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công cụ tìm kiếm bảng dữ liệu linh kiện điện tử |
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công cụ tìm kiếm bảng dữ liệu linh kiện điện tử |
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LM2586 bảng dữ liệu(PDF) 1 Page - National Semiconductor (TI) |
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LM2586 bảng dữ liệu(HTML) 1 Page - National Semiconductor (TI) |
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1 / 28 page  LM2586 SIMPLE SWITCHER® 3A Flyback Regulator with Shutdown General Description The LM2586 series of regulators are monolithic integrated circuits specifically designed for flyback, step-up (boost), and forward converter applications. The device is available in 4 different output voltage versions: 3.3V, 5.0V, 12V, and adjust- able. Requiring a minimum number of external components, these regulators are cost effective, and simple to use. Included in the datasheet are typical circuits of boost and flyback regula- tors. Also listed are selector guides for diodes and capacitors and a family of standard inductors and flyback transformers designed to work with these switching regulators. The power switch is a 3.0A NPN device that can stand-off 65V. Protecting the power switch are current and thermal limiting circuits, and an undervoltage lockout circuit. This IC contains an adjustable frequency oscillator that can be pro- grammed up to 200 kHz. The oscillator can also be synchro- nized with other devices, so that multiple devices can oper- ate at the same switching frequency. Other features include soft start mode to reduce in-rush cur- rent during start up, and current mode control for improved rejection of input voltage and output load transients and cycle-by-cycle current limiting. The device also has a shut- down pin, so that it can be turned off externally. An output voltage tolerance of ±4%, within specified input voltages and output load conditions, is guaranteed for the power supply system. Features n Requires few external components n Family of standard inductors and transformers n NPN output switches 3.0A, can stand off 65V n Wide input voltage range: 4V to 40V n Adjustable switching frequency: 100 kHz to 200 kHz n External shutdown capability n Draws less than 60 µA when shut down n Frequency synchronization n Current-mode operation for improved transient response, line regulation, and current limit n Internal soft-start function reduces in-rush current during start-up n Output transistor protected by current limit, under voltage lockout, and thermal shutdown n System output voltage tolerance of ±4% max over line and load conditions Typical Applications n Flyback regulator n Forward converter n Multiple-output regulator n Simple boost regulator Flyback Regulator SIMPLE SWITCHER® and Switchers Made Simple ® are registered trademarks of National Semiconductor Corporation. DS012516-1 May 1996 © 1999 National Semiconductor Corporation DS012516 www.national.com |
Số phần tương tự - LM2586 |
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Mô tả tương tự - LM2586 |
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