Datasheet > SC621A_09

SC621A_09

更新时间： 2025-07-30 06:10:15

品牌	Logo	应用领域
商升特 - SEMTECH		泵
页数	文件大小	规格书
24页	315K
描述
LED Light Management Unit Charge Pump, 4 LEDs, 400mA Flash LED, Dual LDOs, and I2C Interface

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SC621A_09 数据手册

SC621A

LED Light Management Unit

Charge Pump, 4 LEDs, 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

Four programmable current sinks with 32 steps from

0.5mA to 25mA

The SC621A 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

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.The SC621A also

provides two low-dropout, low-noise linear regulators for

powering a camera module or other peripheral circuits.

Two programmable 200mA low-noise LDO regulators

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

Lead-free and halogen-free

The SC621A uses an I²C compatible serial interface. The

interface controls all functions of the device, including

backlight and ﬂash currents as well as two LDO voltage

outputs. The ﬂash/spotlight output is triggered via either

the I²C interface or a dedicated pin.

WEEE and RoHS compliant

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.

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

mode. 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

SC621A

SDA

SCL

FLEN

C_IN

2.2μF

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

October 19, 2009

12 3 4 5 6 7...24

中文翻译

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与SC621A_09相关器件

型号	品牌	获取价格	描述	数据表
SC621EVB	SEMTECH	获取价格	LED Light Management Unit Charge Pump, 4 LEDs, 400mA Flash LED, Dual LDOs, and SemWireTM I
SC621ULTRT	SEMTECH	获取价格	LED Light Management Unit Charge Pump, 4 LEDs, 400mA Flash LED, Dual LDOs, and SemWireTM I
SC621_09	SEMTECH	获取价格	LED Light Management Unit Charge Pump,4 LEDs, 400mA Flash LED Dual LDOs,and SemWire Interf
SC622	SEMTECH	获取价格	LED Light Management Unit Charge Pump, 400mA Flash LED, Dual LDOs, and SemWireTM Interface
SC622A	SEMTECH	获取价格	LED Light Management Unit Charge Pump, 400mA Flash LED, Dual LDOs, and I2C Interface
SC622AEVB	SEMTECH	获取价格	LED Light Management Unit Charge Pump, 400mA Flash LED, Dual LDOs, and I2C Interface
SC622AULTRT	SEMTECH	获取价格	LED Light Management Unit Charge Pump, 400mA Flash LED, Dual LDOs, and I2C Interface
SC622A_09	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

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