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Old 1st December 2004, 11:02 PM   #1
DSchmidt is offline DSchmidt  United States
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Default Car Amp Power Supply

I've got a basic question about building a power supply for a car amp. Generally, do you go to 110V AC and then use a standard transformer or are there step-up transformers that are used to get up to about 35V dc?
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Old 2nd December 2004, 12:11 AM   #2
tsmith1315 is offline tsmith1315  United States
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Typically car amps use switching power supplies. DC from the battery is chopped into quasi-square waves by switching transistors. This AC can be stepped up and filtered for whatever voltage your amp needs.

It's definitely more complicated than a typical 110V to DC supply.

Do a search in the Car Audio forum for SMPS or Switch Mode Power Supply, and you should find plenty of discussion and links.

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Old 31st March 2011, 05:27 PM   #3
harp mg is offline harp mg
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build this one . it works!
Switchmode Power Supply For Car Audio
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