7345AW: [nslu2-general] NSLU2 using 7805s and a 12V battery
- May 3 6:11 AMEfil,
7V*1.5A=10.5W (even more heat!!)
>So far, I've tried a few different regulators (rated 1 or 1.5 amps), andwhen I turn the NSLU2 on, after about 30 seconds, the regulators are too hot
to touch and soon shut themselves down.
They are rated 1 or 1.5A as long as you take care on proper cooling
>I'm not sure what the problem is.You quite likely forgot the hitsink for the regulator
> I connected the regulators in parallel with each other to provide up to 3amps (more than the NSLU2 power supply), so I figured that I wouldn't need
heatsinks for them. Am I wrong, or is my NSLU2 just behaving strangely?
Conneting them in parallel makes a shortage on their output. Never ever do
that!!! It is OK to do so with transistors, but not with power regulators
that have protection circuits in them.
I would search for a DC/DC-converter that converts your 12V down to 5V but
without converting the voltage difference into heat. Those DC/DC-comvertrs
actuaklly comnvert the input DC into an AC, route it through a transformer
and rectify it again. The loss within the transformer is little compared to
the loss you would have in a normal regulator (with ist proper heatsink
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