Datasheet > MIC3263

MIC3263

更新时间： 2024-11-09 10:57:07

品牌	Logo	应用领域
麦瑞 - MICREL		驱动器
页数	文件大小	规格书
32页	974K
描述
Six-Channel WLED Driver for Backlighting Applications with Flicker-Free Dimming

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MIC3263 数据手册

MIC3263

Six-Channel WLED Driver for

Backlighting Applications with

Flicker-Free Dimming

General Description

Features

The MIC3263 is a high-efficiency Pulse Width Modulation

(PWM) boost switching regulator that is optimized for

constant-current WLED driver backlighting applications.

The MIC3263 drives six channels of up to ten WLEDs per

channel. Each channel is matched in current to within ±3%

for constant brightness across the screen and can be

programmed from 15mA to 30mA.

• 6V to 40V wide input voltage range

• Drives 6 channels of up to 10 white LEDs

• Programmable WLED current from 15mA to 30mA

• Highly reliable operation with open and short LEDs

• Accurate 16 dimming l

og levels sets the dimming ratio

from 1% to 100%

• Flicker-Free Dimming filters the jitter from the dimming

The MIC3263 provides a very flexible dimming control

scheme with better accuracy and noise immunity. The

dimming frequency can be set to any value between

100Hz and 20kHz by an external resistor. The dimming

ratio is determined by the duty cycle of a dimming ratio

control input signal and can be set to one of 16 levels with

a minimum ratio of 1%.The LED dimming current is set by

an external resistor to allow programming of LED current

between 15mA and 30mA.

control input signal and eliminates dimming flicker

• Allows external dimming control

• Accurate LED channel current matching ±3%

• Accurate initial LED current setting ±2%

• Programmable switching frequency from 400kHz to

1.8MHz

• High efficiency up to 90%

The dimming ratio of the MIC3263 is fixed to 16 log levels

to better match the sensitivity of the human eye. Each of

the dimming levels has hysteresis to avoid skipping

between levels and allow for high noise immunity.

• Low (<40μA) shutdown current over temperature

• Over temperature protection

• Programmable over-voltage protection

• −40°C to +125°C junction temperature range

• Available in 24-pin 4mm x 4mm MLF® package

The MIC3263 has a programmable PWM switching

frequency from 400 KHz to 1.8 MHz to allow small inductor

sizes. The 6V to 40V wide input voltage range of MIC3263

allows direct operation from 6V or high cell count Li-Ion

batteries commonly found in notebook computers.

Applications

• White LED driver for backlighting

• Notebooks

• LCD Panels and Monitors

• Multimedia players

• Navigation equipment

• Gaming systems

The MIC3263 is available in a low-profile 24-pin 4mm x

4mm MLF® package and has a junction temperature

range of −40°C to +125°C.

Data sheets and support documentation can be found on

Micrel’s web site at: www.micrel.com.

• Video poker

• Slot machines

_________________________________________________________________________________________________________________________

MLF is a registered trademark of Micrel, Inc.

Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel +1 (408) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com

M9999-012110

January 2010

12 3 4 5 6 7...32

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与MIC3263相关器件

型号	品牌	获取价格	描述	数据表
MIC3263YML	MICREL	获取价格	Six-Channel WLED Driver for Backlighting Applications with Flicker-Free Dimming
MIC3263YML	MICROCHIP	获取价格	LED DISPLAY DRIVER, QCC24
MIC3263YMLTR	MICROCHIP	获取价格	LED DISPLAY DRIVER, QCC24, 4 X 4 MM, LEAD FREE, MLF-24
MIC3263YML-TR	MICROCHIP	获取价格	LED DISPLAY DRIVER, QCC24
MIC3287	MICREL	获取价格	1.2MHz PWM White LED Driver with OVP in Thin SOT-23 and 2mm x 2mm MFL
MIC3287	MICROCHIP	获取价格	The MIC3287 is a 1.2MHz pulse-width modulated (PWM) step-up switching regulator that is op
MIC3287_10	MICREL	获取价格	1.2MHz PWM White LED Driver with OVP in Thin SOT-23 and 2mm x 2mm MFL
MIC3287-24YD6	MICREL	获取价格	1.2MHz PWM White LED Driver with OVP in Thin SOT-23 and 2mm x 2mm MFL
MIC3287-24YML	MICREL	获取价格	1.2MHz PWM White LED Driver with OVP in Thin SOT-23 and 2mm x 2mm MFL
MIC3287-24YML-TR	MICROCHIP	获取价格	LED DISPLAY DRIVER, DSO8

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