Datasheet > SC617EVB

SC617EVB

更新时间： 2024-11-07 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
13页	209K
描述
Charge Pump Flash LED Driver with Safety Timer

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SC617EVB 数据手册

SC617

Charge Pump Flash LED

Driver with Safety Timer

POWER MANAGEMENT

Features

Description

Flash and spotlight — two selectable modes

Flash mode — up to 700mA output

Flash mode — 500mA max output (over rated voltage,

temperature, and load conditions)

Flash mode safety timer shut-oﬀ — 1 second

Spotlight mode set to 30% of ﬂash current

Spotlight mode — up to 210mA output

Spotlight mode —1x mode (under most conditions)

for best efficiency

Input range — 3.0V to 5.25V

External ﬂash control pin for synchronization to a cam-

era module or graphics controller

Short-circuit, over-voltage, and over-temperature pro-

tection

The SC617 is a high-current charge pump designed spe-

cifically for use with white LEDs used in camera flash

applications. Only two small bucket capacitors are required

to develop the output drive, providing a low EMI solution

compared to inductive boost regulators.

The SC617 has two modes of operation: ﬂash mode and

spotlight mode. In ﬂash mode, the SC617 is capable of

delivering 500mA of regulated current for a duration of

500ms or up to 700mA for a reduced duration. A safety

timer is also included to ensure the LED cannot be left on

indeﬁnitely and overheat. In spotlight mode the SC617

outputs 30% of the ﬂash mode current and can remain

enabled continuously.

Soft-start functionality

Separate ﬂash and spotlight control inputs for maxi-

mum versatility

An external resistor is connected in series with the LED to

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

up to 175mW, reducing the power dissipation require-

ment of the SC617. The ﬂash input overrides the control

input to make sure the ﬂash function is activated.

Ultra-thin package MLPD-UT-10 — 3 x 3 x 0.6 (mm)

Applications

Mobile camera phones

Digital cameras

PDAs with built-in cameras

The SC617 ultra-thin package provides both a low proﬁle

and high thermal eﬃciency.

Typical Application Circuit

SC617

VIN

C1+

C1-

C2+

C2-

VOUT

V_BAT

10μF

1μF

GND

White LED

1μF

ISET

CTRL

1μF

R_SET

FLASH

CTRL

December 10, 2007

12 3 4 5 6 7...13

中文翻译

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