SC623A

更新时间： 2024-11-07 03:33:23

品牌	Logo	应用领域
商升特 - SEMTECH		闪光灯泵
页数	文件大小	规格书
21页	280K
描述
LED Light Management Unit Charge Pump, 4 LEDs, 400mA Flash LED, and I2C Interface

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SC623A 数据手册

SC623A

LED Light Management Unit

Charge Pump, 4 LEDs, 400mA Flash LED,

and I²C Interface

POWER MANAGEMENT

Features

Description

Input supply voltage range — 3.0V to 5.5V

Charge pump modes — 1x, 1.5x and 2x

Four programmable current sinks with 32 steps from

0.5mA to 25mA

The SC623A is a high eﬃciency charge pump LED driver

using Semtech’s proprietary mAhXLife^TMtechnology.

Performance is optimized for use in single-cell Li-ion

battery applications.

Flash LED — 400mA max in ﬂash mode, 250mA max

continuous for spotlight

The charge pump provides backlight current in

conjunction with four matched current sinks. It also can

supply continuous or bursted current to a ﬂash LED using

thededicatedﬂash driver currentsink.Theload and supply

conditions determine whether the charge pump operates

in 1x, 1.5x, or 2x mode. An optional fading feature that

gradually adjusts the backlight current is provided to

simplify control software. A ﬂash-timeout feature disables

the ﬂash if active for longer than 1 second.

Charge pump frequency — 250kHz

I²C compatible interface — up to 400kHz

Backlight current accuracy 1.5ꢀ typical

Backlight current matching 0.5ꢀ typical

Programmable fade-in/fade-out for main backlight

External ﬂash control pin to sync with camera

Optional 1s ﬂash time out

Automatic sleep mode (LEDs oﬀ) — I_Q= 100μA

Low shutdown current — 0.1μA (typical)

Ultra-thin package — 3mm x 3mm x 0.6mm

Fully WEEE and RoHS compliant

The SC623A uses an I²C compatible serial interface. The

interface controls all functions of the device, including

backlight and ﬂash currents. The ﬂash/spotlight output is

triggered via either the I²C interface or a dedicated pin.

Applications

Cellular phone backlighting and ﬂash

PDA backlighting and ﬂash

Camera I/O and core power

In sleep mode, the device reduces quiescent current to

100μA while continuing to monitor the serial interface.

Total current reduces to 0.1μA in shutdown.

Typical Application Circuit

MAIN BACKLIGHT

FLASH

VIN

VOUT

V_BAT

C_OUT

4.7μF

I²C Data

I²C Clock

SC623A

SDA

SCL

FLEN

C_IN

2.2μF

Flash Control

Enable Control

AGND

PGND

C1+ C1- C2+ C2-

2.2μF

US Patents: 6,504,422; 6,794,926

June 27, 2007

12 3 4 5 6 7...21

中文翻译

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与SC623A相关器件

型号	品牌	获取价格	描述	数据表
SC623AEVB	SEMTECH	获取价格	LED Light Management Unit Charge Pump, 4 LEDs, 400mA Flash LED, and I2C Interface
SC623AULTRT	SEMTECH	获取价格	LED Light Management Unit Charge Pump, 4 LEDs, 400mA Flash LED, and I2C Interface
SC623EVB	SEMTECH	获取价格	LED Light Management Unit Charge Pump, 4 LEDs, 400mA Flash LED, and SemWireTM Interface
SC623ULTRT	SEMTECH	获取价格	LED Light Management Unit Charge Pump, 4 LEDs, 400mA Flash LED, and SemWireTM Interface
SC624	SEMTECH	获取价格	LED Light Management Unit Charge Pump, 4 LEDs, Dual LDOs, and SemWireTM Interface
SC624_09	SEMTECH	获取价格	LED Light Management Unit Charge Pump, 4 LEDs, Dual LDOs,and SemWireTM Interface
SC624A	SEMTECH	获取价格	LED Light Management Unit Charge Pump, 4 LEDs, Dual LDOs, and I2C Interface
SC624A_09	SEMTECH	获取价格	LED Light Management Unit Charge Pump, 4 LEDs, Dual LDOs,and I2C Interface
SC624AEVB	SEMTECH	获取价格	LED Light Management Unit Charge Pump, 4 LEDs, Dual LDOs, and I2C Interface
SC624AULTRT	SEMTECH	获取价格	LED Light Management Unit Charge Pump, 4 LEDs, Dual LDOs, and I2C Interface

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