MP1519DQ-LF-Z Datasheet, PDF (1/8 Pages) MPS Industries, Inc. – 1x, 1.5x, 2x High Efficiency Charge Pump 4 White LED Driver

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.
EVALUATION BOARD REFERENCE
Board Number
EV0042
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
MP1519
BATT
5, 13
4
BATT C1A
ENABLE
12
EN
7
C1B
11
6
RADJ C2A
GND
3, 10
GND
9
C2B
14
LED1
15
LED2
8
16
LEDC LED3
1
LED4
LED4
LED3
LED2
LED1
Efficiency vs
Supply Voltage
V_LED = 3.35V @ 20mA
100
90
I_LED=5mA
I_LED=20mA
80
70
60
50
40
I_LED=10mA
30
20
10
0
2.5 3.0 3.5 4.0 4.5
SUPPLY VOLTAGE (V)
MP1519 Rev. 1.9
www.MonolithicPower.com
1
10/8/2007
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
© 2007 MPS. All Rights Reserved.