參數資料
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驅動器3
文件頁數： 5/9頁
文件大?。?/td> 249K
代理商： MP1519L
MP1519L – 1X, 1.5X, 2X CHARGE PUMP 3 WHITE LED DRIVER
MP1519L Rev. 1.3
7/27/2006
www.MonolithicPower.com
5
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
2006 MPS. All Rights Reserved.
TM
OPERATION
The MP1519L is a charge pump that drives 3
LEDs from a 2.5V to 5.5V input voltage. It
automatically switches between 1x, 1.5x and 2x
charge pump modes to optimize efficiency while
maintaining LED current regulation.
Three drivers independently regulate the
current through the LEDs, therefore matching
LEDs are not required.
The MP1519L employs soft switching and
soft-start to prevent overloading the battery
source at turn-on and charge pump mode
switching.
While operating, the MP1519L continually
monitors the LED current and battery voltage
and automatically switches between charge
pump modes to retain LED current regulation
through all LEDs as the battery voltage
fluctuates.
CURRENT
GENERATOR
CONTROLLER
LED
ENABLE
ISET
SHUTDOWN
RADJ
GND
3, 10
EN
12
BATT
5, 13
11
CHARGE PUMP
1.25V
BANDGAP
REFERENCE
BATTERY
SENSOR
PUMP
MODE
SOFT
START
LED3
LED2
LED1
FAULT
CURRENT
SOURCE
FAULT
CURRENT
SOURCE
FAULT
CURRENT
SOURCE
C2B
BATT
ENABLE
C2A
C1B
C1A
LEDC
LED3
LED2
LED1
9
6
7
4
8
16
15
14
Figure 1—Functional Block Diagram
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