SC662EVB

更新时间： 2024-09-19 09:33:19

品牌	Logo	应用领域
商升特 - SEMTECH		驱动器
页数	文件大小	规格书
30页	936K
描述
Backlight Driver for 6 LEDs with SemPulse? Interface

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中文翻译

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SC662EVB 数据手册

SC662

Backlight Driver for 6 LEDs

with SemPulse® Interface

POWER MANAGEMENT

Features

Description



Input supply voltage range — 2.9V to 5.5V

Very high eﬃciency charge pump driver system with

three modes — 1x, 1.5x and 2x

Six programmable current sinks — 0mA to 25mA

Up to three LED grouping options

Fade-in/fade-out feature for main LED bank

Selectable charge pump frequency — 250kHz/1MHz

SemPulse^®single wire interface

Backlight current accuracy — 1.5ꢀ typical

Backlight current matching — 0.5ꢀ typical

LED ﬂoat detection

Automatic sleep mode with all LEDs oﬀ

Sleep mode quiescent current — 60µA typical

Shutdown current — 0.1µA typical

Ultra-thin package — 2 x 2 x 0.6 (mm)

Lead-free and halogen-free

The SC662 is a high eﬃciency charge pump LED driver

using Semtech’s proprietary charge pump technology.

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

battery applications.



The charge pump provides backlight current utilizing six

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 SC662 uses the proprietary SemPulse single wire

interface to control all functions of the device, including

backlight currents. The single wire interface minimizes

microcontroller and interface pin counts. The six LEDs can

be grouped in up to three separate banks that can be

independently controlled.

WEEE and RoHS compliant

Applications

The charge pump switches at 1MHz or 250kHz, and the

frequency is selectable using the SemPulse interface. Both

1MHz and 250kHz frequencies are supported by 0402 size

(1005 metric) ceramic capacitors.



Cellular phones, smart phones, and PDAs

LCD modules

Portable media players

Digital cameras

Personal navigation devices

Display/keypad backlighting and LED indicators

The SC662 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

interface.

Typical Application Circuit

OUT

C_IN

C_OUT

1.0µF

SC662

SPIF

GND

BL1

BL2

BL3

BL4

BL5

BL6

From

Microprocessor

C1+ C1- C2+ C2-

C₁

C₂

1.0µF

November 30, 2010

12 3 4 5 6 7...30

中文翻译

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与SC662EVB相关器件

型号	品牌	获取价格	描述	数据表
SC662ULTRT	SEMTECH	获取价格	Backlight Driver for 6 LEDs with SemPulse? Interface
SC667	SEMTECH	获取价格	7 LED Light Management Unit Automatic Dropout Prevention, Ambient Light Sense Input, PWM D
SC667201MMG1	FREESCALE	获取价格	Qorivva MPC5642A Microcontroller
SC667201MMG2	FREESCALE	获取价格	Qorivva MPC5642A Microcontroller
SC667201MMG3	FREESCALE	获取价格	Qorivva MPC5642A Microcontroller
SC667EVB	SEMTECH	获取价格	7 LED Light Management Unit Automatic Dropout Prevention, Ambient Light Sense Input, PWM D
SC667ULTRT	SEMTECH	获取价格	7 LED Light Management Unit Automatic Dropout Prevention, Ambient Light Sense Input, PWM D
SC668	SEMTECH	获取价格	8 LED Light Management Unit Automatic Dropout Prevention , Ambient Light Sense Input, PWM
SC668EVB	SEMTECH	获取价格	8 LED Light Management Unit Automatic Dropout Prevention , Ambient Light Sense Input, PWM
SC668ULTRT	SEMTECH	获取价格	8 LED Light Management Unit Automatic Dropout Prevention , Ambient Light Sense Input, PWM

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