UCC2891DG4 Datasheet PDF - TI

DESCRIPTION

●The UCC2891/2/3/4 family of PWM controllers is designed to simplify implementation of the various active clamp/reset switching power topologies. The UCC289x is a peak current-mode, fixed

●frequency, high-performance pulse width modulator. It includes the logic and the drive capability for the auxiliary switch with a simple method of programming the critical delays for proper active clamp operation.

●FEATURES

●Ideal for Active Clamp/Reset Forward, Flyback Converters

●Provides Complementary Auxiliary Driver with Programmable Deadtime (Turn-On Delay) between AUX and MAIN Switches

●Peak Current-Mode Control with Cycle-by-Cycle Current Limiting

●110-V Input Startup Regulator on UCC2891/3

●TrueDrive™ 2-A Sink, 2-A Source Outputs

●Accurate Line UV and Line OV Threshold

●Programmable Slope Compensation

●1.0-MHz Synchronizable Oscillator

●Precise Programmable Maximum Duty Cycle

●Programmable Soft Start

●APPLICATIONS

●150-W to 700-W SMPS

●High-Efficiency, Low EMI/RFI Off-Line or DC/DC Converters

●Server, 48-V Telecom, Datacom

●High Power Adapter, LCD-TV and PDP-TV