TAS5612LA_15 Datasheet, PDF (1/41 Pages) Texas Instruments – TAS5612LA 125-W Stereo and 250-W Mono PurePath™ HD Digital-Input Class-D Power Stage

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TAS5612LA
SLAS847A – MAY 2012 – REVISED MARCH 2015
TAS5612LA 125-W Stereo and 250-W Mono PurePath™ HD Digital-Input Class-D Power
Stage
1 Features
•1 PurePath™ HD Integrated Feedback Provides:
– 0.05% THD at 1 W Into 4 Ω
– > 65-dB PSRR (No Input Signal)
– > 105-dB (A Weighted) SNR
• Preclipping Output for Control of a Class-G Power
Supply
• Reduced Heat Sink Size Due to Use of 60-mΩ
Output MOSFET With > 90% Efficiency at Full
Output Power
• Output Power at 10% THD+N
– 125-W and 4-Ω BTL Stereo Configuration
– 250-W and 2-Ω in PBTL Mono Configuration
• Output Power at 1% THD+N
– 105-W and 4-Ω BTL Stereo Configuration
– 55-W and 8-Ω BTL Stereo Configuration
• Click- and Pop-Free Start-up
• Error Reporting Self-Protected Design With UVP,
Overtemperature, and Short-Circuit Protection
• EMI Compliant When Used With Recommended
System Design
• 44-Pin HTSSOP (DDV) Package for Reduced
Board Size
2 Applications
• Blu-ray™ and DVD Receivers
• High-Power Sound Bars
• Powered Subwoofer and Active Speakers
• Mini Combo Systems
3 Description
The TAS5612LA is a feature optimized class-D power
amplifier based on the TAS5612A.
The TAS5612LA uses large MOSFETs for improved
power efficiency and a novel gate drive scheme for
reduced losses in idle and at low output signals
leading to reduced heat sink size.
The unique preclipping output signal can be used to
control a class-G power supply. This combined with
the low idle loss and high power efficiency of the
TAS5612LA leads to industry-leading levels of
efficiency ensuring a super “green” system.
The TAS5612LA uses constant voltage gain. The
internally matched gain resistors ensure a high Power
Supply Rejection Ratio giving an output voltage only
dependent on the audio input voltage and free from
any power supply artifacts.
The high integration of the TAS5612LA makes the
amplifier easy to use; and, using TI’s reference
schematics and PCB layouts leads to fast design in
time. The TAS5612LA is available in the space-
saving, surface-mount, 44-pin HTSSOP package.
Device Information⁽¹⁾
PART NUMBER
PACKAGE
BODY SIZE (NOM)
TAS5612LA
HTSSOP (44) 14.00 mm × 6.10 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
Typical TAS5612LA Application Block Diagram
DIGITAL
AUDIO
INPUT
TAS xxxx
Digital Audio
Processor
PurePath HD^TM
T_TA_A5S6_S30_5612LA
+3.3V
REG.
+12V
18V-32.5V
PurePath HD^TM
Class G Power Supply
Ref design
→ ^{105VAC 240VAC}
1
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.