Four-output, SEPIC converter-bias power supply reference design for solar panel applications
PMP21883
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Key Document
- Four-Output, SEPIC-Converter-Bias Power Supply Reference Design
(PDF 3163 KB)
08 Oct 2019
Description
This reference design supplies two non-isolated and two isolated output voltages. It references a regulated 3.3-V/0.25-A and an unregulated 12-V/0.05-A output on the primary-side, and it isolates two 12-V/0.025-A unregulated outputs. The design operates over an input voltage range of 7 V to 45 V and offers minimal voltage ringing on the FET for lower stress and reduced EMI.
Features
- SEPIC topology eliminates FET voltage ringing for reduced stress and lower EMI
- Four-output single-ended primary-inductor converter (SEPIC) from single transformer provides excellent cross regulation
- Full load efficiency greater than 80% from 12-V and 24-V input
- Compact size (30 mm x 40 mm) minimizes required PCB area
See the Important Notice and Disclaimer covering reference designs and other TI resources.