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Synchronous Controller

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The ZXGD3103 is intended to drive MOSFETS configured as ideal diode replacements. The device is comprised of a differential amplifier detector stage and high current driver. The detector monitors the reverse voltage of the MOSFET such that if body diode conduction occurs a positive voltage is applied to the MOSFET’s Gate pin. Once the positive voltage is applied to the Gate the MOSFET switches on allowing reverse current low. The detectors’ output voltage is then proportional to the MOSFET Drain-Source reverse voltage drop and this is applied to the Gate via the driver. This action provides a rapid turn off as current decays.


  • Flyback Converters in:
  • Adaptors
  • LCD Monitors
  • Server PSU’s
  • Set Top Boxes
  • LCD TV
  • Resonant Converters
  • LED TV
  • High power Adaptors
  • Street Lighting
  • ATX psu

Product Specifications

Product Parameters

AEC Qualified Yes
Compliance (Only Automotive supports PPAP) Standard
Supply Voltage VCC (V) 15 V
Quiesent Supply Current (mA) 5.16 mA
Drain Voltage V(V) 180 V
Mode of Operation DCM CrCM CCM
Switching Frequency (kHz) ≤250 kHz
Proportional Gate Drive Control (Y|N) Yes
Turn-On Time TON (ns) 150 ns
Turn-OffThresholdVoltage (mV) 10 mV
Turn-Off Delay Time TOFF (ns) 15 ns
Gate Source Current ISOURCE (A) 2.5 A
Gate Sink Current ISINK (A) 6 A

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Technical Documents

Evaluation Boards and User Guides

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