IR1161LTRPBF

The IR1161 is a synchronous rectification control IC designed to drive an N-Channel power MOSFET in a secondary output rectifier circuit. The MOSFET gate is switched on and off to bypass its body diode during the of the conduction period to minimize power dissipation, remaining off during the blocking period. The drain to source voltage is accurately sensed to determine the direction and magnitude of the current allowing the IR1161 to turn the MOSFET on and off at close to zero current. An integrated cycle-by-cycle minimum on time (MOT) protection circuit automatically detects a no load condition and turns off the gate driver output preventing negative current from flowing through the MOSFET. Ruggedness and noise immunity are accomplished using an advanced blanking scheme and double-pulse suppression, which allows reliable operation in all operating modes.

• Secondary side synchronous rectification controller
• DCM, CrCM Flyback and resonant half-bridge topologies
• Direct sensing of MOSFET drain voltage up to 200V
• Max 500kHz switching frequency
• Anti-bounce logic and UVLO protection
• Micropower start-up & ultra-low quiescent current
• 50ns turn-off propagation delay
• Programmable Minimum On Time
• Vcc Operating voltage range 4.75V to 18V
• Cycle by Cycle MOT Check Circuit ? Lead-free
• Compatible with 0.3W Standby, Energy Star, CECP, etc