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The APR34709 is a secondary side Combo IC, which combines an N-Channel MOSFET and a driver circuit designed for Synchronous Rectification (SR), supports DCM and Quasi-Resonant Flyback Topologies.

The N-Channel MOSFET is optimized for low gate charge, low RDS(ON), fast switching speed and body diode reverse recovery performance.

The synchronous rectification can effectively reduce the secondary side rectifier power dissipation and provide high performance solution.
By sensing MOSFET drain-to-source voltage, the APR34709 can output ideal drive signal with less external components.

It can provide high performance solution for 3.3V to 15V output voltage application.

The APR34709 is available in SO-8EP package.


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


• Synchronous Rectification for DCM Operation Flyback
• Eliminate Resonant Ring Interference
• Fast Detector of Supply Voltages
• Fewest External Components

Product Specifications

Product Parameters

Internal Trigger Voltage N/A V
VCC Max 28
Operating Current 150 µA
Turn-Off Threshold Voltage -5 mV
Min On-Time (ns) N/A
Turn-Off Delay 100 ns
Drain Rating 60 V
Switching FET 8

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Orderable Part Number Buy from Distributor / Contact Sales Request Samples


Authorized Distributor Quantity Inventory Date Countries/Regions Buy Online
Digi-Key Electronics 3990 3/2/2021 Europe, Asia, North America Buy Now
Mouser Electronics Inc. 4000 3/2/2021 South America, North America, Asia, Europe, Middle East Buy Now
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