Jim Jackson wrote:
>>> Maybe a simple voltage conversion circuit can help? The LM7805 is a
>>> handy little device, even if it's not the most efficient possible
>>> solution, it's easy enough to use.
>>>
>> Inefficient alright - from 12v to 5v it would waste over 50% power, not to
>> mention heating the regulator. My project is a small solar powered boat
>> which will need to operate 24 hours a day. Low power consumption was
>> the primary reason I got this particular board.
>>
> For powering my TS7200 from a "12V" Lead Acid battery, I purchased a little
> switchmode PSU module that substitutes for a 7805, and has a wide input
> voltage range. The part is PT5101 from Powertrends. I bought mine from
> Farnell here in the UK. It will supply upto 1 amp and they claim efficiency
> of over 90% at an input voltage of 16v
I'll second the Powertrends modules, I've used the +5v, +12 and -12
modules in the past in industrial environments and we had next to no
problems with them. Definitely higher MTBF then a 78xx regulator. I
think Powertrends might have been bought out by someone else, not sure
who tho I think maybe TI.
--
Jason Stahls
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