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Secondary Side Synchronous Rectification Controller


APR345 is a secondary side MOSFET driver for synchronous rectification, supports CCM, DCM and Quasi-Resonant Flyback Topologies.

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, APR345 can output ideal drive signal with less external components. It can provide high performance solution for 5V to 12V output voltage application.

The APR345 is available in SOT26 package.


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


  • Synchronous Rectification for CCM, DCM Operation Flyback
  • Eliminate Resonant Ring Interference
  • Fewest External Components
  • Totally Lead-free & Fully RoHS Compliant
  • Halogen and Antimony Free. “Green” Device

Product Specifications

Product Parameters

Internal Trigger Voltage N/A V
VCC Max 16
Operating Current 250 µA
Turn-Off Threshold Voltage -11.5 mV
Min On-Time (ns) 1600
Turn-Off Delay 100 ns
Drain Rating 120 V
Switching FET External

Related Content

SOT26 (SC74R)


Quality & Reliability

Technical Documents

Evaluation Boards and User Guides

Recommended Soldering Techniques
Orderable Part Number Authorized Distributor Quantity Inventory Date Buy Online Region
APR34509MPTR-G1 Digi-Key Electronics 3904 8/24/2019 Buy Now United States
APR34509MPTR-G1 Mouser Electronics Inc. 3556 8/24/2019 Buy Now United States
APR345K6TR-G1 Digi-Key Electronics 4724 8/24/2019 Buy Now United States