MP3011DQ Ver la hoja de datos (PDF) - Monolithic Power Systems
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MP3011DQ Datasheet PDF : 8 Pages
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TM
MP3011 – 1X, 1.5X, 2X AUTO-ADJUST CHARGE PUMP 2 WHITE LED DRIVER
PIN FUNCTIONS
Pin # Name Description
1, 2, 14
3, 10
4
5, 13
6
7
8
9
11
12
15
16
NC
GND
C1A
BATT
C2A
C1B
LEDC
C2B
RADJ
EN
LED1
LED2
No Connect.
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.
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.
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.
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
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.
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.
Enable Input. Drive EN high to turn on the MP3011, drive EN low to shutdown the MP3011.
To use burst-mode brightness control, drive EN with a PWM signal. See Burst Mode
Dimming.
#1 LED Driver. Connect the #1 LED between LED1 and LEDC, with the anode at LED1, and
the cathode at LEDC.
#2 LED Driver. Connect the #2 LED between LED2 and LEDC, with the anode at LED2, and
the cathode at LEDC.
MP3011 Rev. 1.1
www.MonolithicPower.com
4
10/31/2005
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
© 2005 MPS. All Rights Reserved.
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