SC624AEVB datasheet(1/23 Pages) SEMTECH

부품명	SC624AEVB

상세설명	LED Light Management Unit Charge Pump, 4 LEDs, Dual LDOs,and I2C Interface

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제조업체	SEMTECH [Semtech Corporation]

홈페이지	http://www.semtech.com

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POWER MANAGEMENT

1

SC624A

LED Light Management Unit

Charge Pump, 4 LEDs, Dual LDOs,

and I2C Interface

Features

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

Two programmable 200mA low-noise LDO regulators

Charge pump frequency — 250kHz

I2C compatible interface — up to 400kHz

Backlight current accuracy ±1.5% typical

Backlight current matching ±0.5% typical

Programmable fade-in/fade-out for main backlight

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

WEEE and RoHS compliant

Applications

Cellular phone backlighting

PDA backlighting

Camera I/O and core power

Description

The SC624A is a high efficiency charge pump LED driver

using Semtech’s proprietary mAhXLifeTM technology.

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

battery applications.

The

charge

pump

provides

backlight

current

in

conjunction with four matched current sinks. 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. The SC624A also

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

powering a camera module or other peripheral circuits.

The SC624A uses an I2C compatible serial interface. The

interface controls all functions of the device, including

backlight current and two LDO voltage outputs.

In sleep mode, the device reduces quiescent current to

100

μA 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.

SC624A

VIN

SDA

BYP

AGND

PGND

VOUT

BL 1

BL 2

BL 3

BL 4

CIN

1μF

MAIN BACKLIGHT

LDO 1

LDO 2

1

C+ C1- C2+ C2-

I2C Data

VLDO1 = 2.5V to 3.3V

VLDO2 = 1.5V to 1.8V

Enable Control

I2C Clock

SCL

EN

VBAT

CBYP

22nF

C1

1μF

C2

1μF

COUT

2.2μF

CLDO2

1μF

CLDO1

1μF

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

Typical Application Circuit

October 19, 2009

유사한 부품 번호 - SC624AEVB

제조업체	부품명	데이터시트	상세설명
Semtech Corporation	SC624AEVB	295Kb / 23P	LED Light Management Unit Charge Pump, 4 LEDs, Dual LDOs, and I2C Interface

More results

유사한 설명 - SC624AEVB

제조업체	부품명	데이터시트	상세설명
Semtech Corporation	SC621	307Kb / 23P	LED Light Management Unit Charge Pump, 4 LEDs, 400mA Flash LED, Dual LDOs, and SemWireTM Interface
	SC624	288Kb / 22P	LED Light Management Unit Charge Pump, 4 LEDs, Dual LDOs, and SemWireTM Interface
	SC624A	295Kb / 23P	LED Light Management Unit Charge Pump, 4 LEDs, Dual LDOs, and I2C Interface
	SC627	362Kb / 23P	LED Light Management Unit Charge Pump, 4 LEDs, 700mA Flash LED, Dual LDOs, and SemWireTM Interface
	SC627A	380Kb / 24P	LED Light Management Unit Charge Pump, 4 LEDs, 700mA Flash LED, Dual LDOs, and I2C Interface
	SC622A	313Kb / 23P	LED Light Management Unit Charge Pump, 400mA Flash LED, Dual LDOs, and I2C Interface
	SC621A	320Kb / 24P	LED Light Management Unit Charge Pump, 4 LEDs, 400mA Flash LED, Dual LDOs, and I2C Interface
	SC622A	308Kb / 23P	LED Light Management Unit Charge Pump, 400mA Flash LED,Dual LDOs,and I2C Interface
	SC624	295Kb / 22P	LED Light Management Unit Charge Pump, 4 LEDs, Dual LDOs,and SemWireTM Interface
	SC627A	321Kb / 24P	LED Light Management Unit Charge Pump, 4 LEDs, 700mA Flash LED,Dual LDOs, and I2C Interface

More results

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유사한 부품 번호 - SC624AEVB

유사한 설명 - SC624AEVB

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