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NCP1205 Datasheet(PDF) 1 Page - ON Semiconductor |
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NCP1205 Datasheet(HTML) 1 Page - ON Semiconductor |
1 / 17 page © Semiconductor Components Industries, LLC, 2006 October, 2006 − Rev. 7 1 Publication Order Number: NCP1205/D NCP1205 Single Ended PWM Controller Featuring QR Operation and Soft Frequency Foldback The NCP1205 combines a true Current Mode Control modulator and a demagnetization detector to ensure full Discontinuous Conduction Mode in any load/line conditions and minimum drain voltage switching (Quasi−Resonant operation, also called critical conduction operation). With its inherent Variable Frequency Mode (VFM), the controller decreases its operating frequency at constant peak current whenever the output power demand diminishes. Associated with automatic multiple valley switching, this unique architecture guarantees minimum switching losses and the lowest power drawn from the mains when operating at no−load conditions. Thus, the NCP1205 is optimal for applications targeting the newest International Energy Agency (IEA) recommendations for standby power. The internal High−Voltage current source provides a reliable charging path for the VCC capacitor and ensures a clean and short startup sequence without deteriorating the efficiency once off. The continuous feedback signal monitoring implemented with an Overcurrent fault Protection circuitry (OCP) makes the final design rugged and reliable. The PDIP−14 offers an adjustable version of the OVP threshold via an external resistive network. Features • Natural Drain Valley Switching for Lower EMI and Quasi−Resonant Operation (QR) • Smooth Frequency Foldback for Low Standby and Minimum Ripple at Light−Load • Adjustable Maximum Switching Frequency • Internal 200 ns Leading Edge Blanking on Current Sense • 250 mA Sink and Source Driver • Wide Operating Voltages: 8.0 to 30 V • Wide UVLO Levels: 7.2 to 15 V Typical • Auto−Recovery Internal Short−Circuit Protection (OCP) • Integrated 3.0 mA Typ Startup Source • Current Mode Control • Adjustable Overvoltage Level • Pb−Free Packages are Available* Applications • High Power AC/DC Adapters for Notebooks, etc. • Offline Battery Chargers • Power Supplies for DVD, CD Players, TVs, Set−Top Boxes, etc. • Auxiliary Power Supplies (USB, Appliances, etc.) *For additional information on our Pb−Free strategy and soldering details, please download the ON Semiconductor Soldering and Mounting Techniques Reference Manual, SOLDERRM/D. MARKING DIAGRAM http://onsemi.com 1 8 1205P AWL YYWWG 1 8 A = Assembly Location WL = Wafer Lot YY, Y = Year WW = Work Week G = Pb−Free Package PDIP−8 N SUFFIX CASE 626 PDIP−14 P SUFFIX CASE 646 14 1 1 14 NCP1205P2 AWLYYWWG SOIC−16 D SUFFIX CASE 751B 16 1 NCP1205DG AWLYWW 16 1 Device Package Shipping† ORDERING INFORMATION NCP1205P PDIP−8 50 Units/Rail NCP1205P2 PDIP−14 25 Units/Rail NCP1205DR2 SOIC−16 2500/Tape & Reel NCP1205PG PDIP−8 (Pb−Free) 50 Units/Rail †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. NCP1205P2G PDIP−14 (Pb−Free) 25 Units/Rail NCP1205DR2G SOIC−16 (Pb−Free) 2500/Tape & Reel |
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Similar Description - NCP1205_06 |
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