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NCP1252BDR2G Datasheet(PDF) 1 Page - ON Semiconductor |
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NCP1252BDR2G Datasheet(HTML) 1 Page - ON Semiconductor |
1 / 18 page © Semiconductor Components Industries, LLC, 2011 July, 2011 − Rev. 4 1 Publication Order Number: NCP1252/D NCP1252 Current Mode PWM Controller for Forward and Flyback Applications The NCP1252 controller offers everything needed to build cost− effective and reliable ac−dc switching supplies dedicated to ATX power supplies. Thanks to the use of an internally fixed timer, NCP1252 detects an output overload without relying on the auxiliary Vcc. A Brown−Out input offers protection against low input voltages and improves the converter safety. Finally a SOIC8 package saves PCB space and represents a solution of choice in cost sensitive project. Features • Peak Current Mode Control • Adjustable Switching Frequency up to 500 kHz • Jittering Frequency ±5% of the Switching Frequency • Latched Primary Over Current Protection with 10 ms Fixed Delay • Delayed Operation Upon Start−up via an Internal Fixed Timer • Adjustable Soft−start Timer • Auto−recovery Brown−Out Detection • UC384X−like UVLO Thresholds • Vcc Range from 9 V to 28 V with Auto−recovery UVLO • Internal 160 ns Leading Edge Blanking • Adjustable Internal Ramp Compensation • +500 mA / –800 mA Source / Sink Capability • Maximum 50% Duty Cycle: A Version • Maximum 80% Duty Cycle: B Version • Maximum 65% Duty Cycle: C Version • Ready for Updated No Load Regulation Specifications • SOIC−8 and PDIP−8 Packages • These are Pb−Free Devices Typical Applications • Power Supplies for PC Silver Boxes, Games Adapter... • Flyback and Forward Converter SOIC−8 CASE 751 SUFFIX D PIN CONNECTIONS MARKING DIAGRAMS (Top View) OFFLINE CONTROLLER http://onsemi.com 1 8 x = A, B or C Version A = Assembly Location L, WL = Wafer Lot Y, YY = Year W, WW = Work Week G or G = Pb−Free Package 1252x ALYWX G 1 8 See detailed ordering and shipping information in the package dimensions section on page 16 of this data sheet. ORDERING INFORMATION SS VCC DRV GND FB BO CS RT 1 PDIP−8 CASE 626 SUFFIX P 1252AP AWL YYWWG |
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