MIC2289-15YMLTR

更新时间： 2024-11-24 13:11:31

品牌	Logo	应用领域
麦瑞 - MICREL		驱动器肖特基二极管
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9页	90K
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MIC2289-15YMLTR 数据手册

MIC2289

Micrel

MIC2289

2mm × 2mm White LED Driver

with 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

internalSchottkydiodeandthreelevelsofoutputovervoltage

protectionprovidingasmallsizeandefficientDC/DCsolution

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

• <1% line and load regulation

• <1mA shutdown current

• Overtemperature protection

• UVLO

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.

The MIC2289 implements a constant frequency 1.2MHz

PWM control scheme. The high frequency, PWM operation

saves board space by reducing external component sizes.

TheaddedbenefitoftheconstantfrequencyPWMschemein

caparison to varible 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

• White LED driver for backlighting

Cell phones

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.

PDAs

GPS systems

Digital cameras

MP3 players

IP phones

• LED flashlights

• Constant current power supplies

The MIC2289 is available in a 2mm × 2mm 8-pin MLF™

package and has a junction temperature range of –40°C to

+125°C.

All support documentation can be found on Micrel’s web

site at www.micrel.com.

Typical Application

3-Series LED Efficiency

10µH

MIC2289-15BML

VIN

1-Cell

Li Ion

1µF

0.22µF/16V

OUT

95mV

GND

V_IN=3.6V

6.3Ω

(mA)

OUT

3-Series White LED Driver

MicroLeadFrame and MLF are trademarks of Amkor Technology, Inc.

Micrel, Inc. • 1849 Fortune Drive • San Jose, CA 95131 • USA • tel + 1 (408) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com

M9999-081104

August, 2004

12 3 4 5 6 7...9

中文翻译

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与MIC2289-15YMLTR相关器件

型号	品牌	获取价格	描述	数据表
MIC2289-15YML-TR	MICROCHIP	获取价格	LED DISPLAY DRIVER, DSO8
MIC2289-15YML-TX	MICROCHIP	获取价格	LED Driver
MIC2289-24BML	MICREL	获取价格	2mm 】 2mm White LED Driver with Internal Scho
MIC2289-24BMLTR	MICROCHIP	获取价格	LED Driver, 3-Segment, 2 X 2 MM, MLF-8
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

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