MP3214 – 500mA LED CAMERA FLASH CHARGE PUMP

MP3214 Rev. 1.01

www.MonolithicPower.com

4

6/24/2011

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PIN FUNCTIONS

Pin #

Name Description

1

CP

Charge pump bypass for common anode version. Connect a 2.2µF bypass capacitor to GND.

2

C2B

Charge Pump Capacitor #2 Negative Node. Connect the negative side of the #2 charge pump

capacitor to C2B.

3

C1B

Charge Pump Capacitor #1 Negative Node. Connect the negative side of the #1 charge pump

capacitor to C1B.

4

C1A

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.

5,9

6

C2A

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.

7

VIN

Battery Power Input. Connect the 2.5V to 5.5V input source between BATT and GND. Bypass

BATT to GND with a 2.2µF or greater capacitor.

8

EN

Enable input.

10

TOE

Time Out Enable. With TOE=1 the time out is enabled. The device will keep operating for a

period of time after the EN pin goes low.

11

ISET

Current Control Input. Connect a resistor between ISET and GND to set the LED current up

to 500mA.

12,13,16

NC

No connection.

14,15

IOUT

Driver for Flashlight. Connect the flashlight LED between this pin and BATT, with the anode

at BATT.

BLOCK DIAGRAM

Figure 1—Functional Block Diagram