SECONDARY SIDE SYNCHRONOUS RECTIFICATION CONTROLLER - Diodes
Description
NEW PRODUCT
APR347
SECONDARY SIDE SYNCHRONOUS RECTIFICATION CONTROLLER
Description
The APR347 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 APR347 can output ideal drive signal with less external components.
It can provide high performance solution for 3.
3V to 15V output voltage application.
The APR347 is available in 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)
Pin Assignments
(Top View) Pin 1 Mark
AREF 1 GND 2 VDET 3
6 DRISR 5 VDD 4 VCC
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
T1
+ C20 Q2
3 64
VDET DRISR VCC
APR347
AREF GND
VDD
5
12
C23
CAREF
RAREF
C24
APR347
Document number: DS41207 Rev.
3 - 2
1 of 10 www.
diodes.
com
March 2019
© Diodes Incorporated
Pin Descriptions
APR347
Pin Number 1 2 3 4 5 6
Pin Name AREF GND VDET VCC VDD DRISR
Function
Program a voltage reference with a resistor from AREF to GND, to enable synchronous rectification MOSFET drive signal
Ground
SR MOS drain-to-source voltage sense input, connected to drain pin of SR MOSFET through...
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