SC622AEVB

更新时间： 2024-09-17 03:33:23

品牌	Logo	应用领域
商升特 - SEMTECH		泵
页数	文件大小	规格书
23页	314K
描述
LED Light Management Unit Charge Pump, 400mA Flash LED, Dual LDOs, and I2C Interface

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SC622AEVB 数据手册

SC622A

LED Light Management Unit

Charge Pump, 400mA Flash LED, Dual

LDOs, and I²C Interface

POWER MANAGEMENT

Features

Description

Input supply voltage range — 3.0V to 5.5V

Charge pump modes — 1x, 1.5x and 2x

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

continuous for spotlight

The SC622A 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.

Two user-conﬁgurable 100mA low-noise LDO

regulators

The charge pump provides continuous or bursted current

to a ﬂash LED using a dedicated ﬂash driver current sink.

The load and supply conditions determine whether the

charge pump operates in 1x, 1.5x, or 2x mode. A ﬂash-

timeout feature disables the ﬂash if active for longer than

1 second. The SC622A also provides two low-dropout,

low-noise linear regulators for powering a camera module

or other peripheral circuits.

Charge pump frequency — 250kHz

I²C compatible interface — up to 400kHz

External ﬂash control pin to sync with camera

Optional 1s ﬂash time out

Automatic sleep mode (ﬂash 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 SC622A uses an I²C compatible serial interface. The

interface controls all functions of the device, including

ﬂash current and two LDO voltage outputs. The ﬂash/

spotlight output is triggered via either the I²C interface or

a dedicated pin.

Applications

Cellular phone ﬂash

PDA ﬂash

Camera I/O and core power

In sleep mode, the device reduces quiescent current to

100μA while continuing to monitor the serial interface.

The two LDOs can be enabled when the device is in sleep

mode. Total current reduces to 0.1μA in shutdown.

Typical Application Circuit

FLASH

VIN

VOUT

V_BAT

C_OUT

4.7μF

I²C Data

SC622A

SDA

SCL

FLEN

C_IN

2.2μF

I²C Clock

Flash Control

Enable Control

BYP

C_BYP

V_LDO1= 2.5V to 3.3V

_LDO2= 1.5V to 1.8V

LDO

AGND

PGND

22nF

C1+ C1- C2+ C2-

C_LDO1

1μF

C_LDO2

1μF

2.2μF

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

July 19, 2007

12 3 4 5 6 7...23

中文翻译

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与SC622AEVB相关器件

型号	品牌	获取价格	描述	数据表
SC622AULTRT	SEMTECH	获取价格	LED Light Management Unit Charge Pump, 400mA Flash LED, Dual LDOs, and I2C Interface
SC622EVB	SEMTECH	获取价格	LED Light Management Unit Charge Pump, 400mA Flash LED, Dual LDOs, and SemWireTM Interface
SC622ULTRT	SEMTECH	获取价格	LED Light Management Unit Charge Pump, 400mA Flash LED, Dual LDOs, and SemWireTM Interface
SC623	SEMTECH	获取价格	LED Light Management Unit Charge Pump, 4 LEDs, 400mA Flash LED, and SemWireTM Interface
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

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