APR3415

Document number: DS36738 Rev. 7 - 2

1 of 13

www.diodes.com

June 2015

© Diodes Incorporated

APR3415

A Product Line of

Diodes Incorporated

SECONDARY SIDE SYNCHRONOUS RECTIFICATION SWITCHER

Description

APR3415 is a secondary side Combo IC, which combines an N-

Channel 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,

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.

Features

•

Synchronous Rectification for DCM Operation Flyback

•

Eliminate Resonant Ring Interference

•

Fast Detector of Supply Voltages

•

Fewest External Components



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



Halogen and Antimony Free.

“Green” Device (Note 3)

Pin Assignments

(Top View)

1

2

3

4

8

7

6

5

DRISR

VDET

AREF

VCC

DRAIN

DRAIN

GND

GND

SO-8

Applications

and Other Portable Apparatus

•

Standby and Auxiliary Power Supplies

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 f

or 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

+

C21

+

C22

APR3415

R24

VCC

AREF

DRAIN

DRAIN

GND

GND

VDET

DRISR

C23

R21

C24

R23