This 20-W multiple output, auxiliary power reference design supports AC/DC industrial power supplies with a wide input voltage range (100-425 VDC). The design achieves a peak efficiency of 85% by using discontinuous conduction mode (DCM) valley-switching of TI’s UCC28704 flyback controller with primary side regulation. The compact design uses a minimum number of components to help protect the system, including output overcurrent and output short circuit. The hardware is tested to meet Conducted Emission norm EN55022 Class A using an external EMI filter.
A fully assembled board has been developed for testing and performance validation only, and is not available for sale.
Download ready-to-use system files to speed your design process.
Reference design overview and verified performance test data
Detailed schematic diagram for design layout and components
Complete listing of design components, reference designators, and manufacturers/part numbers
Detailed overview of design layout for component placement
Files used for 3D models or 2D drawings of IC components
Design file that contains information on physical board layer of design PCB
PCB layer plot file used for generating PCB design layout
| Type | Title | Date | ||
|---|---|---|---|---|
| * | Design guide | 20W, 100 to 425VDC, 85% Efficient, Multi-Output, Aux Power Supply Ref Design (Rev. A) | Jan. 29, 2018 |
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