SC622ULTRT

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
21页	301K
描述
LED Light Management Unit Charge Pump, 400mA Flash LED, Dual LDOs, and SemWireTM Interface

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SC622ULTRT 数据手册

SC622

LED Light Management Unit

Charge Pump, 400mA Flash LED, Dual

LDOs, and SemWire^TMInterface

POWER MANAGEMENT

Features

Description

The SC622 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

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

continuous for spotlight

Two user-conﬁgurable 100mA low-noise LDO

regulators

Charge pump frequency — 250kHz

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

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 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 SC622 also provides two low-dropout, low-

noise linear regulators for powering a camera module or

other peripheral circuits.

The SC622 uses the proprietary SemWire^TMsingle wire

interface. The interface controls all functions of the device,

including ﬂash current and two LDO voltage outputs. 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 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

SemWire

Interface

Flash

C_OUT

4.7μF

SWIF

FLEN

C_IN

2.2μF

SC622

Control

BYP

C_BYP

22nF

GREF

AGND

PGND

V_LDO1= 2.5V to 3.3V

V_LDO2= 1.5V to 1.8V

LDO1

LDO2

C1+ C1- C2+ C2-

C_LDO1

1.0μF

C_LDO2

1.0μF

2.2μF

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

July 19, 2007

12 3 4 5 6 7...21

中文翻译

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与SC622ULTRT相关器件

型号	品牌	获取价格	描述	数据表
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
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

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