LTC3722-1 Datasheet | Linear Technology

Features n Adaptive or Manual Delay Control for Zero Voltage Switching Operation n Adjustable Synchronous Rectification Timing for Highest Efficiency n Adjustable Maximum ZVS Delay n Adjustable System Undervoltage Lockout Hysteresis n Programmable Leading Edge Blanking n Very Low Start-Up and Quiescent Currents n Current Mode (LTC3722-1) or Voltage Mode (LTC3722-2) Operation n Programmable Slope pensation n VCC UVLO and 25m A Shunt Regulator n 50m A Output Drivers n Soft-Start, Cycle-by-Cycle Current Limiting and Hiccup Mode Short-Circuit Protection n 5V, 15m A Low Dropout Regulator n 24-Pin Surface Mount GN Package APPLICATIONS n Telemunications, Infrastructure Power Systems n Distributed Power Architectures n Server Power Supplies LTC3722-1/LTC3722-2 Synchronous Dual Mode Phase Modulated Full Bridge Controllers DESCRIPTION The LTC®3722-1/LTC3722-2 phase-shift PWM controllers provide all of the control and protection functions necessary to implement a high efficiency, zero voltage switched (ZVS), full bridge power converter. Adaptive ZVS circuitry delays the turn-on signals for each MOSFET independent of internal and external ponent tolerances. Manual delay set mode enables secondary side control operation or direct control of switch turn-on delays. The LTC3722-1/LTC3722-2 feature adjustable synchronous rectifier timing for optimal efficiency. A UVLO program input provides accurate system turn-on and turn-off voltages. The LTC3722-1 Features peak current mode control with programmable slope pensation and leading edge blanking, while the LTC3722-2 employs voltage mode control. The LTC3722-1/LTC3722-2 feature extremely low operating and start-up currents. Both devices include a full range of protection Features and are available in the 24-pin surface mount GN package. All registered trademarks and trademarks are the property of their respective owners. TYPICAL APPLICATION 36V TO 72V R1 U1 U2 MA MC T1 LTC3722 MB MD L1 VOUT 12V L2...