APR345

Document number: DS38010 Rev. 5 - 2

1 of 11

www.diodes.com

June 2016

© Diodes Incorporated

APR345

SECONDARY SIDE SYNCHRONOUS RECTIFICATION CONTROLLER

Description

APR345 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, APR345 can

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

high performance solution for 5V to 12V output voltage application.

The APR345 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) compliant.

2. See http://www.diodes.com/quality/lead_free.html

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

APR345

1

4

6

3

5

AREF

GND

CCM

VDET

DRISR

VCC

2

D1

R1

R2

R3

R24

C24

Q1

Q2

ZD1

ZD2

R23