MP1519L – 1X, 1.5X, 2X CHARGE PUMP 3 WHITE LED DRIVER

MP1519L Rev. 1.3

www.MonolithicPower.com

4

7/27/2006

MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.

© 2006 MPS. All Rights Reserved.

TM

PIN FUNCTIONS

Pin #

Name Description

1, 2

NC

No Connect.

3, 10

GND Ground.

4

C1A

Charge Pump Capacitor #1 Positive Node. Connect the positive side of the #1 charge pump

capacitor to C1A. Typical applications require C1 to be 1µF.

5, 13

BATT

Battery Power Input. Connect the 2.5V to 5.5V input source between BATT and GND. Bypass

BATT to GND with a 1µF or greater capacitor.

6

C2A

Charge Pump Capacitor #2 Positive Node. Connect the positive side of the #2 charge pump

capacitor to C2A. Typical applications require C2 to be 1µF.

7

C1B

Charge Pump Capacitor #1 Negative Node. Connect the negative side of the #1 charge pump

capacitor to C1B.

8

LEDC

LED Common for the Cathodes. Connect the cathodes of the LEDs to LEDC and to a 4.7µF

bypass capacitor. Do not connect to any other ground, supply or pin.

Note: Exposed pad on backside is connected to this pin. Do Not Ground.

9

C2B

Charge Pump Capacitor #2 Negative Node. Connect the negative side of the #2 charge pump

capacitor to C2B.

11

RADJ

LED Current Adjust Input. Connect a resistor between RADJ and GND to set the LED current.

All of the LEDs regulate at the same current. See Setting the LED Current.

12

EN

Enable Input. Drive EN high to turn on the MP1519L, drive EN low to shutdown the MP1519L.

To use burst-mode brightness control, drive EN with a PWM signal. See Burst Mode Dimming.

14

LED1

#1 LED Driver. Connect the #1 LED between LED1 and LEDC, with the anode at LED1, and

the cathode at LEDC.

15

LED2

#2 LED Driver. Connect the #2 LED between LED2 and LEDC, with the anode at LED2, and

the cathode at LEDC.

16

LED3

#3 LED Driver. Connect the #3 LED between LED3 and LEDC, with the anode at LED3, and

the cathode at LEDC.