TAS5622A_15 Datasheet, PDF (1/42 Pages) Texas Instruments – TAS5622A 125-W Stereo and 250-W Stereo PurePath™ HD Digital-Input Class-D Power Stage

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TAS5622A
SLAS845A – MAY 2012 – REVISED MARCH 2015
TAS5622A 125-W Stereo and 250-W Stereo PurePath™ HD Digital-Input Class-D Power
Stage
1 Features
•1 PurePath™ HD Integrated Feedback Provides:
– 0.025% 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 40mΩ
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 PBTL Mono Configuration
• Output Power at 1%THD+N
– 105-W and 4-Ω BTL Stereo Configuration
– 210-W and 2-Ω PBTL Mono 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 TAS5622A device is a thermally enhanced
version of the class-D power amplifier based on the
TAS5612A using 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
TAS5622A leads to industry-leading levels of
efficiency ensuring a super “green” system.
The TAS5622A 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 TAS5622A makes the
amplifier easy to use; and, using TI’s reference
schematics and PCB layouts leads to fast design in
time. The TAS5622A is available in the space-saving,
surface-mount, 44-pin HTSSOP package.
Device Information⁽¹⁾
PART NUMBER PACKAGE
BODY SIZE (NOM)
TAS5622A
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 TAS5622A Application Block Diagram
DIGITAL
AUDIO
INPUT
TAS xxxx
Digital Audio
Processor
PurePath HD^TM
TA_TS_A56_S30_5622A
+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.