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PDF APR34309CA Data sheet ( Hoja de datos )
| Número de pieza | APR34309CA | |
| Descripción | SECONDARY SIDE SYNCHRONOUS RECTIFICATION SWITCHER | |
| Fabricantes | Diodes | |
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APR34309CA
SECONDARY SIDE SYNCHRONOUS RECTIFICATION SWITCHER
Description
APR34309CA 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,
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, APR34309CA can
output ideal drive signal with less external components. It can provide
high performance solution for 5V output voltage application.
Same as AP4341, APR34309CA 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,
APR34309CA can effectively improve the transient performance of
primary side control system.
The APR34309CA is available in SO-8EP 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)
DRISR 1
VDET 2
AREF 3
VCC 4
8 GND
7 GND
6 GND
5 DRAIN
Note: The DRAIN pin of internal MOSFET is exposed PAD, which is at the bottom
of IC (the dashed box). The secondary current should flow from GND(pin 6,7,8) to
this exposed PAD.
SO-8EP
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
++
APR34309CA
R23
DRAINDRAIN GND
DRISR
GND
VDET
GND
CAREF
AREF
RAREF
VCC
R24
C24
APR34309CA
Document number: DS37672 Rev. 5 - 2
1 of 11
www.diodes.com
July 2015
© Diodes Incorporated
1 page  
Electrical Characteristics (@TA =+25°C, unless otherwise specified. Cont.)
MOSFET Static Characteristics
Parameters
Drain to Source Breakdown
Voltage
Gate Threshold Voltage
Zero Gate Voltage Drain
Current
Gate to Source Leakage
Current
Drain to Source On-state
Resistance
Symbol
VDSS(BR)
VGS(TH)
IDSS
IGSS
RDS(ON)
Conditions
VGS=0V, ID=0.25mA
VDS=VGS, ID=0.25mA
VDS=50V, VGS=0V
VGS=10V, VDS=0V
VGS=4.5V, ID=3A
Min
50
0.7
–
–
–
APR34309CA
Typ Max Unit
– 100 V
1.3 2
V
– 1 µA
–
±100
nA
8 – mΩ
MOSFET Dynamic Characteristics
Parameters
Symbol
Conditions
Min Typ Max Unit
Input Capacitance
Ciss
– 4149 –
Output Capacitance
Coss
VGS=0V, VDS=25V, f=1MHz
–
206
–
pF
Reverse Transfer Capacitance
Crss
– 159 –
Gate to Source Charge
Gate to Drain Charge (Miller
Charger)
Total Gate Charge
Qgs VGS=0V to 10V, VDD=25V,
Qgd ID=15A
Qg VGS=4.5V
– 10.3 –
– 8.4 –
– 39 –
nC
Gate Resistance
Rg –
– 1.8 –
Ω
APR34309CA
Document number: DS37672 Rev. 5 - 2
5 of 11
www.diodes.com
July 2015
© Diodes Incorporated
5 Page 
APR34309CA
IMPORTANT NOTICE
DIODES INCORPORATED MAKES NO WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, WITH REGARDS TO THIS DOCUMENT,
INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
(AND THEIR EQUIVALENTS UNDER THE LAWS OF ANY JURISDICTION).
Diodes Incorporated and its subsidiaries reserve the right to make modifications, enhancements, improvements, corrections or other changes
without further notice to this document and any product described herein. Diodes Incorporated does not assume any liability arising out of the
application or use of this document or any product described herein; neither does Diodes Incorporated convey any license under its patent or
trademark rights, nor the rights of others. Any Customer or user of this document or products described herein in such applications shall assume
all risks of such use and will agree to hold Diodes Incorporated and all the companies whose products are represented on Diodes Incorporated
website, harmless against all damages.
Diodes Incorporated does not warrant or accept any liability whatsoever in respect of any products purchased through unauthorized sales channel.
Should Customers purchase or use Diodes Incorporated products for any unintended or unauthorized application, Customers shall indemnify and
hold Diodes Incorporated and its representatives harmless against all claims, damages, expenses, and attorney fees arising out of, directly or
indirectly, any claim of personal injury or death associated with such unintended or unauthorized application.
Products described herein may be covered by one or more United States, international or foreign patents pending. Product names and markings
noted herein may also be covered by one or more United States, international or foreign trademarks.
This document is written in English but may be translated into multiple languages for reference. Only the English version of this document is the
final and determinative format released by Diodes Incorporated.
LIFE SUPPORT
Diodes Incorporated products are specifically not authorized for use as critical components in life support devices or systems without the express
written approval of the Chief Executive Officer of Diodes Incorporated. As used herein:
A. Life support devices or systems are devices or systems which:
1. are intended to implant into the body, or
2. support or sustain life and whose failure to perform when properly used in accordance with instructions for use provided in the
labeling can be reasonably expected to result in significant injury to the user.
B. A critical component is any component in a life support device or system whose failure to perform can be reasonably expected to cause the
failure of the life support device or to affect its safety or effectiveness.
Customers represent that they have all necessary expertise in the safety and regulatory ramifications of their life support devices or systems, and
acknowledge and agree that they are solely responsible for all legal, regulatory and safety-related requirements concerning their products and any
use of Diodes Incorporated products in such safety-critical, life support devices or systems, notwithstanding any devices- or systems-related
information or support that may be provided by Diodes Incorporated. Further, Customers must fully indemnify Diodes Incorporated and its
representatives against any damages arising out of the use of Diodes Incorporated products in such safety-critical, life support devices or systems.
Copyright © 2015, Diodes Incorporated
www.diodes.com
APR34309CA
Document number: DS37672 Rev. 5 - 2
11 of 11
www.diodes.com
July 2015
© Diodes Incorporated
11 Page | ||
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