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Designing UCC28250 as secondary side control for output turn-on with pre-bias condition

Posted: 16 Feb 2011     Print Version  Bookmark and Share

Keywords:UCC28250  secondary side controller  pre-bias condition 

This application note addresses the considerations for using the UCC28250 as a secondary side controller. With voltage mode control, the UCC28250 can be used in a design that produces smooth turn-on performance with an output pre-bias condition. The design guidelines are summarized from various performance tests and examined particularly on a 100-W, dc-dc half bridge converter. This converter is designed for telecom input of 36 V to 75 V and an output voltage of 3.3 V. This document provides test results based on these guidelines, and also offers some test results that demonstrate the outcomes when the guidelines are not followed.

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