MP1519

1x, 1.5x, 2x High Efficiency Charge Pump

4 White LED Driver

MP1519 Rev. 1.9

www.MonolithicPower.com

1

7/27/2006

MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.

© 2006 MPS. All Rights Reserved.

The Future of Analog IC Technology

TM

TM

DESCRIPTION

The MP1519 is a fully automatic driver for

powering four white LEDs, with up to 4V

forward voltage, from a single Li-Ion or three

NiMH cells. The driver performs all of the

sensing and control to run the LEDs at an

optimum charge pump ratio for efficiency

without an expensive inductor. The driver

allows PWM operation to support brightness

control.

The tiny 3mm x 3mm QFN16 package and

small external capacitors allow for the most

compact white LED solution available.

EVALUATION BOARD REFERENCE

Board Number

Dimensions

EV0042

2.4”X x 1.9”Y x 0.4”Z

FEATURES

• 2% LED Current Matching

• High Efficiency (>93%)

• Current Source Outputs

• No Ballast Resistors Required

• 1x, 1.5x and 2x Automatic Modes

• Constant Frequency Operation

• Automatic LED Detection

• High and Low Frequency PWM Capability

• 2.5V to 5.5V Operation

• Detects Changes in Battery Level

• No External Schottky Diode Required

• Soft-Start and Soft Switching Operation

APPLICATIONS

• Cell Phones

• PDA or Hand Held Computers

• White LED Application at 3.6V Supply

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

Power Systems, Inc.

TYPICAL APPLICATION

MP1519

C1A

C1B

C2A

C2B

LED1

LED2

LED3

LED4

BATT

EN

RADJ

GND

LEDC

GND

ENABLE

BATT

LED4

LED3

LED2

LED1

4

7

6

9

14

15

16

5, 13

12

11

3, 10

8

1

100

90

80

70

60

50

40

30

20

10

0

2.5

3.0

3.5

4.0

4.5

SUPPLY VOLTAGE (V)

Efficiency vs

Supply Voltage