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Fabricante

MP3011DQ

1x, 1.5x, 2x High Efficiency Charge Pump 2 White LED Driver

Monolithic Power Systems 

TM

MP3011 – 1X, 1.5X, 2X AUTO-ADJUST CHARGE PUMP 2 WHITE LED DRIVER

OPERATION

The MP3011 is a charge pump that drives 2

LEDs from a 2.5V to 5.5V input voltage. It

automatically switches between 1x, 1.5x and 2x

charge pump modes to optimize efficiency while

maintaining LED current regulation.

Two drivers independently regulate the current

through the LEDs, therefore matching LEDs are

not required.

The MP3011 employs soft switching and

soft-start to prevent overloading the battery

source at turn-on as well as charge pump mode

switching.

While operating, the MP3011 continually

monitors the LED current and battery voltage

and automatically switches between charge

pump modes to retain LED current regulation

through all LEDs as the battery voltage

fluctuates.

BATT

ENABLE

BATT

5, 13

BATTERY

SENSOR

FAULT

CURRENT

SOURCE

LED1

15

EN

12

RADJ

11

CONTROLLER

FAULT

CURRENT

SOURCE

SHUTDOWN

CURRENT

GENERATOR

LED

ENABLE

ISET

PUMP SOFT

MODE START

1.25V

BANDGAP

REFERENCE

CHARGE PUMP

GND

3, 10

Figure 1—Functional Block Diagram

LED2

16

LED2 LED1

LEDC

8

C1A

4

C1B

7

C2A

6

C2B

9

MP3011_F01_BD01

MP3011 Rev. 1.1

www.MonolithicPower.com

5

10/31/2005

MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.

© 2005 MPS. All Rights Reserved.

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