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LT3752/LT3752-1 - Active Clamp Synchronous Forward Controllers with Internal Housekeeping Controller

The LT®3752/LT3752-1 are current mode PWM controllers optimized for an active clamp forward converter topology. A DC/DC housekeeping controller is included for improved efficiency and performance. The LT3752 allows operation up to 100V input and the LT3752-1 is optimized for applications with input voltages greater than 100V.

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 LT3752/LT3752-1 are available in a 38-lead plastic TSSOP package with missing pins for high voltage spacings.

Features Input Voltage Range: LT3752: 6.5V to 100V, LT3752-1:Limited Only by External Components Internal Housekeeping DC/DC Controller Programmable Volt-Second Clamp High Efficiency Control: Active Clamp, Synchronous Rectification, Programmable Delays Short-Circuit (Hiccup Mode) Overcurrent Protection Programmable Soft-Start/Stop Programmable OVLO and UVLO with Hysteresis Programmable Frequency (100kHz to 500kHz) Synchronizable to an External Clock Typical Application

Applications Offline and HV Car Battery Isolated Power Supplies 48V Telecommunication Isolated Power Supplies Industrial, Automotive and Military Systems Packaging

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