Datasheet > LM2586_05

LM2586_05

更新时间： 2024-01-02 03:24:11

品牌	Logo	应用领域
美国国家半导体 - NSC		稳压器
页数	文件大小	规格书
30页	1265K
描述
SIMPLE SWITCHER㈢ 3A Flyback Regulator with Shutdown

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数据手册

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LM2586_05 数据手册

July 2005

LM2586

SIMPLE SWITCHER^®3A Flyback Regulator with

Shutdown

General Description

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

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 ad-

justable.

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

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 regu-

lators. Also listed are selector guides for diodes and capaci-

tors and a family of standard inductors and flyback trans-

formers 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.

Typical Applications

n Flyback regulator

n Forward converter

n Multiple-output regulator

n Simple boost regulator

Other features include soft start mode to reduce in-rush

current during start up, and current mode control for im-

proved rejection of input voltage and output load transients

and cycle-by-cycle current limiting. The device also has a

shutdown pin, so that it can be turned off externally. An

output voltage tolerance of 4%, within specified input volt-

ages and output load conditions, is guaranteed for the power

supply system.

Connection Diagrams

Bent, Staggered Leads

7-Lead TO-220 (T)

Top View

Bent, Staggered Leads

7-Lead TO-220 (T)

Side View

01251618

01251617

Order Number LM2586T3.3, LM2586T-5.0,

LM2586T-12 or LM2586T-ADJ

See NS Package Number TA07B

SIMPLE SWITCHER^®and Switchers Made Simple are registered trademarks of National Semiconductor Corporation.

DS012516

www.national.com

12 3 4 5 6 7...30

中文翻译

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与LM2586_05相关器件

型号	品牌	获取价格	描述	数据表
LM2586-12MDC	NSC	获取价格	IC 7 A SWITCHING REGULATOR, 200 kHz SWITCHING FREQ-MAX, UUC, DIE, Switching Regulator or C
LM2586-5.0MWC	NSC	获取价格	IC 7 A SWITCHING REGULATOR, 200 kHz SWITCHING FREQ-MAX, UUC, WAFER, Switching Regulator or
LM2586S-12	NSC	获取价格	SIMPLE SWITCHER 3A Flyback Regulator with Shutdown
LM2586S-12	TI	获取价格	LM2586 SIMPLE SWITCHER 3A Flyback Regulator with Shutdown
LM2586S-12/NOPB	TI	获取价格	具有频率同步功能的 4V 至 40V、3A 升压宽输入电压反激式稳压器 \| KTW \| 7
LM2586S-3.3	TI	获取价格	LM2586 SIMPLE SWITCHER 3A Flyback Regulator with Shutdown
LM2586S-3.3	NSC	获取价格	SIMPLE SWITCHER 3A Flyback Regulator with Shutdown
LM2586S-3.3/NOPB	TI	获取价格	具有频率同步功能的 4V 至 40V、3A 升压宽输入电压反激式稳压器 \| KTW \| 7
LM2586S-5.0	NSC	获取价格	SIMPLE SWITCHER 3A Flyback Regulator with Shutdown
LM2586S-5.0	TI	获取价格	LM2586 SIMPLE SWITCHER 3A Flyback Regulator with Shutdown

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