Datasheet > MIC2289-24BMLTR

MIC2289-24BMLTR

更新时间： 2023-01-03 09:25:48

品牌	Logo	应用领域
美国微芯 - MICROCHIP		/
页数	文件大小	规格书
10页	267K
描述
LED Driver, 3-Segment, 2 X 2 MM, MLF-8

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MIC2289-24BMLTR 数据手册

MIC2289

White LED Driver Internal Schottky

Diode and OVP

General Description

Features

The MIC2289 is a PWM (pulse width modulated), boost-

switching regulator that is optimized for constant-current

white LED driver applications. The MIC2289 features an

internal Schottky diode and three levels of output

overvoltage protection providing a small size and efficient

DC/DC solution that requires only four external

components.

• 2.5V to 10V input voltage

• Output voltage up to 34V

• Internal Schottky diode

• 15V, 24V, 34V output OVP options

• 1.2 MHz PWM operation

• Over 500mA switch current

• 95mV feedback voltage

To optimize efficiency, the feedback voltage is set to only

95mV. This reduces power dissipation in the current set

resistor and allows the lowest total output voltage, hence

minimal current draw from the battery.

• <1% line and load regulation

• <1µA shutdown current

• Overtemperature protection

• UVLO

The MIC2289 implements a constant frequency 1.2MHz

PWM control scheme. The high frequency, PWM operation

saves board space by reducing external component sizes.

The added beneﬁt of the constant frequency PWM scheme

in caparison to variable frequency is much lower noise and

input ripple injected to the input power source.

• 2mm × 2mm 8-pin MLF^®package

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

Applications

The MIC2289 clamps the output voltage in case of open

LED conditions, protecting itself and the output capacitor.

The MIC2289 is available with three output OVP options of

15V, 24V, and 34V. The different OVP options allows the

use of the smallest possible output capacitor with the

appropriate voltage rating for a given application.

• White LED driver for backlighting:

– Cell phones

– PDAs

– GPS systems

– Digital cameras

– MP3 players

– IP phones

The MIC2289 is available in low profile 6-pin Thin SOT-23

and 8-pin 2mm × 2mm MLF^®package options. The

MIC2289 has a junction temperature range of –40°C to

+125°C.

• LED ﬂashlights

• Constant current power supplies

Data sheets and support documentation can be found on

Micrel’s web site at: www.micrel.com.

Typical Application

10µH

3-Series LED Efficiency

MIC2289-15BML

VIN

1-Cell

Li Ion

1µF

0.22µF/16V

OUT

95mV

GND

V_IN=3.6V

15 20 25

I_OUT(mA)

3-Series White LED Driver

MLF and MicroLeadFrame are registered 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

M9999-071007

July 2007

12 3 4 5 6 7...10

中文翻译

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与MIC2289-24BMLTR相关器件

型号	品牌	获取价格	描述	数据表
MIC2289-24YD6	MICREL	获取价格	White LED Driver Internal Schottky Diode and OVP
MIC2289-24YD6-TR	MICROCHIP	获取价格	LED DISPLAY DRIVER
MIC2289-24YD6-TX	MICROCHIP	获取价格	LED Driver
MIC2289-24YML	MICREL	获取价格	2mm 】 2mm White LED Driver with Internal Scho
MIC2289-24YML	MICROCHIP	获取价格	LED DISPLAY DRIVER, DSO8
MIC2289-24YMLTR	MICROCHIP	获取价格	LED DISPLAY DRIVER, DSO8, 2 X 2 MM, LEAD FREE, MLF-8
MIC2289-24YML-TR	MICROCHIP	获取价格	LED DISPLAY DRIVER, DSO8
MIC2289-34BML	MICREL	获取价格	2mm 】 2mm White LED Driver with Internal Scho
MIC2289-34BML	MICROCHIP	获取价格	LED Driver, 3-Segment, 2 X 2 MM, MLF-8
MIC2289-34BMLTR	MICROCHIP	获取价格	LED Driver, 3-Segment, 2 X 2 MM, MLF-8

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