TM
MP1519L – 1X, 1.5X, 2X CHARGE PUMP 3 WHITE LED DRIVER
TYPICAL PERFORMANCE CHARACTERISTICS
Voltage Ripple
in 1.5x Mode
3 x 10mA LEDs
V
BATT
20mV/div.
V
LEDC
20mV/div.
Startup in 1.5x Mode
3 x 10mA LEDs
Startup in 1x Mode
3 x 10mA LEDs
V
EN
2V/div.
V
LEDC
1V/div.
V
EN
2V/div.
V
LEDC
1V/div.
I
BATT
100mA/div.
I
BATT
100mA/div.
Analog Dimming
16
14
LED CURRENT (mA)
Circuit of Figure 3, V
BATT
= 3.6V
12
11
10
9
8
7
LED Current Matching
LED3
12
10
8
6
4
2
0
0
1
2
DC VOLTAGE (V)
3
LED CURRENT (mA)
LED2
LED1
6
2.5
3.0
3.5
4.0
SUPPLY VOLTAGE (V)
4.5
MP1519L Rev. 1.3
7/27/2006
www.MonolithicPower.com
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© 2006 MPS. All Rights Reserved.
3