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

MP1519L Rev. 1.3

www.MonolithicPower.com

7

7/27/2006

MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.

© 2006 MPS. All Rights Reserved.

TM

LEDC

Do not drive or force LEDC as it may be

shorted to ground or may be pumped down by

the controller in the MP1519L at any time.

Excessive capacitance on the LEDC node can

cause the internal controller to time out before

the charge pump can be ready. Missing the

timeouts will cause excessive pumping and a

loss of efficiency. The MP1519L requires C1

and C2 be of the same value and type.

TYPICAL APPLICATION CIRCUIT

MP1519L

C1A

C1B

C2A

C2B

LED1

LED2

LED3

BATT

EN

RADJ

GND

LEDC

GND

ENABLE

BATT

LED3

LED2

LED1

0V to 3V

4

7

6

9

14

15

16

5, 13

12

11

3, 10

8

Figure 3—Analog Dimming Circuit