Primary-Side Regulated Flyback with 85 to 265VAC Input (12V @ 1A) Reference Design
PMP8780
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Key Document

Description

The PMP8780 reference design uses the UCC28700 primary-side regulated flyback controller to generate a 12V/1A output from a univeral AC input. The valley switching of the UCC28700 allows this low-cost design to achieve an average efficiency over 83%; no load losses are less than 40mW.

Features
  • Over 83% average efficiency
  • Primary side regulation eliminates optocoupler and error amplifier for a low cost solution
  • Meets Class B conducted EMI emissions

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Schematic/Block Diagram

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Design Guide

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Design Files

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Parametrics
 PMP8780.1
(Output Voltage 1)
Vin (Min) (V)85
Vin (Max) (V)265
Vout (Nom) (V)12
Iout (Max) (A)1
Output Power (W)12
Isolated/Non-IsolatedIsolated
Input TypeAC
TopologyFlyback- DCM
Flyback- Quasi Resonant

Technical Documents

See the Important Notice and Disclaimer covering reference designs and other TI resources.

User guides (1)
Title Type Size (KB) Date
PDF 2590 07 Oct 2015
Design files (3)
Title Type Size (KB) Date
PDF 54 07 Oct 2015
PDF 79 07 Oct 2015
PDF 122 07 Oct 2015

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