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參數(shù)資料
| 型號： | MP1519L |
| 廠商： | Monolithic Power Systems, Inc. |
| 英文描述： | 1x, 1.5x, 2x High Efficiency Charge Pump 3 White LED Driver |
| 中文描述： | 1倍，1.5倍，2倍高效充電泵白光LED驅(qū)動器3 |
| 文件頁數(shù)： | 1/9頁 |
| 文件大?。?/td> | 249K |
| 代理商： | MP1519L |
The Future of Analog IC Technology
MP1519L
1x, 1.5x, 2x High Efficiency Charge Pump
3 White LED Driver
MP1519L Rev. 1.3
7/27/2006
www.MonolithicPower.com
1
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
2006 MPS. All Rights Reserved.
TM
TM
DESCRIPTION
The MP1519L is 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.
EVALUATION BOARD REFERENCE
Board Number
EV1519DQL-00A
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
MP1519L
C1A
C1B
C2A
C2B
LED1
LED2
LED3
BATT
EN
RADJ
GND
LEDC
GND
ENABLE
BATT
LED3
LED2
LED1
4
7
6
9
14
15
16
5, 13
12
11
3, 10
8
100
90
80
70
60
50
40
30
20
10
E
2.5
3.0
SUPPLY VOLTAGE (V)
3.5
4.0
4.5
I
LED
=20mA
I
LED
=10mA
I
LED
=5mA
Efficiency vs
Supply Voltage
V
LED
= 3.23V @ 20mA
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