Universal AC Input 32V/100W Audio Supply


Design files


This reference design provides 32V at 100W from a universal AC input. An auxiliary 14V is also provided and can support loads up to 250mA. The UCC28600 quasi-resonant flyback controller allows this design to achieve efficiencies over 86% with a 120VAC input and over 88% with a 230VAC input, yet minimizes light-load losses.

Output voltage options PMP6517.1
Vin (Min) (V) 85
Vin (Max) (V) 265
Vout (Nom) (V) 32
Iout (Max) (A) 3
Output Power (W) 96
Isolated/Non-Isolated Isolated
Input Type AC
Topology Flyback- Quasi Resonant^Flyback- DCM

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.

SLUU619.PDF (2189 K)

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

SLUR482.PDF (112 K)

Detailed schematic diagram for design layout and components

SLUR483.PDF (64 K)

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


Includes TI products in the design and potential alternatives.

Flyback controllers

UCC286008-pin quasi resonant Flyback green mode controller

Data sheet document-pdfAcrobat PDF open-in-new HTML
Shunt voltage references

TL431Adjustable precision shunt regulator

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

Technical documentation

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Type Title Date
Test report PMP6517 Test Results Aug. 16, 2011

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