SC624EVB

更新时间： 2024-11-21 03:33:23

品牌	Logo	应用领域
商升特 - SEMTECH		泵
页数	文件大小	规格书
22页	289K
描述
LED Light Management Unit Charge Pump, 4 LEDs, Dual LDOs, and SemWireTM Interface

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SC624EVB 数据手册

SC624

LED Light Management Unit

Charge Pump, 4 LEDs, Dual LDOs,

and SemWire^TMInterface

POWER MANAGEMENT

Features

Description

The SC624 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

Two user-conﬁgurable 100mA low-noise LDO

regulators

Charge pump frequency — 250kHz

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 SC624 also

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

powering a camera module or other peripheral circuits.

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

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 SC624 uses the proprietary SemWire^TMsingle wire

interface. The interface controls all functions of the device,

including backlight current and two LDO voltage outputs.

Thesinglewireimplementationminimizesmicrocontroller

and interface pin counts.

Applications

Cellular phone backlighting

PDA backlighting

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

VIN

VOUT

V_BAT

SemWire

Interface

C_OUT

2.2μF

SWIF

C_IN

1μF

SC624

BL1

BL2

BL3

BL4

BYP

C_BYP

22nF

GREF

AGND

PGND

V_LDO1= 2.5V to 3.3V

_LDO2= 1.5V to 1.8V

LDO1

LDO2

C1+ C1- C2+ C2-

C_LDO1

1μF

C_LDO2

1μF

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

June 27, 2007

12 3 4 5 6 7...22

中文翻译

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与SC624EVB相关器件

型号	品牌	获取价格	描述	数据表
SC624ULTRT	SEMTECH	获取价格	LED Light Management Unit Charge Pump, 4 LEDs, Dual LDOs, and SemWireTM Interface
SC627	SEMTECH	获取价格	LED Light Management Unit Charge Pump, 4 LEDs, 700mA Flash LED, Dual LDOs, and SemWireTM I
SC627_09	SEMTECH	获取价格	LED Light Management Unit Charge Pump, 4 LEDs, 700mA Flash LED, Dual LDOs, and SemWireTM I
SC627A	SEMTECH	获取价格	LED Light Management Unit Charge Pump, 4 LEDs, 700mA Flash LED, Dual LDOs, and I2C Interfa
SC627A_09	SEMTECH	获取价格	LED Light Management Unit Charge Pump, 4 LEDs, 700mA Flash LED,Dual LDOs, and I2C Interfac
SC627AEVB	SEMTECH	获取价格	LED Light Management Unit Charge Pump, 4 LEDs, 700mA Flash LED, Dual LDOs, and I2C Interfa
SC627AULTRT	SEMTECH	获取价格	LED Light Management Unit Charge Pump, 4 LEDs, 700mA Flash LED, Dual LDOs, and I2C Interfa
SC627EVB	SEMTECH	获取价格	LED Light Management Unit Charge Pump, 4 LEDs, 700mA Flash LED, Dual LDOs, and SemWireTM I
SC627ULTRT	SEMTECH	获取价格	LED Light Management Unit Charge Pump, 4 LEDs, 700mA Flash LED, Dual LDOs, and SemWireTM I
SC628A	SEMTECH	获取价格	LED Flash Driver Charge Pump with 1000mA Flash Mode, 275mA Spotlight Mode, and I2C Interfa

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