Diodes Incorporated

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Optimizing for supporting PWM controller with E-GaN driver

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The APR349 is a secondary-side MOSFET driver for synchronous rectification, which can effectively reduce the secondary-side rectifier power dissipation and provide a high-performance solution. The APR349 supports continuous or discontinuous conduction mode (CCM and DCM) and quasi-resonant flyback operation. It utilizes an intelligent control method to realize on-time control, which not only provides a short turn-on and turn-off delay to reduce power loss, but also eliminate the false trigger of resonant ring and keep safe operation without adding any external components or circuitry. The APR349 can be charged by internal PLR (Pulse Linear Regulator) at low system output voltage, and provide a wide output operation voltage from 3.3V to 24V. The APR349 is available in SOT26 (Type CJ) package.


  • Support Flyback Synchronous Rectification with CCM/DCM/QR Operation Mode
  • Intelligent Control to Minimize Turn-On and Turn-Off Delay
  • Smart-Blanking Control to Prevent Shoot-Through
  • Supports Both High-Side and Low-Side Application
  • Built-in PLR Power Supply for Low System Output Voltage
  • Internal UVLO Protection
  • 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. https://www.diodes.com/quality/product-definitions/ 


  • Adaptive Chargers for Cellular Phones, Digital Cameras, and Power Tools
  • AC/DC Adapters
  • Battery-Powered Systems
  • All SMPS with High-Efficiency Requirements

Product Specifications

Product Parameters

Operation Mode DCM/QR/CCM
VCC Maximum Rating 28
OperatingCurrent (µA) 215 µA
Turn-OffThresholdVoltage (mV) -7 mV
Turn-OffDelay (ns) 15 ns
Release Date 202107

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