Diodes Incorporated

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Back to Synchronous Rectification Controllers and Switchers


Optimizing for supporting Active Clamp Flyback Operation (ACF)

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The APR340 is a secondary side MOSFET driver for synchronous rectification in DCM operation. The synchronous rectification can effectively reduce the secondary side rectifier power dissipation and provide high performance solution. By sensing primary MOSFET gate-to-source voltage, the APR340 can output ideal drive signal with less external components. The APR340 is available in the SOT26 package.


  • Synchronous Rectification for DCM Operation Flyback
  • Eliminate Resonant Ring Interference
  • Fewest External Components
  • Totally Lead-Free & Fully RoHS Compliant 
  • Halogen- and Antimony-Free. “Green” Device 
  • For automotive applications requiring specific change
    control (i.e. parts qualified to AEC-Q100/101/200, PPAP
    capable, and manufactured in IATF 16949 certified facilities),
    please contact us or your local Diodes representative.


  • Adapters/Chargers for Cell/Cordless Phones, ADSL Modems,
    MP3 and Other Portable Apparatus

Product Specifications

Product Parameters

Operation Mode ACF
VCC Maximum Rating 28
OperatingCurrent (µA) 150 µA
Turn-OffThresholdVoltage (mV) -5 mV
Turn-OffDelay (ns) 100 ns
Release Date 202105

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