TM
MP1519L – 1X, 1.5X, 2X CHARGE PUMP 3 WHITE LED DRIVER
LEDC
Do not drive or force LEDC as it may be
shorted to ground or may be pumped down by
the controller in the MP1519L at any time.
Excessive capacitance on the LEDC node can
cause the internal controller to time out before
the charge pump can be ready. Missing the
timeouts will cause excessive pumping and a
loss of efficiency. The MP1519L requires C1
and C2 be of the same value and type.
TYPICAL APPLICATION CIRCUIT
BATT
ENABLE
V
DC
0V to 3V
GND
5, 13
MP1519L
BATT
C1A
4
12
EN
11
RADJ
3, 10
C2A
C1B
7
6
GND
9
C2B
14
LED1
LED2
8
15
LEDC
LED3
16
LED3
LED2
LED1
Figure 3—Analog Dimming Circuit
MP1519L Rev. 1.3
7/27/2006
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