Active Clamp Synchronous Forward Controller

The LT3753 is a current mode PWM controller optimized for an active clamp forward converter topology, allowing up to 100V input operation.

A programmable volt-second clamp allows primary switch duty cycles above 50% for high switch, transformer and rectifier utilization. Active clamp control reduces switch voltage stress and increases efficiency. A synchronous output is available for controlling secondary side synchronous rectification.

The LT3753 is available in a 38-lead plastic TSSOP package with missing pins for high voltage spacings.

Applications

* Industrial, Automotive and Military Systems

* 48V Telecommunication Isolated Power Supplies

* Input Voltage Range: 8.5V to 100V

* Programmable Volt-Second Clamp

* High Efficiency Control: Active Clamp, Synchronous Rectification, Programmable Delays

* Short-Circuit (Hiccup Mode) Overcurrent Protection