TM
MP1519
1x, 1.5x, 2x High Efficiency Charge Pump
4 White LED Driver
The Future of Analog IC Technology
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.
FEATURES
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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 1
µ
A Leakage during Shutdown
Detects Changes in Battery Level
No External Schottky Diode Required
Soft-Start and Soft Switching Operation
Cell Phones
PDA or Hand Held Computers
White LED Application at 3.6V Supply
EVALUATION BOARD REFERENCE
Board Number
EV0042
Dimensions
2.4”X x 1.9”Y x 0.4”Z
APPLICATIONS
“MPS” and “The Future of Analog IC Technology” are Trademarks of Monolithic
Power Systems, Inc.
TYPICAL APPLICATION
MP1519
BATT
ENABLE
5, 13
BATT
C1A
4
Efficiency vs
Supply Voltage
100
90
80
EFFICIENCY (%)
12
EN
C1B
7
V
LED
= 3.35V @ 20mA
I
LED
=5mA
I
LED
=20mA
11
RADJ
C2A
6
70
60
50
40
30
20
10
0
2.5
3.0
3.5
4.0
SUPPLY VOLTAGE (V)
4.5
I
LED
=10mA
GND
3, 10
GND
C2B
LED1
LED2
9
14
15
16
1
8
LEDC
LED3
LED4
LED4
LED3
LED2
LED1
MP1519 Rev. 1.9
7/27/2006
www.MonolithicPower.com
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
© 2006 MPS. All Rights Reserved.
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