Datasheet > LSP3312

LSP3312

更新时间： 2024-10-18 05:34:47

品牌	Logo	应用领域
台湾光宝 - LITEON		半导体
页数	文件大小	规格书
12页	497K
描述
成立於1990年, 主要以设计并生产接触式影像感测器(CiS)为主。 2000年合并分离式元件　　制造厂旭兴科技，2004年正式成立并发展类比IC产品，2005年透过合并立生半导体得以拥有一座6吋晶圆厂, 顺利为敦南”全方位电源管理解决方案”的整体目标奠下完整且坚实的基础建设。

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LSP3312 数据手册

LSP3312

1A LED Driver with Internal Switch

Features

General Description

ꢀ

Simple low parts count

The LSP3312 is

continuous mode

inductive step-down converter, designed for

driving single or multiple series connected

LEDs efficiently from a voltage source higher

than the LED voltage. The device operates

from an input supply between 6V and 40V

and provides and externally adjustable

output current of up to 1A. Depending upon

supply voltage and external components,

this can provide up to 30 watts of output

power.

The LSP3312 includes the output switch and

a high-side output current sensing circuit,

which uses and external resistor to set the

nominal average output current.

Output current can be adjusted below the set

values, bye applying an external control

signal to the VSET pin.

Internal 40V NDMOS switch

1A output current

Single pin on/off and brightness control

Using DC voltage or PWM

Soft-start

ꢀ

High efficiency (up to 97%)

Wide input voltage range ：6V to 40V

ꢀ

Output shutdown

Up to 1MHz switching frequency

Inherent open-circuit LED protection

Typical 5% output current accuracy

Package ： SOT23-5L,ESOP-8L

Applications

The VSET pin will accept either a DC

voltage or a PWM waveform.

ꢀ

Low voltage halogen replacement LEDs

The soft-start time can be increased using

an external capacitor from the VSET pin to

ground.

Applying a voltage of 0.2V or lower to the

VSET pin turns the output off and switches

the device into a low current standby state.

Automotive lighting

Low voltage industrial lighting

LED back-up lighting

Typical Application Circuit

0.3

VIN(6V-40V)

ISENSE

VIN

100uH

LSP3312

VSET

10uF

Floating

LSP3312 Rev. Preliminary 0.1

1 of 12

www.liteon-semi.com

2010/08/23

12 3 4 5 6 7...12

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