TM
MP1519 – 1X, 1.5X, 2X CHARGE PUMP 4 WHITE LED DRIVER
PIN FUNCTIONS
Pin # Name Description
#4 LED Driver. Connect the #4 LED between LED4 and LEDC, with the anode at LED4, and
the cathode at LEDC. If the #4 LED is not used, leave LED4 unconnected.
1
2
LED4
NC No Connect.
3, 10 GND Ground.
Charge Pump Capacitor #1 Positive Node. Connect the positive side of the #1 charge pump
capacitor to C1A. Typical applications require C1 to be 1μF.
4
C1A
Battery Power Input. Connect the 2.5V to 5.5V input source between BATT and GND. Bypass
BATT to GND with a 1μF or greater capacitor.
5, 13 BATT
Charge Pump Capacitor #2 Positive Node. Connect the positive side of the #2 charge pump
capacitor to C2A. Typical applications require C2 to be 1μF.
6
7
C2A
C1B
Charge Pump Capacitor #1 Negative Node. Connect the negative side of the #1 charge pump
capacitor to C1B.
LED Common for the Cathodes. Connect the cathodes of the LEDs to LEDC and to a 4.7μF
8
LEDC bypass capacitor. Do not connect to any other ground, supply or pin.
Note: Exposed pad on backside is connected to this pin. Do Not Ground.
Charge Pump Capacitor #2 Negative Node. Connect the negative side of the #2 charge pump
capacitor to C2B.
9
C2B
LED Current Adjust Input. Connect a resistor between RADJ and GND to set the LED current.
All of the LEDs regulate at the same current. See Setting the LED Current.
11
12
14
15
16
RADJ
Enable Input. Drive EN high to turn on the MP1519, drive EN low to shutdown the MP1519. To
use burst-mode brightness control, drive EN with a PWM signal. See Burst Mode Dimming.
EN
#1 LED Driver. Connect the #1 LED between LED1 and LEDC, with the anode at LED1, and
the cathode at LEDC. If the #1 LED is not used, leave LED1 unconnected.
LED1
#2 LED Driver. Connect the #2 LED between LED2 and LEDC, with the anode at LED2, and
the cathode at LEDC. If the #2 LED is not used, leave LED2 unconnected.
LED2
#3 LED Driver. Connect the #3 LED between LED3 and LEDC, with the anode at LED3, and
the cathode at LEDC. If the #3 LED is not used, leave LED3 unconnected.
LED3
MP1519 Rev. 1.9
10/8/2007
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4
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