LT3752/LT3752-1
Active Clamp Synchronous
Forward Controllers with Internal
Housekeeping Controller
FEATURES DESCRIPTION Input Voltage Range: LT3752: 6.5V to 100V, LT3752-1:Limited Only by External Components
n Internal Housekeeping DC/DC Controller
n Programmable Volt-Second Clamp
n High Efficiency Control: Active Clamp, Synchronous Rectification, Programmable Delays
n Short-Circuit (Hiccup Mode) Overcurrent Protectio Programmable Soft-Start/Stop
n Programmable OVLO and UVLO with Hysteresis
n Programmable Frequency (100kHz to 500kHz)
n Synchronizable to an External Clock The LTВ®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. n 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. APPLICATIONS The LT3752/LT3752-1 are available in a 38-lead plastic
TSSOP package with missing pins for high voltage
spacings. Offline and HV Car Battery Isolated Power Supplies
n 48V Telecommunication Isolated Power Supplies …