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Secondary Side Synchronous Rectification Switcher

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APR3415 is a secondary side Combo IC, which combines an NChannel MOSFET and a driver circuit designed for synchronous rectification (SR) in DCM operation. It also integrates output voltage detect function for primary side control system.
The N-Channel MOSFET has been 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, APR3415 can output ideal drive signal with less external components. It can provide high performance solution for 5V output voltage application. Same as AP4341, APR3415 detects the output voltage and provides a periodical signal when the output voltage is lower than a certain threshold. By fast response to secondary side voltage, APR3415 can effectively improve the transient performance of primary side control system.
The APR3415 is available in SO-8 package.


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


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

Product Specifications

Product Parameters

InternalTriggerVoltage (V) 5.3 V
VCC Max (V) 6
OperatingCurrent (µA) 100 µA
Turn-OffThresholdVoltage (mV) -12.5 mV
Min On-Time (ns) 1800
Turn-OffDelay (ns) 100 ns
DrainRating (V) 50 V
SwitchingFET 15

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Orderable Part Number Buy from Distributor / Contact Sales Request Samples


Authorized Distributor Quantity Inventory Date Countries/Regions Buy Online
Mouser Electronics Inc. 3910 6/25/2022 South America, North America, Asia, Europe, Middle East Buy Now
Request Sample


Authorized Distributor Quantity Inventory Date Countries/Regions Buy Online
Digi-Key Electronics 2607 6/25/2022 Europe, Asia, North America Buy Now
Request Sample

Product Change Notices (PCNs)

A PCN may only apply to specific orderable part numbers in this datasheet. Please refer to the corresponding PCN to see the exact orderable part number(s) affected.

PCN # Issue Date Implementation Date Subject
PCN-2381 2018-10-25 2019-01-25 Qualification of Additional FAB & A/T Source, and/or Bill of Materials (BOM) for Select Products
PCN-2353 2018-06-12 2018-09-12 Qualification of Alternate Wafer Source for MOSFET Die used in Select Analog Products