MIC3287YD5

更新时间： 2024-11-20 03:10:07

品牌	Logo	应用领域
麦瑞 - MICREL		驱动器
页数	文件大小	规格书
9页	336K
描述
1.2MHz PWM White LED Driver with OVP in Thin SOT-23 and 2mm x 2mm MFL

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MIC3287YD5 数据手册

MIC3287

Micrel, Inc.

MIC3287

1.2MHz PWM White LED Driver with OVP in

Thin SOT-23 and 2mm x 2mm MFL™

General Description

Features

The MIC3287 is a 1.2MHz pulse width modulated (PWM)

step-up switching regulator that is optimized for constant

current white LED driving applications. With a maximum

output voltage of 24V and a switch current of over 350mA,

the MIC3287 drives a string of up to 4 white LEDs in series,

ensuring uniform brightness and eliminating several ballast

resistors.

• 2.8V to 5.5V Input Voltage

• 350mA Switch Current

• 1.2 MHz PWM Operation

• 250mV Feedback Voltage

• 24V Output Over-Voltage Protection (OVP) Option

• <1% Line and Load Regulation

• <1µA Shutdown Current

• Over-Temperature Protection

TheMIC3287implementsaconstantfrequency1.2MHzPWM

current-mode control scheme. The high frequency PWM op-

eration saves board space by reducing external component

sizes. The added beneﬁt of the constant frequency PWM

control scheme as opposed to variable frequency control

schemes is much lower noise and input ripple injected back

to the battery source. To optimize efﬁciency, the feedback

voltage is set to only 250mV. The MIC3287 is also available

with a maximum 24V over-voltage protection.

• Under-Voltage Lock Out (UVLO)

• Low Proﬁle Thin SOT-23-5 Package Option

• Low Proﬁle Thin SOT-23-6 Package Option

• 8-pin 2mm x 2mm MLF™ Package Option

• –40°C to +125°C Junction Temperature Range

Applications

• White LED Driver for Backlighting:

- Cell phones

The MIC3287 is available in low proﬁle Thin SOT-23 5-pin

and Thin SOT-23 6-pin packages. The MIC3287 has a junc-

tion temperature range of –40°C to +125°C.

- PDAs

- GPS systems

All support documentation can be found on Micrel’s web site

at: www.micrel.com.

- Digital cameras

- MP3 players

- IP phones

• LED Flashlights

• Constant Current Power Supplies

Typical Application

10µH

MIC3287-24YD6

MIC3287YD5

VIN

1-Cell

Li Ion

1-Cell

Li Ion

1µF

OVP

0.22µF

250mV

GND

4-Series White LED Driver

3-Series White LED Driver in Thin SOT-23-5

with Output OVP in Thin SOT-23-6

MLF and MicroLeadFrame are trademarks of Amkor Technology, 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

M9999-010306

January 2006

12 3 4 5 6 7...9

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与MIC3287YD5相关器件

型号	品牌	获取价格	描述	数据表
MIC3287YD5TR	MICREL	获取价格	LED DISPLAY DRIVER, PDSO5, LEAD FREE, MO193, SOT23, 5 PIN
MIC3287YD5-TR	MICROCHIP	获取价格	LED DISPLAY DRIVER, PDSO5
MIC3289	MICREL	获取价格	1.2MHz PWM White LED Driver with Internal Schottky Diode and True 1-Wire Digital Control
MIC3289	MICROCHIP	获取价格	The MIC3289 is a PWM boost-switching regulator that is optimized for constant-current whit
MIC3289_0706	MICREL	获取价格	1.2MHz PWM White LED Driver with Internal Schottky Diode and True 1-Wire Digital Control
MIC3289-16YD6	MICREL	获取价格	1.2MHz PWM White LED Driver with Internal Schottky Diode and True 1-Wire Digital Control
MIC3289-16YML	MICREL	获取价格	1.2MHz PWM White LED Driver with Internal Schottky Diode and True 1-Wire Digital Control
MIC3289-16YMLTR	MICROCHIP	获取价格	LED DISPLAY DRIVER, DSO8, 2 X 2 MM, MLF-8
MIC3289-16YML-TR	MICROCHIP	获取价格	LED DISPLAY DRIVER, DSO8
MIC328924YD6	MICROCHIP	获取价格	LED DISPLAY DRIVER, PDSO6

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