Datasheet > MIC2297

MIC2297

更新时间： 2024-11-13 21:55:43

品牌	Logo	应用领域
麦瑞 - MICREL		驱动器稳压器
页数	文件大小	规格书
12页	273K
描述
40V PWM Boost Regulator White LED Driver

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中文翻译

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MIC2297 数据手册

MIC2297

40V PWM Boost Regulator

White LED Driver

General Description

Features

The MIC2297 is a 600KHz PWM boost-switching regulator

that is optimized for driving 6-10 series white LEDs. With

its internal 40V switch and a guaranteed switch current of

1.2A, the MIC2297 easily drives a string of 10 white LEDs

in series at 20mA, ensuring a high level of brightness and

eliminating several ballast resistors.

•

2.5V to 10V input voltage range

Output voltage up to 40V

1.2A switch current

600KHz PWM operation

Trimmed 200mV feedback voltage

Output over voltage protection (fixed or adjustable)

PWM Brightness Control

The MIC2297 implements constant frequency 600KHz

PWM control. The high frequency PWM operation saves

board space by reducing external component sizes. The

added benefit of the constant frequency PWM operation is

much lower noise and input ripple injected back to the

battery source than with variable frequency topologies.

DAC Brightness Control

<1% line regulation

1µA shutdown current

Over temperature protection

UVLO

To optimize efficiency, the feedback voltage is set to

200mV. This reduced voltage reduces the power

dissipation in the current set resistor, and allows the lowest

total output voltage, hence minimal current draw from the

battery.

2.5mm x 2.5mm MLF™-10L package

–40^oC to +125^oC junction temperature range

Applications

The MIC2297 is available with output over-voltage

protection that protects the IC and external components in

case of open LED conditions.

•

PDAs

GPS systems

Smart phones

Mini PCs

The MIC2297 is available in low profile small size 2.5mm x

2.5mm MLF™-10L package. The MIC2297 has a junction

temperature range of –40°C to +125°C.

Digital cameras

IP phones

LED flashlights

___________________________________________________________________________________________________________

Typical Applications

6.8µH-22µH

VIN

0.47µF

/50V

0.47µF

/50V

1µF

OVP

PWM

1µF

OVP

1-Cell

Li Ion

1-Cell

Li Ion

MIC2297

-42BML

MIC2297

-42BML

BRT

REF

BRT

3V to 4.2V

REF

1µF

COMP

AGND PGND COMP

AGND PGND

0.1µF

10 Series LED Driver with Output OVP

10 Series LED Driver with PWM Brightness Control

MLF and MicroLeadFrame is a trademark of Amkor Technology

Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel +1 (408) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com

M9999-050305

(408) 955-1690

May 2005

12 3 4 5 6 7...12

中文翻译

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与MIC2297相关器件

型号	品牌	获取价格	描述	数据表
MIC2297_08	MICREL	获取价格	40V PWM Boost Regulator White LED Driver
MIC2297-15YML	MICREL	获取价格	40V PWM Boost Regulator White LED Driver
MIC2297-15YML	MICROCHIP	获取价格	3A SWITCHING REGULATOR, 675kHz SWITCHING FREQ-MAX, PDSO10
MIC2297-15YMLTR	MICREL	获取价格	暂无描述
MIC2297-15YMLTR	MICROCHIP	获取价格	3A SWITCHING REGULATOR, 675kHz SWITCHING FREQ-MAX, PDSO10, 2.50 X 2.50 MM, LEAD FREE, MLF-
MIC2297-42YML	ROCHESTER	获取价格	3A SWITCHING REGULATOR, 675kHz SWITCHING FREQ-MAX, PDSO10, 2.50 X 2.50 MM, LEAD FREE, MLF-
MIC2297-42YML	MICREL	获取价格	40V PWM Boost Regulator White LED Driver
MIC2297-42YMLTR	MICROCHIP	获取价格	3A SWITCHING REGULATOR, 675kHz SWITCHING FREQ-MAX, PDSO10, 2.50 X 2.50 MM, LEAD FREE, MLF-
MIC2297-42YMLTR	ROCHESTER	获取价格	3 A SWITCHING REGULATOR, 675 kHz SWITCHING FREQ-MAX, PDSO10, 2.50 X 2.50 MM, LEAD FREE, ML
MIC2298	MICREL	获取价格	3.5A Minimum, 1MHz Boost High Brightness White LED Driver

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