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How does the Xenon Flash in Lumia; or, if fact any compact device work

by PrashntS
Tags: compact, device, fact, flash, lumia, work, xenon
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PrashntS
#1
May13-13, 08:53 AM
P: 25
I don't need basics, I know the causes how xenon flash "works" ; I need to know how do they minimise this kind of circuit in microprocessor?

My question: The Flash tubes require kVs of potential difference to work. I am aware that big capacitors are required to make them work. This is okay upto digital cameras where they can put big capacitors.
But cell phones? I read somewhere that microprocessors can't have big capacitors. So how come they work?
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Borek
#2
May13-13, 09:16 AM
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Why do you think the capacitor is part of a micropocessor? It can be a standard capacitor, mounted separately.
PrashntS
#3
May13-13, 09:22 AM
P: 25
I mean to ask if there is some other work around. Putting massive capacitor in a cell phone is nearly impossible.

jim hardy
#4
May13-13, 09:52 AM
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How does the Xenon Flash in Lumia; or, if fact any compact device work

here's some reading for you

http://www.osram-os.com/osram_os/en/...kturl=pr-OSLUX



http://www.xenon-technologies.com/us...at_05oct10.pdf

http://powerelectronics.com/mobile/s...h-applications


these two describe cellphone xenon lamp drivers
http://cds.linear.com/docs/en/applic...note/an98f.pdf
http://cds.linear.com/docs/en/applic...note/an95f.pdf

Take a dead one apart and see how they did it.. you can become the expert !
Borek
#5
May13-13, 10:03 AM
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From what I have seen capacitors in these devices are surprisingly small. Last year I have replaced the shutter button in my idiot camera, and from what I remember whole flash module was small enough to fit in my mobile - granted, my mobile is not the Lumia, but also the flash module was not designed to be slim.
Windadct
#6
May13-13, 01:14 PM
P: 554
Most cell phones I have seen use LEDs.


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