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LTC3722-1 - Phase Modulated Full Bridge Controllers

General 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.

Key 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 Li.