Secondary-Side MOSFET Integrated Synchronous Rectifier Controller for Flyback Converters

  HL9760 Main Photo   HL9760 Second alternate photo


The HL9760 is part of the flyback synchronous rectifier controller family of devices integrated with MOSFET. It is a flyback converter that supports operation in discontinuous conduction mode (DCM), quasi-resonant (QR), and continuous conduction mode (CCM). The control circuitry turns on the gate of synchronous rectification (SR) MOSFET in forward mode and turns off the gate when the SR MOSFET current drops to certain value. The HL9760 integrates the gate clamp circuitry to pull down the gate when the parasitic of MOSFET causes the mis-triggered turn on of the SR MOSFET during startup, which increases the reliability of the system.


  • Integrated 8mΩ Rds(on) MOSFET
  • Compatibility of continuous conduction mode (CCM), quasi-resonant (QR), and discontinuous conduction mode (DCM)
  • Wide input voltage ranges up to 28V
  • Optimized SR gate turn-off threshold control
  • Proprietary CCM SR turn-off control algorithm
  • Minimized SR turn-on/off propagation delay
  • SR MOSFET gate passive clamp
  • Low power saving mode
  • Highly efficient QFN5x6 package

For more information or a full datasheet request, please contact the factory at sales@elevationsemiconductor.com.