Diodes Incorporated — Analog and discrete power solutions
SOT25

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APR343 (NRND)

NRND = Not Recommended for New Design

Secondary Side Synchronous Rectification Controller

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Description

APR343 is a secondary side MOSFET driver for synchronous rectification in DCM operation, which integrates the output voltage detection function for primary side control system.


The synchronous rectification can effectively reduce the secondary side rectifier power dissipation and provide high performance solution. By sensing MOSFET drain-to-source voltage, APR343 can output ideal drive signal with less external components. It can provide high performance solution for 5V output voltage application.


Same as AP4341, APR343 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, APR343 can effectively improve the transient performance of primary side control system.


The APR343 is available in SOT25 package.

Feature(s)

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

Application(s)

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

Product Specifications

Product Parameters

Internal MOSFETDrain Rating (V) 50
No-loadTriggerVoltage (V) 5.3
Min On-Time (ns) 1800
OperatingCurrent (µA) 100
Internal MOSFET Rds(on)(MΩ) External
Turn-OffDelay (ns) 100
Turn-OffThresholdVoltage (mV) -12.5
VCC Maximum Rating 6

Related Content

Packages

Technical Documents

Recommended Soldering Techniques

TN1.pdf

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-2642 2023-09-05 2024-03-05 Device End of Life (EOL)