APR340

Document number: DS43230 Rev. 3 - 2

1 of 9

www.diodes.com

May 2021

© Diodes Incorporated

APR340

SECONDARY SIDE SYNCHRONOUS RECTIFICATION CONTROLLER

Description

The APR340 is a secondary side MOSFET driver for synchronous

rectification in DCM operation.

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

APR340 can output ideal drive signal with less external components.

The APR340 is available in the SOT26 package.

Features



Synchronous Rectification for 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)



For automotive applications requiring specific change

control (i.e. parts qualified to AEC-Q100/101/200, PPAP

capable, and manufactured in IATF 16949 certified facilities),

please contact us or your local Diodes representative.

https://www.diodes.com/quality/product-definitions/

Pin Assignments

(Top View)

AREF

DRISR

VDET

GND

VCC

VDD

1

2

3

4

5

P in 1 M a rk

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

+

C20

GND

VDET

DRISR

VCC

AREF

T1

Q2

APR340

2

1

3

4

6

C24

RAREF

CAREF

VDD

C23

5

Pin 1 Mark