SC623

更新时间： 2024-09-17 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	275K
描述
LED Light Management Unit Charge Pump, 4 LEDs, 400mA Flash LED, and SemWireTM Interface

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SC623 数据手册

SC623

LED Light Management Unit

Charge Pump, 4 LEDs, 400mA Flash LED,

and SemWire^TMInterface

POWER MANAGEMENT

Features

Description

The SC623 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.

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

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

continuous for spotlight

Charge pump frequency — 250kHz

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

the dedicated ﬂash driver current sink. The load 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.

SemWire^TMsingle wire interface — up to 75kbit/s

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 SC623 uses the proprietary SemWire^TMsingle wire

interface. The interface controls all functions of the device,

including backlight and ﬂash currents. The single wire

implementation minimizes microcontroller and interface

pin counts. The ﬂash/spotlight output is triggered via

either the SemWire interface or a dedicated pin.

Applications

Cellular phone backlighting and ﬂash

PDA backlighting and ﬂash

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

SemWire

Interface

Flash

C_OUT

4.7μF

SWIF

FLEN

C_IN

2.2μF

SC623

Control

BL1

BL2

BL3

BL4

GREF

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SC623相关器件

型号	品牌	获取价格	描述	数据表
SC623A	SEMTECH	获取价格	LED Light Management Unit Charge Pump, 4 LEDs, 400mA Flash LED, and I2C Interface
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

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