SC614DB

更新时间： 2024-09-17 03:33:23

品牌	Logo	应用领域
商升特 - SEMTECH		驱动器
页数	文件大小	规格书
25页	382K
描述
Low Noise Backlight and Flash Driver With Serial Interface

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SC614DB 数据手册

SC614

Low Noise Backlight and Flash

Driver With Serial Interface

POWER MANAGEMENT

Description

Features

The SC614 is a high efficiency charge pump LED driver Four independent current sinks for main backlight,

using Semtech’s proprietary mAhXLife^TMtechnology.

adjustable from 0.4mA to 32mA each

Performance is optimized for use in Li-ion battery Dedicated MDIM pin for PWM dimming of main

applications.

backlight

Three independent current sinks for sub-backlight

or flash, adjustable from 0.4mA to 102mA each

Each of 7 LED currents can be programmed via the

I²C serial control bus. M1 through M4 are for LED Configurable sub-backlight or flash sinks

backlighting of LCD main displays. S1/FL3 through Dedicated SDIM pin for PWM dimming of sub-

S3/FL1 can be used for backlighting sub displays and/

backlight

or for driving flash LEDs. These three current sinks are Dedicated FL pin for flash control

configurable over the I²C interface for any combination Current accuracy to within ±1.5% down to 4.8mA

of pins for sub or flash use.

Current matching to within ±0.5% down to 4.8mA

Very high efficiency over 90% of battery life

The charge pump automatically selects an operating Shutdown current 0.1μA (typ)

mode based on the number of active loads, input Three charge pump operating modes: 1x, 1.5x,

voltage, and load currents required. Any combination of

and 2x

LED drivers can be enabled at one time, allowing the I²C serial interface

SC614 to power any combination of backlight and flash Soft-start/in-rush current limiting

required by the application.

1.33MHz and 250kHz programmable fixed

frequency options

Two dedicated pins, MDIM and SDIM, are provided to Short-circuit/thermal protection

allow PWM dimming of the main and sub-backlights and Output open circuit protection

one dedicated pin, FL, allows direct control of the flash. MLPQ-24 package (4mm x 4mm), fully WEEE and

All three pins can be utilized without having to use the

RoHS compliant

I²C interface once the registers are set up.

Applications

Cellular phone backlighting and flash

LCD modules

PDA backlighting and flash

RGB LED Driver

The enable pin can be used to put the device in

low-current shutdown mode drawing 0.1μA (typ), or a reg-

ister can be written that sets the device in a sleep mode

that reduces the current to 50μA (typ).

Typical Application Circuit

MAIN BACKLIGHT

FLASH

VBAT

VLOGIC

328mA Max Continuous

434mA Max (500ms)

VIN

VOUT

VIN

Pull-up

2u2

LED

32mA Max

306mA Max.

SDIM

MDIM

SDIM

MDIM

SC614

SDA

SCL

SDA

SCL

S1/FL3

S2/FL2

S3/FL1

ASEL

GND

Note: R1 and R2

pull-up resistors are a

requirement of the I2C

specification

C3 1u

C4 1u

April 28, 2006

United States Patent No. 6,504,422

www.semtech.com

12 3 4 5 6 7...25

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与SC614DB相关器件

型号	品牌	获取价格	描述	数据表
SC614EVB	SEMTECH	获取价格	Low Noise Backlight and Flash Driver With Serial Interface
SC614MLTRT	SEMTECH	获取价格	Low Noise Backlight and Flash Driver With Serial Interface
SC614-R	ETC	获取价格	Speech And Music Processor
SC614-RL1	ETC	获取价格	Speech And Music Processor
SC615	SEMTECH	获取价格	Charge Pump Flash LED Driver
SC615A	SEMTECH	获取价格	Charge Pump Flash LED Driver
SC615A_08	SEMTECH	获取价格	Charge Pump Flash LED Driver
SC615AEVB	SEMTECH	获取价格	Charge Pump Flash LED Driver
SC615AMLTRT	SEMTECH	获取价格	Charge Pump Flash LED Driver
SC615EVB	SEMTECH	获取价格	Charge Pump Flash LED Driver

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