Phone camera flash control circuit

Posted on Nov 10, 2015

200mA peak current letter phone photo camera flash circuit, using a AAT3110-4.5 electrical capacitive charge pump chip, the phone lithium battery voltage boost and regulated to

Phone camera flash control circuit
Click here to download the full size of the above Circuit.

4.5V, to a group of light-emitting diode (LED) provide work for the voltage and 100 ~ 200mA peak current. The peak current through the switch as a flash of VF form a loop. The charge pump input filter capacitor capacitance of lOtiF, output filter capacitor electric capacity 4. 7vF, storage capacitor capacitance of ltiF. Ri, LED light-emitting tube balancing resistor. RP is the peak current regulation section resistance, adjust the resistance of RP can be set peak current size.

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