PMP40379

500-W, single stage LLC power supply reference design for audio amplifier

PMP40379

Design files

Overview

This single-stage LLC converter reference design illustrates how to convert AC input voltage (100-120 Vac and 200-240 Vac) to isolated ±42-V DC output with the UCC256302 resonant controller. The design has a regulated ±42-V output that can handle up to 6 A of continuous output current and 12 A of peak current for 100 ms.

Features
  • 100–120-Vac or 200–240-Vac input range operation without front-end PFC
  • Provides ±42-V at 6-A continuous/12-A peak output current for audio amplifier
  • More than 95% peak efficiency and less than 500-mW standby power consumption at 230-Vac
Output voltage options PMP40379.1 PMP40379.2 PMP40379.3 PMP40379.4
Vin (Min) (V) 100 100 200 200
Vin (Max) (V) 120 120 240 240
Vout (Nom) (V) 42 -42 42 -42
Iout (Max) (A) 6 6 6 6
Output Power (W) 252 252 252 252
Isolated/Non-Isolated Isolated Isolated Isolated Isolated
Input Type AC AC AC AC
Topology Half Bridge- LLC Half Bridge- LLC Half Bridge- LLC Half Bridge- LLC
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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.

TIDT037.PDF (1107 K)

Test results for the reference design, including efficiency graphs, test prerequisites and more

TIDRXP7.PDF (200 K)

Detailed schematic diagram for design layout and components

TIDRXP8.PDF (105 K)

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

TIDRXP9.PDF (233 K)

Detailed overview of design layout for component placement

TIDRXQ1.ZIP (2168 K)

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

TIDCF11.ZIP (1226 K)

Design file that contains information on physical board layer of design PCB

TIDRXQ0.PDF (1395 K)

PCB layer plot file used for generating PCB design layout

Products

Includes TI products in the design and potential alternatives.

AC/DC & DC/DC controllers (external FET)

UCC256302LLC resonant controller with high voltage start up enabling low standby power

Data sheet: PDF
Shunt voltage references

TL431Adjustable precision shunt regulator

Data sheet: PDF | HTML

Technical documentation

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Type Title Date
* Test report 500-W, Single Stage LLC Power Supply Reference Design for Audio Amplifier Nov. 09, 2018
Application note Designing With the Improved TL431LI (Rev. A) Jun. 28, 2019

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