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UCC2897 Datasheet Active Clamp PWM Controller

Manufacturer: Texas Instruments

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General Description

The UCC2897 PWM controller simplifies implementation of the various active clamp/reset and synchronous rectifier switching power topologies.

Based on the UCC2891 active-clamp controller the UCC2897 is a peak current-mode, fixedfrequency, high-performance pulse width modulator.

It includes the logic and the drive capability for the P-channel auxiliary switch along with a simple method of programming the critical delays for proper active clamp operation.

Overview

UCC2897 ą SLUS591G − NOVEMBER 2003 − REVISED DECEMBER 2008 ADVANCED CURRENTĆMODE ACTIVE CLAMP PWM.

Key Features

  • D Ideal for Active Clamp/Reset Forward, Flyback and Synchronous Rectifier Apps D Provides Complementary Auxiliary Driver with Programmable Deadtime (Turn-On Delay) between AUX and MAIN Switches D Peak Current-Mode Control with 0.5-V Cycle-by-Cycle Current Limiting D Hiccup Mode 0.75-V Current Limit D TrueDrivet 2-A Sink, 2-A Source Outputs D 110-V Input Startup Device D Trimmed Internal Bandgap Reference for Accurate Line UV and Line OV Threshold D Programmable Slope Compensation D High-Performa.

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