Datasheet > LM3590

LM3590

更新时间： 2024-09-29 22:51:55

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
9页	204K
描述
LM3590Series White LED Driver

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LM3590 数据手册

November 2003

LM3590

Series White LED Driver

General Description

The LM3590 is a White LED constant current driver capable

of supplying up to 3 White LEDs connected in series with

20mA. This device operates over a wide 6V-12.6V input

voltage range. The output can accomodate LEDs with a

combined forward voltage of up to 11.5V, from a 12V input

supply. The LED drive current is programmed by using an

external resistor on the I_SETpin.

Features

n Drives up to 3 stacked white LEDs

n 6.0V-12.6V input voltage range

n Up to 20mA LED output current

n Excellent LED current matching guaranteed by series

configuration

n Single connection to the White LEDs in the display

module

LED brightness can be linearly varied up to the programmed

LED current by applying a Pulse Width Modulated (PWM)

signal to the EN pin of the device. The LED output current of

the LM3590 is tightly controlled over temperature and volt-

age. LED Current matching is guaranteed due to the series

configuration of the LEDs. The series topology also simpli-

fies the connection between the White LEDs in the display

n Tightly controlled programmable current source

n Low shutdown current (0.1µA typ.)

n PWM brightness control

n Very small solution size

n SOT23-5 package: 3mm x 3mm x 1.0mm (LxWxH)

module and the LM3590 since only one connection is re- Applications

quired.

n White LED Display Backlights

n Keypad Backlights

n General purpose constant current driver for high

forward-voltage LEDs

The LM3590 typically draws only 50µA when operating in the

no-load condition and draws less than 0.1µA when the de-

vice is shut down.

The LM3590 is available in a small 5-pin SOT23 package.

Typical Application Circuit

20081301

20081305

DS200813

www.national.com

12 3 4 5 6 7...9

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