APR346

Document number: DS38999 Rev. 6 - 2

1 of 11

www.diodes.com

May 2018

© Diodes Incorporated

APR346

SECONDARY SIDE SYNCHRONOUS RECTIFICATION CONTROLLER

Description

The APR346 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, the APR346

can output ideal drive signal with less external components. It can

provide high performance solution for 5V to 20V output voltage

application.

The APR346 is available in SOT26 package.

Features



Synchronous Rectification for CCM, DCM Operation Flyback



Eliminate Resonant Ring Interference



Fewest External Components



Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2)



Halogen and Antimony Free.

“Green” Device (Note 3)

Pin Assignments

(Top View)

AREF

DRISR

VDET

GND

VCC

CCM

1

2

3

4

5

Pin 1 Mark

6

SOT26

Applications



Adapters/Chargers for Cell/Cordless Phones, ADSL Modems,

MP3 and Other Portable Apparatus

Notes:

1. No purposely added lead. Fully EU Directive 2002/95/EC (RoHS), 2011/65/EU (RoHS 2) & 2015/863/EU (RoHS 3) compliant.

2. See https://www.diodes.com/quality/lead-free/

for more information about Diodes Incorporated’s definitions of Halogen- and Antimony-free, "Green"

and Lead-free.

3. Halogen- and Antimony-

free "Green” products are defined as those which contain <900ppm bromine, <900ppm chlorine (<1500ppm total Br + Cl) and

<1000ppm antimony compounds.

Typical Applications Circuit

Primary

Control

IC

APR346

1

4

6

3

5

AREF

GND

CCM

VDET

DRISR

VCC

2

D1

R1

R2

R3

C24

Q1

Q2

ZD1

ZD2