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roofingboom
Joined: 03 Oct 2005
Posts: 84
Helped: 1
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 12 Sep 2006 18:46 suggested power supply |
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I am looking for sugestions of a suitable chip for a 5 and 3.3v power supply from either a 12 or 24 volt battery. problem is i must survive starter dip which is about 3 volts for 80ms and then 6 volts while the starter is cranking.
I really do not want to use a flyback in this situation. I would like to use a buck boost so i am looking for suggestions please!
thanks
the output will be 3 amps for 3.3v and the 5 volts will only use like 500mA max. i was thinking of a buck boost to 3.3v and then boosting 3.3v to 5 volts since i will not be using much current at 5 votls.
let me know what you guys think
THanks
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doss
Joined: 22 Mar 2006
Posts: 2
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| 13 Sep 2006 12:27 Re: suggested power supply |
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I think u can use pt6303,6302 switching regulator from texas intruments thank u,
[size=9][color=#999999]Added after 1 minutes:[/color][/size]
I think u can use pt6303,6302 switching regulator from texas intruments thank u,
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dfullmer
Joined: 07 Jun 2006
Posts: 239
Helped: 33
Location: Some place Hot - Not an Island
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| 13 Sep 2006 15:53 Re: suggested power supply |
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Hi roofingboom,
If space and cost are not a big deal then you might want to solve the problem by making ourself a mini-UPS for the supply. You could use a small gel cell battery to supply power to your regulator for the short time it needs while the starter is running and then revert back to a charge mode once your power comes back. The regulator could then switch over to the 12-24v source.
more costly but pretty sure fire way around the problem and sometimes thats what counts.
good luck
dfullmer
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