Datasheet > LM3405_07

LM3405_07

更新时间： 2024-02-19 09:59:03

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
20页	482K
描述
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_07 数据手册

February 2007

LM3405

1.6MHz, 1A Constant Current Buck Regulator for Powering

LEDs

General Description

Features

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 high power LEDs.

With a 0.205V reference voltage feedback control to minimize

power dissipation, an external resistor sets the current as

needed for driving various types of LEDs. Switching frequen-

cy is internally set to 1.6MHz, 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 conditions. Additional features

include user accessible EN/DIM pin for enabling and PWM

dimming of LEDs, thermal shutdown, cycle-by-cycle current

limit and over-current protection.

V_INoperating range of 3V to 15V

■

Thin SOT23-6 package

1.6MHz switching frequency

300mΩ NMOS switch

■

40nA shutdown current at V_IN= 5V

EN/DIM input for enabling and PWM dimming of LEDs

Internally compensated current-mode control

Cycle-by-cycle current limit

Input voltage UVLO

Over-current protection

Thermal shutdown

Applications

LED Driver

■

Constant Current Source

Industrial Lighting

LED Flashlights

Typical Application Circuit

Efficiency vs LED Current (V_IN= 5V)

20178901

20178971

201789

www.national.com

12 3 4 5 6 7...20

中文翻译

下载PDF

与LM3405_07相关器件

型号	品牌	获取价格	描述	数据表
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
LM3405A	TI	获取价格	LM3405A 1.6MHz, 1A Constant Current Buck LED Driver with Internal ensation in Tiny SOT and
LM3405A_08	NSC	获取价格	1.6MHz, 1A Constant Current Buck LED Driver with Internal Compensation in Tiny SOT23 and e
LM3405AXMK	NSC	获取价格	1.6MHz, 1A Constant Current Buck LED Driver with Internal Compensation in Tiny SOT23 Packa