鈥?/div>
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
碌
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
The Future of Analog IC Technology
TM
DESCRIPTION
The MP3011 is a fully automatic driver for
powering two 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
EV3011DQ-00A
Dimensions
2.4鈥?x 1.9鈥?x 0.4鈥?/div>
APPLICATIONS
鈥淢PS鈥?and 鈥淭he Future of Analog IC Technology鈥?are Trademarks of Monolithic
Power Systems, Inc.
TYPICAL APPLICATION
MP3011
BATT
ENABLE
5, 13
BATT
C1A
4
Efficiency vs
Supply Voltage
100
90
80
EFFICIENCY (%)
V
LED
= 3.35V @ 40mA
I
LED
=10mA
I
LED
=40mA
12
EN
C1B
7
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
=20mA
GND
3, 10
GND
C2B
LED1
9
15
16
8
LEDC
LED2
LED2
LED1
MP3011_TAC01
MP3011_EC01
MP3011 Rev. 1.1
10/31/2005
www.MonolithicPower.com
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
漏 2005 MPS. All Rights Reserved.
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