TM
EV1519DQL-00A
1x, 1.5x, 2x High Efficiency Charge Pump
3 White LED Driver Evaluation Board
The Future of Analog IC Technology
TM
DESCRIPTION
The EV1519DQL-00A is an evaluation board for
the MP1519, 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.
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 1µA 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
ELECTRICAL SPECIFICATIONS
Parameter
# of WLEDs
Input Voltage
LED Current
Symbol
V
IN
I
LED
Value
3
2.5 – 5.5
20
Units
V
mA
APPLICATIONS
“MPS” and “The Future of Analog IC Technology” are Trademarks of Monolithic
Power Systems, Inc.
EV1519DQL-00A EVALUATION BOARD
Efficiency vs
Supply Voltage
100
90
80
70
60
50
40
30
20
10
2.5
3.0
3.5
4.0
SUPPLY VOLTAGE (V)
4.5
I
LED
=10mA
V
LED
= 3.23V @ 20mA
I
LED
=5mA
I
LED
=20mA
Dimensions (2.3”X x 1.8”Y x 0.4”Z)
Board Number
EV1519DQL-00A
MPS IC Number
MP1519DQL
EFFICIENCY (%)
MP1519L_EC01
EV1519DQL-00A Rev. 1.1
10/27/2005
www.MonolithicPower.com
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
© 2005 MPS. All Rights Reserved.
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MPS [ MONOLITHIC POWER SYSTEMS ]
