital amplifier power stage designed to drive
a 4-Ω bridge-tied load (BTL) at up to 100 W per
channel with low harmonic distortion, low integrated
noise, and low idle current.
The TAS5342A has a complete protection system
integrated on-chip, safeguarding the device against a
wide range of fault conditions that could damage the
system. These protection features are short-circuit
protection, over-current protection, under voltage
protection, over temperature protection, and a loss of
PWM signal (PWM activity detector).
A power-on-reset (POR) circuit is used to eliminate
power-supply sequencing that is required for most
power-stage designs.
BTL OUTPUT POWER
vs
SUPPLY VOLTAGE
130
125
120 ^T_C ^{= 75°C}
115 _{THD+N at 10%}
110
105
100
95
90
85
80
75
70
4Ω
65
60
55
50
45
40
35
6Ω
30
25
20
15
8Ω
10
5
0
0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30
PVDD – Supply Voltage – V
PurePath Digital™
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.
PurePath Digital, PowerPad are trademarks of Texas Instruments.
2
All other trademarks are the property of their respective owners.
3
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 © 2008, Texas Instruments Incorporated