Datasheet > MP1488

MP1488

更新时间： 2024-11-19 12:56:43

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芯源 - MPS		/
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描述
800mA Fixed Frequency White LED Driver

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MP1488 数据手册

MP1488

800mA Fixed Frequency

White LED Driver

The Future of Analog IC Technology

MPS CONFIDENTIAL AND PROPRIETARY INFORMATION – TCL USE ONLY

DESCRIPTION

FEATURES

The MP1488 is a step-up converter designed for

driving up to 27 WLEDs (9 strings of 3 WLEDs

each) from a 5V system rail. The MP1488 uses a

current mode, fixed frequency architecture to

regulate the LED current, which is measured

through an external current sense resistor. Its low

104mV feedback voltage reduces power loss and

improves efficiency. The OV pin monitors the

output voltage and turns off the converter if an

over-voltage condition is present due to an open

circuit condition.

•

2.5V to 6V Input Voltage Range

On Board Power MOSFET

Drives up to 27 White LEDs at 5V Input

Up to 92% Efficiency

Over 1MHz Fixed Switching Frequency

Open Load Shutdown

Low 104mV Feedback Voltage

Soft-Start/PWM Dimming

UVLO, Thermal Shutdown

Internal 800mA Current Limit

Available in a TSOT23-6 Package

The MP1488 includes under-voltage lockout,

current limiting and thermal overload protection

preventing damage in the event of an output

overload.

APPLICATIONS

•

Cell Phones

Handheld Computers and PDAs

Digital Still Cameras

Small LCD Displays

The MP1488 is available in a small 6-pin TSOT23

package.

“MPS” and “The Future of Analog IC Technology” are Registered Trademarks of

Monolithic Power Systems, Inc.

TYPICAL APPLICATION

Efficiency vs

Input Voltage

100

=100mA

OUT

=180mA

OUT

MP1488

GND

4.0

4.5

5.0

5.5

6.0

INPUT VOLTAGE (V)

MP1488 Rev. 0.9

4/17/2008

www.MonolithicPower.com

MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.

12 3 4 5 6 7 8

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