TIDA-050024

Envelope-tracking power supply reference design for mid-power audio power amplifier application

TIDA-050024

Design files

Overview

This reference design delivers an envelope-tracking power supply circuit for mid-power audio power amplifier (PA) application with TPS43061 boost controller. By adding an audio envelope signal to the FB pin, the boost converter’s output voltage can change in accordance with the envelope of the audio signal. So the boost converter provides a dynamically changing supply voltage to the PA. Thus the PA can always works at a high efficiency in the whole output power range.

Features
  • Wide input voltage range: 2.5 – 8.4 V
  • 36 W into a 2-Ω load for one cell Lithium battery
  • 64 W into a 2-Ω load for two cell Lithium battery
  • High efficiency
  • Long battery lifetime
  • Fast response
Output voltage options TIDA-050024.1
Vin (Min) (V) 2.7
Vin (Max) (V) 8.4
Vout (Nom) (V) 12
Iout (Max) (A) 6
Output Power (W) 72
Isolated/Non-Isolated Non-Isolated
Input Type DC
Topology Boost- Synchronous

A fully assembled board has been developed for testing and performance validation only, and is not available for sale.

Design files & products

Design files

Download ready-to-use system files to speed your design process.

TIDUEO5.PDF (2702 K)

Reference design overview and verified performance test data

TIDRYV3.ZIP (426 K)

Detailed schematic diagram for design layout and components

TIDRYV4.ZIP (210 K)

Complete listing of design components, reference designators, and manufacturers/part numbers

TIDRYV5.ZIP (133 K)

Detailed overview of design layout for component placement

TIDRYV7.ZIP (1407 K)

Files used for 3D models or 2D drawings of IC components

Products

Includes TI products in the design and potential alternatives.

Boost controllers (external switch)

TPS43061Low Iq, Synchronous Boost Controller with Wide Input Voltage and 5.5V Gate Drive for Low Qg NexFETs

Data sheet document-pdfAcrobat PDF open-in-new HTML
Boost converters (integrated switch)

TPS613226-uA Quiescent Current, 1.8-A Switch Current Boost Converter

Data sheet document-pdfAcrobat PDF open-in-new HTML
General-purpose op amps

TLV9064Quad, 5.5-V, 10-MHz, RRIO operational amplifier for cost-optimized applications

Data sheet document-pdfAcrobat PDF open-in-new HTML
Power blocks

CSD87355Q5D30-V, N channel synchronous buck NexFET™ power MOSFET, SON 5 mm x 6 mm power block, 45 A

Data sheet document-pdfAcrobat PDF open-in-new HTML
Speaker amps

TPA3126D250-W stereo, 100-W mono, 4.5- to 26-V, analog input Class-D audio amplifier w/ low idle current

Data sheet document-pdfAcrobat PDF open-in-new HTML
Speaker amps

TPA3128D230-W stereo, 60-W mono, 4.5- to 26-V, analog input Class-D audio amplifier w/ low idle current

Data sheet document-pdfAcrobat PDF open-in-new HTML

Technical documentation

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* Design guide Envelope-tracking power supply reference design for mid-power audio pwr amp apps Jan. 29, 2019

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