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Old 9th October 2011, 10:35 AM   #1
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Default 500W 12V to 45V Invertor PSU For Car Audio!!!

This is absolute a cool gadget for audio DIYers. It convert 12V from car battery to dual 45V DC power supply for audio amplifiers. Voltage is adjustable by adding feedback resistors in parallel with the on board res. The max power is up to 500W! Don't tell me it's not enough for your car audio...
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500W 12V to 45V car audio PSU

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Last edited by siliconray; 9th October 2011 at 10:39 AM.
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Old 10th October 2011, 01:35 PM   #2
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Did a test today with a electronic load. The voltage was set to 45V, current set to 6A. Postive and negative output are tested seperated because the electronic load don't have dual input :-)
Positive voltage dropped from 45.1V to 44.7V and negative voltage drops from -45.1V to -44.8V. Result is quite positive.
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Old 12th October 2011, 12:09 AM   #3
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what voltage can it be reduced to?
25-28v +/-?
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Old 12th October 2011, 12:20 AM   #4
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can be down to 15V. Only need to add a resistor in parallel to the voltage feedback resistor.
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Old 31st October 2011, 05:21 AM   #5
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More pics. The newest version upgrated the MOSFET with a more powerful part. Output is more stable.

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Old 16th November 2011, 07:07 AM   #6
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Default How to enable the module

Hello customers, sorry for the valgue instruction. To enable the modue, the pad marked with R must be connected to +12V. See the photo attached
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File Type: jpg enable.jpg (148.1 KB, 88 views)
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Old 16th November 2011, 07:13 AM   #7
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Default Hot to modify the voltage

Just solder 2 resistors to modify the output voltage. See the attached photo
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File Type: jpg v-setting.jpg (255.4 KB, 144 views)
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Old 17th January 2012, 03:32 PM   #8
norazmi is offline norazmi  Malaysia
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this board have short circuit protection?
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Old 17th January 2012, 11:29 PM   #9
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Yes it is short circut protected.
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Old 23rd February 2012, 04:50 AM   #10
JZatopa is offline JZatopa  United States
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I have been looking for something like this, now I just need to find the right chassis.
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