Datasheet > LM3405A_08

LM3405A_08

更新时间： 2024-02-17 19:05:33

品牌	Logo	应用领域
美国国家半导体 - NSC		驱动器
页数	文件大小	规格书
20页	510K
描述
1.6MHz, 1A Constant Current Buck LED Driver with Internal Compensation in Tiny SOT23 and eMSOP Package

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LM3405A_08 数据手册

October 23, 2008

LM3405A

1.6MHz, 1A Constant Current Buck LED Driver with Internal

Compensation in Tiny SOT23 and eMSOP Package

General Description

Features

The LM3405A is a 1A constant current buck LED driver de-

signed 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 frequency is internally set to 1.6MHz, allowing

small surface mount inductors and capacitors to be used. The

LM3405A utilizes current-mode control and internal compen-

sation offering ease of use and predictable, high performance

regulation over a wide range of operating conditions. With a

maximum input voltage of 22V, it can drive up to 5 High-

Brightness LEDs in series at 1A forward current, with the

single LED forward voltage of approximately 3.7V. 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 22V

■

Drives up to 5 High-Brightness LEDs in series at 1A

Thin SOT23-6 package & eMSOP8 with exposed DAP

1.6MHz switching frequency

EN/DIM input for enabling and PWM dimming of LEDs

■

300mΩ NMOS switch

■

40nA shutdown current at V_IN= 5V

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

LED Lightbulbs

■

Typical Application Circuit

Efficiency vs LED Current (V_IN= 12V)

30015201

30015273

300152

www.national.com

12 3 4 5 6 7...20

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与LM3405A_08相关器件

型号	品牌	获取价格	描述	数据表
LM3405AXMK	NSC	获取价格	1.6MHz, 1A Constant Current Buck LED Driver with Internal Compensation in Tiny SOT23 Packa
LM3405AXMK	TI	获取价格	LM3405A 1.6MHz, 1A Constant Current Buck LED Driver with Internal ensation in Tiny SOT and
LM3405AXMK/NOPB	NSC	获取价格	IC 2.8 A SWITCHING REGULATOR, 1900 kHz SWITCHING FREQ-MAX, PDSO6, LEAD FREE, TSOT-23, 6 PI
LM3405AXMK/NOPB	TI	获取价格	1.6MHz, 1A Constant Current Buck LED Driver with Internal Compensation in Tiny SOT and MSO
LM3405AXMKE	TI	获取价格	LM3405A 1.6MHz, 1A Constant Current Buck LED Driver with Internal ensation in Tiny SOT and
LM3405AXMKE	NSC	获取价格	1.6MHz, 1A Constant Current Buck LED Driver with Internal Compensation in Tiny SOT23 Packa
LM3405AXMKE/NOPB	NSC	获取价格	IC 2.8 A SWITCHING REGULATOR, 1900 kHz SWITCHING FREQ-MAX, PDSO6, LEAD FREE, TSOT-23, 6 PI
LM3405AXMKE/NOPB	TI	获取价格	1.6MHz, 1A Constant Current Buck LED Driver with Internal Compensation in Tiny SOT and MSO
LM3405AXMKX	TI	获取价格	LM3405A 1.6MHz, 1A Constant Current Buck LED Driver with Internal ensation in Tiny SOT and
LM3405AXMKX	NSC	获取价格	1.6MHz, 1A Constant Current Buck LED Driver with Internal Compensation in Tiny SOT23 Packa

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