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

(ACTIVE) PMP10338

Description & Features

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Description

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.

Features
  • 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

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Schematic/Block Diagram

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Test Data

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Design Files

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Bill of Materials (BOM)

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Parametrics
 PMP10338.1
(Output Voltage 1)
Vin (Min) (V)100
Vin (Max) (V)400
Vout (Nom) (V)15
Iout (Max) (A).025
Output Power (W).375
Isolated/Non-IsolatedNon-Isolated
Input TypeDC
TopologyFlyback- DCM
Flyback- Integrated Switch

TI Devices (1)

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Part Number Name Product Family Sample & Buy Design Kits & Evaluation Modules
UCC28910  700V Flyback Switcher with Constant-Voltage Constant-Current and Primary-side Control  Offline & isolated DC/DC controllers & converters  Sample & Buy View Design Kits & Evaluation Modules

CAD/CAE symbols

Part # Package | Pins CAD File (.bxl) STEP Model (.stp)
UCC28910 Download Download

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Technical Documents

View the Important Notice for TI Designs covering authorized use, intellectual property matters and disclaimers.

User guides (1)
Title Abstract Type Size (KB) Date Views
PDF 1690 09 Sep 2014 13
Design files (4)
Title Abstract Type Size (KB) Date Views
PDF 124 09 Sep 2014 2
PDF 48 09 Sep 2014 2
PDF 80 09 Sep 2014 4
PDF 159 09 Sep 2014 7

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