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reference designUCC28781-Q1 | Demoboard PMP23195

Texas Instruments UCC28781-Q1 | Demoboard PMP23195

19-W, AC/DC multioutput 5-V and 12-V ZVS flyback reference design for server applications

Overview

TopologyFlyback Converter
Input voltage90-265 V
Switching frequency500 kHz
Output 112 V / 1.5 A
Output 25 V / 0.2 A
IC revisionA

Description

This reference design converts a universal AC input to an isolated 12-V, 1.5-A output and an isolated 5-V, 0.2-A output. The design achieves a peak efficiency of 92.7%. This reference design features UCC28781-Q1 which is a zero-voltage switching (ZVS) flyback controller to minimize switching losses, UCC5350, a reinforced isolated gate driver to drive the synchronous rectifier MOSFET and TPS629203, a synchronous buck converter with low quiescent current.

Features

  • Peak efficiency of 92.7%
  • ZVS on primary side
  • Synchronous rectification to minimize conduction loss on 12-V output

Typical applications

  • Medical PSU
  • Industrial AC/DC

More information

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7447052
SPECWE-FI Leaded Toroidal Line Choke, 32 µH, 2.6 A
Availability
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Status Activei| Production is active. Expected lifetime: >10 years.
Product seriesWE-FI Leaded Toroidal Line Choke
Inductance32 µH
Rated Current2.6 A
DC Resistance0.045 Ω
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