LM3405

更新时间： 2024-09-27 04:44:27

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
2页	447K
描述
550kHz/1.6MHz 1A Constant Current Buck Regulator for Powering LEDs

阅读下载

中文翻译

获取价格

数据手册

如果您发现信息不准确，欢迎纠错

LM3405 数据手册

ADVANCE INFORMATION

October 2006

LM3405

550kHz/1.6MHz 1A Constant Current Buck Regulator for

Powering LEDs

General Description

Features

n Thin SOT23-6 package

Integrated with a 1A power switch, the LM3405 is a current

mode control switching buck regulator designed to provide a

simple, high efficiency solution for driving LEDs. With a 0.2V

reference voltage feedback control to minimize power dissi-

pation, an external resistor sets the current as needed for

driving various types of LEDs. Switching frequency is inter-

nally set to 550kHz (LM3405-Y) or 1.6MHz (LM3405-X),

allowing small surface mount inductors and capacitors to be

used. The LM3405 utilizes current mode control and internal

compensation offering ease of use and predictable, high

performance regulation over a wide range of operating con-

ditions. Additional features include user accessible enable/

dim pin for enabling and PWM dimming of LEDs, thermal

shutdown, current limit and over voltage protection.

n 4.0V to 20V input voltage range

n 550kHz (LM3405Y) and 1.6MHz (LM3405X)

switching frequencies

n 300mΩ NMOS switch

n 30nA shutdown current

n Enable/DIM input for enabling and PWM dimming of

LEDs

n Requires only low value, ceramic capacitors

n Input voltage UVLO

n Internally compensated current mode control

n Thermal shutdown

Applications

n LED Driver

n Constant Current Source

Typical Application Circuit

20178901

Connection Diagrams

20178905

6-Lead TSOT

20178960

Pin 1 Indentification

NS Package Number MK06A

DS201789

www.national.com

中文翻译

下载PDF

与LM3405相关器件

型号	品牌	获取价格	描述	数据表
LM340-5	ETC	获取价格	Analog IC
LM340-5.0MDA	NSC	获取价格	3-Terminal Positive Regulators
LM3405_07	NSC	获取价格	1.6MHz, 1A Constant Current Buck Regulator for Powering LEDs
LM3405_08	NSC	获取价格	Powering and Dimming High-Brightness LEDs with the LM3405 Constant-Current Buck Regulator
LM34058ABRG	LIGHTKEY	获取价格	3.40 inch 5x8 Dual Color Dot Matrix LED Display
LM34058ARG	LIGHTKEY	获取价格	3.40 inch 5x8 Dual Color Dot Matrix LED Display
LM34058AURUG	LIGHTKEY	获取价格	3.40 inch 5x8 Dual Color Dot Matrix LED Display
LM34058BRG	LIGHTKEY	获取价格	3.40 inch 5x8 Dual Color Dot Matrix LED Display
LM34058BURUG	LIGHTKEY	获取价格	3.40 inch 5x8 Dual Color Dot Matrix LED Display
LM3405A	NSC	获取价格	1.6MHz, 1A Constant Current Buck LED Driver with Internal Compensation in Tiny SOT23 Packa