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NCP1200D40R2

製品説明
仕様・特性

NCP1200 PWM Current-Mode Controller for Low-Power Universal Off-Line Supplies Housed in SOIC-8 or PDIP-8 package, the NCP1200 represents a major leap toward ultra-compact Switchmode Power Supplies. Due to a novel concept, the circuit allows the implementation of a complete offline battery charger or a standby SMPS with few external components. Furthermore, an integrated output short- circuit protection lets the designer build an extremely low-cost AC-DC wall adapter associated with a simplified feedback scheme. With an internal structure operating at a fixed 40 kHz, 60 kHz or 100 kHz, the controller drives low gate-charge switching devices like an IGBT or a MOSFET thus requiring a very small operating power. Due to current-mode control, the NCP1200 drastically simplifies the design of reliable and cheap offline converters with extremely low acoustic generation and inherent pulse-by-pulse control. When the current setpoint falls below a given value, e.g. the output power demand diminishes, the IC automatically enters the skip cycle mode and provides excellent efficiency at light loads. Because this occurs at low peak current, no acoustic noise takes place. Finally, the IC is self-supplied from the DC rail, eliminating the need of an auxiliary winding. This feature ensures operation in presence of low output voltage or shorts. Features •ăNo Auxiliary Winding Operation •ăInternal Output Short-Circuit Protection •ăExtremely Low No-Load Standby Power •ăCurrent-Mode with Skip-Cycle Capability •ăInternal Leading Edge Blanking •ă250 mA Peak Current Source/Sink Capability •ăInternally Fixed Frequency at 40 kHz, 60 kHz and 100 kHz •ăDirect Optocoupler Connection •ăBuilt-in Frequency Jittering for Lower EMI •ăSPICE Models Available for TRANsient and AC Analysis •ăInternal Temperature Shutdown •ăPb-Free Packages are Available http://onsemi.com MARKING DIAGRAMS 8 200Dy ALYW G SOIC-8 D SUFFIX CASE 751 8 1 1 8 PDIP-8 P SUFFIX CASE 626 1200Pxxx AWL YYWWG 8 1 1 xxx y = Device Code: 40, 60 or 100 = Device Code: 4 for 40 6 for 60 1 for 100 A = Assembly Location L = Wafer Lot Y, YY = Year W, WW = Work Week G, G = Pb-Free Package PIN CONNECTIONS Adj 1 8 HV FB 2 7 NC CS 3 6 VCC GND 4 5 Drv (Top View) Typical Applications •ăAC-DC Adapters •ăOffline Battery Chargers •ăAuxiliary/Ancillary Power Supplies (USB, Appliances, TVs, etc.) ©Ă Semiconductor Components Industries, LLC, 2007 May, 2007 - Rev. 16 1 ORDERING INFORMATION See detailed ordering and shipping information in the package dimensions section on page 14 of this data sheet. Publication Order Number: NCP1200/D

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