LTC3722-2

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 Compensation n VCC UVLO and 25mA Shunt Regulator n 50mA Output Drivers n Soft-Start, Cycle-by-Cycle Current Limiting and Hiccup Mode Short-Circuit Protection n 5V, 15mA Low Dropout Regulator n 24-Pin Surface Mount GN Package APPLICATIONS n Telecommunications, 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 component 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 ...