Details, datasheet, quote on part number: APR34509MPTR-G1
CategorySemiconductors => Power Management ICs => Voltage Regulators & Voltage Controllers => Switching Controllers => 8844357
TitleSwitching Controllers ACDC Synch Rect Cont EP
CompanyDiodes, Inc.
DatasheetDownload APR34509MPTR-G1 datasheet
Product CategorySwitching Controllers
ManufacturerDiodes Incorporated
TopologyCCM, DCM, Flyback
Number of Outputs1 Output
Input Voltage3.3 V to 13 V
Output Voltage5 V to 12 V
Output Current20 A
Minimum Operating Temperature- 40 C
Maximum Operating Temperature+ 85 C
Mounting StyleSMD/SMT
PackagingCut Tape
BrandDiodes Incorporated
Description/FunctionSecondary side synchronous rectification switcher
Fall Time20 ns
Moisture SensitiveYes
Operating Supply Current100 uA
Operating Supply Voltage3.3 V to 13 V
ProductSecondary Side Controllers
Rise Time50 ns
ShutdownNo Shutdown
Factory Pack Quantity4000
APR34509MPTR-G1 photo


Features, Applications


The is a secondary side Combo IC, which combines an NChannel MOSFET and a driver circuit designed for synchronous rectification (SR), supports CCM, DCM and Quasi-Resonant Flyback Topologies. 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, the APR34509 can output ideal drive signal with less external components. It can provide high performance solution for to 12V output voltage application. The APR34509 is available in SO-8EP package.

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 7,8) toth is exposed PAD.

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 & 2) Halogen and Antimony Free. "Green" Device (Note 3)

Adapters/Chargers for Cell/Cordless Phones, ADSL Modems, MP3 and Other Portable Apparatus Standby and Auxiliary Power Supplies

1. No purposely added lead. Fully EU Directive 2002/95/EC (RoHS) & 2011/65/EU (RoHS 2) compliant. 2. See 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.

Pin Number 2 3 Pin Name DRISR VCC CCM VDET DRAIN AREF GND DRAIN Synchronous rectification MOSFET drive. Power supply, connected with system output. Primary trigger signal sense input. Synchronous rectification sense input and dynamic function output, connected to DRAIN through a resistor. Drain pin of internal MOSFET. The Drain voltage signal can obtain from this pin. Program a voltage reference with a resistor from AREF to GND, to enable synchronous rectification MOSFET drive signal. Source pin of internal MOSFET, connected to Ground. Drain pin of internal MOSFET. The secondary current should flow from GND (pin 8) to this DRAIN pad. Function

VCC 2 Test Mode Fault Mode Power OK VDD Regulator VREF DRAIN 5, EP

Symbol VCC VDET, VDRAIN VAREF, VDRISR ID Supply Voltage at VDET, DRAIN Pin Voltage at AREF, DRISR Pin Continuous Drain Current Pulsed Drain Current Power Dissipation +25 C Thermal Resistance (Junction to Ambient) (Note 5) Thermal Resistance (Junction to Case) (Note 5) Operating Junction Temperature Storage Temperature Lead Temperature (Soldering, 10 sec) Parameter Value +150 +300 Unit C/W C/W

4. Stresses greater than those listed under "Absolute Maximum Ratings" may cause permanent damage to the device. These are stres s ratings only, and functional operation of the device at these or any other conditions beyond those indicated under "Recommended Operating Conditions" is not implied. Exposure to "Absolute Maximum Ratings" for extended periods may affect device reliability. 5. FR-4 substrate PC board, 2oz copper, with 1 inch2 pad layout.

Symbol VCC TA Supply Voltage Ambient Temperature Parameter Min 3.3 -40 Max 13 +85 Unit C


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