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NCP4331

ON Semiconductor
Part Number NCP4331
Manufacturer ON Semiconductor
Description Synchronous Buck Controller
Published May 4, 2009
Detailed Description NCP4331 Synchronous Buck Controller for High Efficiency Post Regulation The NCP4331 houses a dual MOSFET driver intende...
Datasheet PDF File NCP4331 PDF File

NCP4331
NCP4331

Overview
NCP4331 Synchronous Buck Controller for High Efficiency Post Regulation The NCP4331 houses a dual MOSFET driver intended to be used as a companion chip in ac-dc or dc-dc multi-output post regulated power supplies.
Directly fed by the secondary ac signal, the device keeps power dissipation to the lowest while reducing external component count.
Further, the implementation of N-channel MOSFETs gives NCP4331-based applications a significant advantage in terms of efficiency.
Features •ăHigh Gate Drive Capability •ăBootstrap for N-MOSFET High-Side Drive •ăTwo Embedded Error Amplifiers Allowing Constant Current Constant Voltage (CCCV) Operation •ă±1.
5% Regulation Voltage Reference Over 0°C to 85°C Temperature Range •ăProgrammable Soft-Start •ăThermal Shutdown for Overtemperature Protection •ăPWM Operation Synchronized to the Converter Frequency •ăOver-Lap Management for Soft Switching •ăInternal Regulator to Ease the Circuit Feeding •ăUndervoltage Detection •ăThese are Pb-Free Devices Typical Applications •ăOff-line Switch Mode Power Supplies •ăPower Dc-dc Converters •ăEfficient Alternative to Mag-Amp Post-Regulators http://onsemi.
com MARKING DIAGRAMS 16 1 SO-16 D SUFFIX CASE 751B 16 NCP4331G ALYYWW 1 16 16 NCP 1 TSSOP-16 DB SUFFIX CASE 948F 4331 ALYWG G 1 A = Assembly Location L = Wafer Lot YY = Year WW = Work Week G or G = Pb-Free Package (Note: Microdot may be in either location) PIN CONNECTIONS CSout 1 CSin- 2 CSin+ 3 UVP/STDWN 4 COMP 5 FB 6 SS/Dmax 7 Cramp 8 16 VCC 15 BST 14 HS_DRV 13 HB 12 VDD 11 LS_DRV 10 GND 9 SYNC (Top View) ORDERING INFORMATION Device Package NCP4331DR2G SOIC-16 (Pb-Free) NCP4331DBR2G TSSOP-16 (Pb-Free) Shipping 2500 / Tape & Reel 2500 / Tape & Reel †For information on tape and reel specifications, including part orientation and tape sizes, please refer to our Tape and Reel Packaging Specifications Brochure, BRD8011/D.
©Ă Semiconductor Components Industries, LLC, 2008 January, 2008 - Rev.
0 1 Publication Order Number:...


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