Datasheet > LM2585T-3.3

LM2585T-3.3

更新时间： 2024-01-17 15:26:50

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
25页	629K
描述
SIMPLE SWITCHER 3A Flyback Regulator

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数据手册

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LM2585T-3.3 数据手册

March 1998

LM2585

SIMPLE SWITCHER^®3A Flyback Regulator

General Description

Features

n Requires few external components

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 adjust-

able.

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 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

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 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

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

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

ages and output load conditions, is guaranteed for the power

supply system.

Flyback Regulator

DS012515-1

Ordering Information

Package Type

NSC Package

Drawing

T05D

Order Number

5-Lead TO-220 Bent, Staggered Leads

5-Lead TO-263

LM2585T-3.3, LM2585T-5.0, LM2585T-12, LM2585T-ADJ

LM2585S-3.3, LM2585S-5.0, LM2585S-12, LM2585S-ADJ

TS5B

5-Lead TO-263 Tape and Reel

TS5B

LM2585SX-3.3, LM2585SX-5.0, LM2585SX-12,

LM2585SX-ADJ

™

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

DS012515

www.national.com

12 3 4 5 6 7...25

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与LM2585T-3.3相关器件

型号	品牌	获取价格	描述	数据表
LM2585T-3.3/NOPB	TI	获取价格	LM2585 SIMPLE SWITCHERÂ® 3A Flyback Regulator
LM2585T-5.0	NSC	获取价格	SIMPLE SWITCHER 3A Flyback Regulator
LM2585T-5.0/NOPB	TI	获取价格	LM2585 SIMPLE SWITCHERÂ® 3A Flyback Regulator
LM2585T-ADJ	NSC	获取价格	SIMPLE SWITCHER 3A Flyback Regulator
LM2585T-ADJ	TI	获取价格	LM2585 SIMPLE SWITCHERÂ® 3A Flyback Regulator
LM2585T-ADJ/NOPB	NSC	获取价格	IC 7 A SWITCHING REGULATOR, 125 kHz SWITCHING FREQ-MAX, PZFM5, ROHS COMPLIANT, BENT STAGGE
LM2585T-ADJ/NOPB	TI	获取价格	LM2585 SIMPLE SWITCHERÂ® 3A Flyback Regulator
LM2586	NSC	获取价格	SIMPLE SWITCHER 3A Flyback Regulator with Shutdown
LM2586	TI	获取价格	LM2586 SIMPLE SWITCHER 3A Flyback Regulator with Shutdown
LM2586_05	NSC	获取价格	SIMPLE SWITCHER㈢ 3A Flyback Regulator with Sh

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