Datasheet > MIC2289C

MIC2289C

更新时间： 2024-01-22 13:30:25

品牌	Logo	应用领域
麦瑞 - MICREL		驱动器肖特基二极管
页数	文件大小	规格书
10页	273K
描述
White LED Driver Internal Schottky Diode and OVP

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中文翻译

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MIC2289C 数据手册

MIC2289C

White LED Driver Internal Schottky

Diode and OVP

General Description

Features

The MIC2289C is a PWM (pulse width modulated), boost-

switching regulator that is optimized for constant-current

white LED driver applications. The MIC2289C 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

• <1% line and load regulation

• <1µA shutdown current

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.

• Overtemperature protection

• UVLO

The MIC2289C 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

• For higher performance specifications see the MIC2289

The MIC2289C clamps the output voltage in case of open

LED conditions, protecting itself and the output capacitor.

The MIC2289C is available with three output OVP options

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

use of the smallest possible output capacitor with the

appropriate voltage rating for a given application.

Applications

• White LED driver for backlighting:

– Cell phones

– PDAs

– GPS systems

The MIC2289C is available in low profile 5-pin Thin SOT-

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

MIC2289C has a junction temperature range of –40°C to

+125°C.

– Digital cameras

– MP3 players

– IP phones

• 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

MIC2289C-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

M9999-090706

September 2006

12 3 4 5 6 7...10

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与MIC2289C相关器件

型号	品牌	获取价格	描述	数据表
MIC2289C_07	MICREL	获取价格	White LED Driver Internal Schottky Diode and OVP
MIC2289C_11	MICREL	获取价格	White LED Driver Internal Schottky Diode and OVP
MIC2289C-15BML	MICREL	获取价格	White LED Driver Internal Schottky Diode and OVP
MIC2289C-15YML	MICREL	获取价格	White LED Driver Internal Schottky Diode and OVP
MIC2289C-24BML	MICREL	获取价格	White LED Driver Internal Schottky Diode and OVP
MIC2289C-24YML	MICREL	获取价格	White LED Driver Internal Schottky Diode and OVP
MIC2289C-34BD6	MICREL	获取价格	White LED Driver Internal Schottky Diode and OVP
MIC2289C-34BML	MICREL	获取价格	White LED Driver Internal Schottky Diode and OVP
MIC2289C-34YD6	MICREL	获取价格	White LED Driver Internal Schottky Diode and OVP
MIC2289C-34YD6-TR	MICROCHIP	获取价格	IC LED DRIVER RGLTR DIM TSOT23-6

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