SC653

更新时间： 2024-09-19 06:10:19

品牌	Logo	应用领域
商升特 - SEMTECH		/
页数	文件大小	规格书
22页	305K
描述
Light Management Unit with 2 LDOs and SemPulse®Interface

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SC653 数据手册

SC653

Light Management Unit with

2 LDOs and SemPulse® Interface

POWER MANAGEMENT

Features

Description

Input supply voltage range — 2.9V to 5.5V

Four programmable current sinks with 29 steps from

0mA to 25mA

Very high eﬃciency charge pump driver system with

three modes — 1x, 1.5x and 2x

The SC653 is a highly integrated light management unit

that provides two low-noise LDOs, a multi-mode high

efficiency charge pump, and four programmable LED

drivers. Performance is optimized for use in single-cell Li-

ion battery applications.

Two programmable 200mA low-noise LDO regulators

Charge pump frequency — 250kHz

SemPulse single wire interface

Backlight current accuracy — 1.5ꢀ typical

Backlight current matching — 0.5ꢀ typical

Fade-in/fade-out feature for main backlight

Automatic sleep mode (LEDs oﬀ) — I_Q= 100μA

Shutdown current — 0.1μA (typical)

Ultra-thin package — 2.3 x 2.3 x 0.6 (mm)

Lead-free and halogen-free

The load and supply conditions determine whether the

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

mable fading feature can be enabled to gradually adjust

the backlight current, simplifying control software. The

low-dropout, low-noise linear regulators can be used for

powering a camera module or other peripheral circuits.

The SC653 uses the proprietary SemPulse single wire

interface. This interface controls all functions of the device,

including backlight currents and LDO voltage outputs.

The single wire interface minimizes microcontroller and

interface pin counts.

WEEE and RoHS compliant

Applications

Cellular phones, smart phones, and PDAs

LCD modules

Portable media players

Digital cameras and GPS units

Display backlighting and LED indicators

The SC653 enters sleep mode when all the LED drivers are

disabled. In this mode, the quiescent current is reduced

while the device continues to monitor the SemPulse inter-

face. The two LDOs can be enabled when the device is in

sleep mode.

Typical Application Circuit

MAIN BACKLIGHT

SC653

_BAT= 2.9V to 5.5V

OUT

SemPulse

Interface

C_OUT

2.2μF

SPIF

C_IN

2.2μF

GND2

ENL1

ENL2

BL1

GND2

BL2

BL3

BL4

BYP

C_BYP

22nF

V_LDO1= 1.5V to 3.3V

LDO1

GND1

GND2

V_LDO2= 1.2V to 1.8V

LDO2

C1+ C1- C2+ C2-

C_LDO1

C_LDO2

1μF

GND1

GND2

GND1

2.2μF

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

October 21, 2009

12 3 4 5 6 7...22

中文翻译

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与SC653相关器件

型号	品牌	获取价格	描述	数据表
SC653EVB	SEMTECH	获取价格	Light Management Unit with 2 LDOs and SemPuls
SC653ULTRT	SEMTECH	获取价格	Light Management Unit with 2 LDOs and SemPuls
SC654	SEMTECH	获取价格	Light Management Unit for 6 LEDs with SemPulseTM Interface
SC654EVB	SEMTECH	获取价格	Light Management Unit for 6 LEDs with SemPulseTM Interface
SC654ULTRT	SEMTECH	获取价格	Light Management Unit for 6 LEDs with SemPulseTM Interface
SC656	SEMTECH	获取价格	Backlight Driver for 7 LEDs with Charge Pump and PWM Control
SC656EVB	SEMTECH	获取价格	Backlight Driver for 7 LEDs with Charge Pump and PWM Control
SC656ULTRT	SEMTECH	获取价格	Backlight Driver for 7 LEDs with Charge Pump and PWM Control
SC657	SEMTECH	获取价格	Backlight Driver for 5 LEDs with SemPulseTM Interface
SC6579	SILAN	获取价格	RADIO DATA SYSTEM (RDS) DEMODULATOR

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