UCC2894D .

产品概述

The UCC2894D is a current-mode active clamp Pulse Width Modulation (PWM) Controller designed to simplify implementation of the various active clamp/reset switching power topologies. It 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. Additional features include an internal programmable slope compensation circuit, precise DMAX limit and a single resistor programmable synchronizable oscillator. An accurate line monitoring function also programs the converter’s ON and OFF transitions with regard to the bulk input voltage.

• Low output jitter
• Soft-stop shutdown of MAIN and AUX
• Ideal for active clamp/reset forward, flyback converters
• Peak current-mode control with cycle-by-cycle current limiting
• Accurate line UV and line OV threshold
• Programmable slope compensation
• Precise programmable maximum duty cycle
• Programmable soft-start
• Green product and no Sb/Br

应用

电源管理, 消费电子产品, 便携式器材, 通信与网络