APR34150 Datasheet, PDF (1/10 Pages) Diodes Incorporated – SECONDARY SIDE SYNCHRONOUS RECTIFICATION SWITCHER

APR34150
SECONDARY SIDE SYNCHRONOUS RECTIFICATION SWITCHER
Description
APR34150 is a secondary side Combo IC, which combines an N-
Channel MOSFET and a driver circuit designed for synchronous
rectification (SR) in DCM operation.
The N-Channel MOSFET has been optimized for low gate charge,
low RDS(ON), fast switching speed and body diode reverse recovery
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, APR34150 can output
ideal drive signal with less external components. It can provide high
performance solution for 5V output voltage application.
The APR34150 is available in SO-8 package.
Pin Assignments
(Top View)
DRISR 1
VDET 2
AREF 3
VCC 4
SO-8
8 DRAIN
7 DRAIN
6 GND
5 GND
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)
Applications
• Adapters/Chargers for Cell/Cordless Phones, ADSL Modems, MP3
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 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
C23 _R21
C21 C22
++
R23
APR34150
DRAIN
GND
DRAIN
GND
VDET
VCC
DRISR
AREF
R_AREF
R24
C24
C_AREF
APR34150
Document number: DS37985 Rev. 2 - 2
1 of 10
www.diodes.com
October 2015
© Diodes Incorporated