• 简体中文
• English

LTC3722 - Synchronous Dual Mode Phase Modulated Full Bridge Controllers

The LTC3722-1/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 with programmable slope compensation 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.

Features Adaptive or Manual Delay Control for Zero Voltage Switching Operation Adjustable Synchronous Rectification Timing for Highest Efficiency Adjustable Maximum ZVS Delay Adjustable System Undervoltage Lockout Hysteresis Programmable Leading Edge Blanking Very Low Start-Up and Quiescent Currents Current Mode (LTC3722-1) or Voltage Mode (LTC3722-2) Operation Programmable Slope Compensation VCC UVLO and 25mA Shunt Regulator 50mA Output Drivers Soft-Start, Cycle-by-Cycle Current Limiting and Hiccup Mode Short-Circuit Protection 5V, 15mA Low Dropout Regulator 24-Pin Surface Mount GN Package Typical Application

Applications Telecommunications, Infrastructure Power Systems Distributed Power Architectures Server Power Supplies Packaging

Demo Boards