PMP10338 Reference Design

Texas Instruments

100V-400Vdc Input: 15V/25mA Auxillary Supply Reference Design


This reference design generates a non-isolated 15V/25mA output from a 100V-400V DC input. It is intended to be used as an auxillary bias supply in off-line applications.  It can be connected directly to the bulk input cap: after the bridge rectifier in most AC/DC system.  The UCC28910 with integrated 700V MOSFET controls a simple flyback converter power stage. The variable switching frequency control method and valley switching of the UCC28910 reduce losses.  This highly integrated design consumes very little board space and is comprised of only 13 components.

  • Auxillary bias power supply for AC/DC systems Highly integrated design consumes only 0.42 square inches (2.6 square cm) of board space High Efficiency - maintains over 50% efficiency with loads down to 5mA
Product Categories
  • Power management


Part Number Name Companion Part
UCC28910 UCC28910 Buy Datasheet

Bill Of Materials

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Test Data

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Other Documents

Title Updated Type Size (KB)
PMP10338 PCB 09 Sep 2014 PDF 124
PMP10338 Assembly Drawing 09 Sep 2014 PDF 48
PMP10338 BOM 09 Sep 2014 PDF 80
PMP10338 Schematic 09 Sep 2014 PDF 159