MP3011 Ver la hoja de datos (PDF) - Monolithic Power Systems
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MP3011 Datasheet PDF : 8 Pages
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TM
MP3011
1x, 1.5x, 2x High Efficiency Charge Pump
2 White LED Driver
The Future of Analog IC Technology TM
DESCRIPTION
FEATURES
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” x 1.9” x 0.4”
• 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
MP3011
5, 13
4
BATT C1A
ENABLE
12
EN
7
C1B
11
6
RADJ C2A
GND
3, 10
GND
9
C2B
15
LED1
8
16
LEDC LED2
LED2
LED1
MP3011_TAC01
Efficiency vs
Supply Voltage
VLED = 3.35V @ 40mA
100 ILED=10mA
90
ILED=40mA
80
70
60
50
40
ILED=20mA
30
20
10
0
2.5 3.0 3.5 4.0 4.5
SUPPLY VOLTAGE (V)
MP3011_EC01
MP3011 Rev. 1.1
www.MonolithicPower.com
1
10/31/2005
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
© 2005 MPS. All Rights Reserved.
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