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LM5025A

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SNVS293F – DECEMBER 2004 – REVISED AUGUST 2016

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7 Detailed Description

7.1 Overview

The LM5025A PWM controller contains all of the features necessary to implement active clamp / reset technique

voltage-mode controlled power converters. Synchronous rectification allows higher conversion efficiency and

greater power density than conventional PN or Schottky rectifier techniques. The high voltage start-up regulator

of the LM5025A can be configured to operate with input voltages ranging from 13 V to 90 V. Additional features

include line undervoltage lockout, cycle-by-cycle current limit, voltage feed-forward compensation, hiccup mode

fault protection with adjustable delays, soft-start, a 1-MHz capable oscillator with synchronization capability,

precision reference, and thermal shutdown. These features simplify the design of active voltage-mode active

clamp / reset DC-DC power converters.