Datasheet > MIC2289C-34BD6

MIC2289C-34BD6

更新时间： 2024-11-27 04:59:07

品牌	Logo	应用领域
麦瑞 - MICREL		驱动器肖特基二极管接口集成电路光电二极管
页数	文件大小	规格书
9页	247K
描述
White LED Driver Internal Schottky Diode and OVP

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中文翻译

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MIC2289C-34BD6 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 with OVP

• Internal Schottky diode

• 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

• Thin SOT-23 6-pin package

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

• For higher performance specifications see the MIC2289

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.

Applications

The MIC2289C clamps the output voltage in case of open

LED conditions, protecting itself and the output capacitor.

The MIC2289C is available with an output OVP option of

34V.

• White LED driver for backlighting:

– Cell phones

– PDAs

– GPS systems

– Digital cameras

– MP3 players

The MIC2289C is available in low profile 6-pin Thin SOT-

23 package. The MIC2289C 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.

– IP phones

• LED ﬂashlights

• Constant current power supplies

Typical Application

10µH

3-Series LED Efficiency

MIC2289C-34YD6

VIN

1-Cell

Li Ion

1µF

0.22µF/50V

OUT

95mV

GND

V_IN=3.6V

15 20 25

I_OUT(mA)

7-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

M9999-081507-B

August 2007

12 3 4 5 6 7...9

中文翻译

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与MIC2289C-34BD6相关器件

型号	品牌	获取价格	描述	数据表
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
MIC2289C-34YD6-TX1	MICROCHIP	获取价格	LED Driver, 7-Segment, PDSO6
MIC2289C-34YML	MICREL	获取价格	White LED Driver Internal Schottky Diode and OVP
MIC2289CBD5	MICREL	获取价格	White LED Driver Internal Schottky Diode and OVP
MIC2289CYD5	MICREL	获取价格	White LED Driver Internal Schottky Diode and OVP
MIC2290	MICREL	获取价格	2mm 】 2mm PWM Boost Regulator with Internal S
MIC2290	MICROCHIP	获取价格	The MIC2290 is a 1.2MHz , PWM, boost-switching regulator. The MIC2290 features an inte
MIC2290_07	MICREL	获取价格	2mm 】 2mm PWM Boost Regulator with Internal S

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