Battery and a Power Supply working in tandem?

Thunau · 22nd March 2006, 11:22 PM

I posted this question somewhere else, but it got moved to PS design forum. I don't think it gets the trafic needed to get a quick answer. Anyway, the question is, can I paralell a switching 100W 12V power supply with a car battery to power a car amp that can draw more than 100W? Will it be safe for the power supply and the battery? Should I use some kind of diode circuit to prevent damage?

space · 23rd March 2006, 08:59 PM

You probably could, but it all depends on how the PSU will cope with repeated overload stresses/shutdowns over a long period of time. Some might be fine, others not. Some PSU's will not go back on if one trigs the over current protection unless one resets it. A "simpler" unregulated charger will probably cope better with this and regulate it self better at over current situations.

space

22nd March 2006, 11:22 PM	#1
Thunau diyAudio Member Join Date: Mar 2001 Location: PA USA	Battery and a Power Supply working in tandem? I posted this question somewhere else, but it got moved to PS design forum. I don't think it gets the trafic needed to get a quick answer. Anyway, the question is, can I paralell a switching 100W 12V power supply with a car battery to power a car amp that can draw more than 100W? Will it be safe for the power supply and the battery? Should I use some kind of diode circuit to prevent damage? __________________ "Most people just say what they know, the wise ones know just what to say."

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23rd March 2006, 08:59 PM	#2
space diyAudio Member Join Date: Jan 2004 Location: Oslo - Norway	You probably could, but it all depends on how the PSU will cope with repeated overload stresses/shutdowns over a long period of time. Some might be fine, others not. Some PSU's will not go back on if one trigs the over current protection unless one resets it. A "simpler" unregulated charger will probably cope better with this and regulate it self better at over current situations. space