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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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LM2587 bảng dữ liệu(PDF) 1 Page - National Semiconductor (TI) |
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LM2587 bảng dữ liệu(HTML) 1 Page - National Semiconductor (TI) |
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1 / 26 page  LM2587 SIMPLE SWITCHER® 5A Flyback Regulator General Description The LM2587 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 5.0A 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 a 100 kHz fixed-frequency internal oscillator that permits the use of small magnetics. Other features include soft start mode to reduce in-rush current during start up, cur- rent mode control for improved rejection of input voltage and output load transients and cycle-by-cycle current limiting. An output voltage tolerance of ±4%, within specified input volt- ages 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 5.0A, can stand off 65V n Wide input voltage range: 4V to 40V n Current-mode operation for improved transient response, line regulation, and current limit n 100 kHz switching frequency 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 Multiple-output regulator n Simple boost regulator n Forward converter Flyback Regulator Ordering Information Package Type NSC Package Order Number Drawing 5-Lead TO-220 Bent, Staggered Leads T05D LM2587T-3.3, LM2587T-5.0, LM2587T-12, LM2587T-ADJ 5-Lead TO-263 TS5B LM2587S-3.3, LM2587S-5.0, LM2587S-12, LM2587S-ADJ 5-Lead TO-263 Tape and Reel TS5B LM2587SX-3.3, LM2587SX-5.0, LM2587SX-12, LM2587SX-ADJ SIMPLE SWITCHER® and Switchers Made Simple® are registered trademarks of National Semiconductor Corporation. DS012316-1 April 1998 © 1999 National Semiconductor Corporation DS012316 www.national.com |
Số phần tương tự - LM2587 |
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Mô tả tương tự - LM2587 |
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