SC605

更新时间： 2024-11-21 03:33:23

品牌	Logo	应用领域
商升特 - SEMTECH		驱动器闪光灯泵
页数	文件大小	规格书
12页	362K
描述
Charge Pump Flash LED Driver

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SC605 数据手册

SC605

Charge Pump

Flash LED Driver

ꢀ

POWER MANAGEMENT

Description

Features

The SC605 is a high-current charge pump designed spe-

ciﬁcally for use with white LEDs used in camera ﬂash ap-

plications. Only two small bucket capacitors are required

to develop the output drive, providing a low EMI solution

compared to inductive boost regulators.

ꢀTwo selectable modes - Flash and Spotlight

ꢀUp to 700mA output - Flash mode

ꢀUp to 280mA output - Spotlight mode

ꢀ500mA output over speciﬁed temperature and volt-

age ranges - Flash mode

ꢀSpotlight mode selectable to 20%, 30%

and 40% of Flash current

ꢀ3.0V to 5.25V input range

ꢀFlash control pin for synchronization to

a camera module or graphics controller

ꢀShort circuit, over-voltage and

The SC605 has two modes of operation: Flash mode and

Spotlight mode. In Flash mode, the SC605 is capable of

delivering 500mA of regulated current for a duration of

500ms or up to 700mA for a reduced duration. In Spotlight

mode the SC605 can output 20%, 30%, or 40% of the Flash

mode current and remain enabled continuously.

over-temperature protection

ꢀSoft-start functionality

An external resistor is connected in series with the LED to

set the current. In Flash mode, this resistor can dissipate

up to 0.ꢀ75mW, reducing the power dissipation require-

ment of the SC605. The Flash input (FLASH) overrides

the control inputs (CTRL0 and CTRL1) to ensure the Flash

function has the highest priority.

ꢀThree control inputs for maximum versatility

ꢀShutdown current < 2μA

ꢀMicro-lead package MLPD-12, 3mm x 3mm

Applications

ꢀMobile Camera Phones

ꢀDigital Cameras

ꢀPDAs with Built-in Cameras

The thermally efﬁcient MLPD-12 package and ceramic

bypass and bucket capacitors help make the SC605 a

high output current driver that requires a minimal amount

of PCB area.

Typical Application Circuit

SC605

VIN

VOUT

white LED

VBAT

ꢀµF

ꢀ0µF

GND

ISET

C1+

ꢀµF

FLASH

CTRL0

CTRL1

C1-

FLASH

C2+

CTRL0

CTRLꢀ

0.5W

ꢀµF

C2-

December ꢀ, 2005

www.semtech.com

ꢀ

12 3 4 5 6 7...12

中文翻译

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