MP1519L データシートの表示（PDF） - Monolithic Power Systems

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MP1519L

1x, 1.5x, 2x High Efficiency Charge Pump 3 White LED Driver

Monolithic Power Systems 

TM

MP1519L

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

3 White LED Driver

The Future of Analog IC Technology TM

DESCRIPTION

The MP1519L is a fully automatic driver for

powering three 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

EV1519DQL-00A

Dimensions

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

• Less than 1µA Leakage during Shutdown

• 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

BATT

ENABLE

GND

MP1519L

5, 13

4

BATT C1A

12

EN

7

C1B

11

6

RADJ C2A

3, 10

GND

9

C2B

14

LED1

15

LED2

8

16

LEDC LED3

LED3

LED2

LED1

Efficiency vs

Supply Voltage

VLED = 3.23V @ 20mA

100 ILED=5mA

90

ILED=20mA

80

70

60

50

ILED=10mA

40

30

20

10

2.5 3.0 3.5 4.0 4.5

SUPPLY VOLTAGE (V)

MP1519L Rev. 1.3

www.MonolithicPower.com

1

7/27/2006

MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.

© 2006 MPS. All Rights Reserved.

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