Datasheet > LM2585_07

LM2585_07

更新时间： 2024-02-12 01:18:19

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
28页	982K
描述
SIMPLE SWITCHER㈢ 3A Flyback Regulator

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中文翻译

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数据手册

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LM2585_07 数据手册

February 2007

LM2585

SIMPLE SWITCHER^®3A Flyback Regulator

General Description

Features

The LM2585 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.

Requires few external components

■

Family of standard inductors and transformers

NPN output switches 3.0A, can stand off 65V

Wide input voltage range: 4V to 40V

■

Current-mode operation for improved transient response,

line regulation, and current limit

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.

100 kHz switching frequency

■

Internal soft-start function reduces in-rush current during

start-up

Output transistor protected by current limit, under voltage

lockout, and thermal shutdown

System Output Voltage Tolerance of ±4% max over line

and load conditions

■

The power switch is a 3.0A NPN device that can stand-off

65V. Protecting the power switch are current and thermal lim-

iting 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.

Typical Applications

Flyback regulator

■

Multiple-output regulator

Simple boost regulator

Forward converter

Connection Diagrams

Bent, Staggered Leads

5-Lead TO-220 (T)

Top View

Bent, Staggered Leads

5-Lead TO-220 (T)

Side View

1251515

1251514

Order Number LM2585T-3.3, LM2585T-5.0,

LM2585T-12 or LM2585T-ADJ

See NS Package Number T05D

5-Lead TO-263 (S)

Top View

5-Lead TO-263 (S)

Side View

1251517

1251516

Order Number LM2585S-3.3, LM2585S-5.0,

LM2585S-12 or LM2585S-ADJ

See NS Package Number TS5B

SIMPLE SWITCHER^®is a registered trademark of National Semiconductor Corporation

12515

www.national.com

12 3 4 5 6 7...28

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与LM2585_07相关器件

型号	品牌	获取价格	描述	数据表
LM2585_15	TI	获取价格	LM2585 SIMPLE SWITCHERÂ® 3A Flyback Regulator
LM2585S-12	NSC	获取价格	SIMPLE SWITCHER 3A Flyback Regulator
LM2585S-12/NOPB	NSC	获取价格	IC 7 A SWITCHING REGULATOR, 125 kHz SWITCHING FREQ-MAX, PSSO5, TO-263, 5 PIN, Switching Re
LM2585S-12/NOPB	TI	获取价格	LM2585 SIMPLE SWITCHERÂ® 3A Flyback Regulator
LM2585S-3.3	NSC	获取价格	SIMPLE SWITCHER 3A Flyback Regulator
LM2585S-3.3/NOPB	NSC	获取价格	IC 7 A SWITCHING REGULATOR, 125 kHz SWITCHING FREQ-MAX, PSSO5, TO-263, 5 PIN, Switching Re
LM2585S-3.3/NOPB	TI	获取价格	LM2585 SIMPLE SWITCHERÂ® 3A Flyback Regulator
LM2585S-5.0	NSC	获取价格	SIMPLE SWITCHER 3A Flyback Regulator
LM2585S-5.0/NOPB	NSC	获取价格	IC 7 A SWITCHING REGULATOR, 125 kHz SWITCHING FREQ-MAX, PSSO5, TO-263, 5 PIN, Switching Re
LM2585S-5.0/NOPB	TI	获取价格	LM2585 SIMPLE SWITCHERÂ® 3A Flyback Regulator

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