LT3753
Active Clamp Synchronous
Forward Controller
FEATURES DESCRIPTION Input Voltage Range: 8.5V to 100V
nn Programmable Volt-Second Clamp
nn High Efficiency Control: Active Clamp,
Synchronous Rectification, Programmable Delays
nn Short-Circuit (Hiccup Mode) Overcurrent Protection
nn Programmable Soft-Start/Stop
nn Programmable OVLO and UVLO with Hysteresis
nn Programmable Frequency (100kHz to 500kHz)
nn Synchronizable to an External Clock The LTВ®3753 is a current mode PWM controller optimized
for an active clamp forward converter topology, allowing
up to 100V input operation. nn 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
nn 48V Telecommunication Isolated Power Supplies L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear
Technology Corporation. All other trademarks are the property of their respective owners. nn TYPICAL APPLICATION
36V to 72V, 5V/20A Active Clamp Isolated Forward Converter …