• Disclaimer: This Vendor's Forum is a paid-for commercial area. Unlike the rest of diyAudio, the Vendor has complete control of what may or may not be posted in this forum. If you wish to discuss technical matters outside the bounds of what is permitted by the Vendor, please use the non-commercial areas of diyAudio to do so.

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...
See details here:
500W 12V to ±45V car audio PSU

[IMGDEAD]http://www.siliconray.com/media/catalog/product/cache/1/image/9df78eab33525d08d6e5fb8d27136e95/c/a/car-audio-power-1.jpg[/IMGDEAD]

[IMGDEAD]http://www.siliconray.com/media/catalog/product/cache/1/image/9df78eab33525d08d6e5fb8d27136e95/c/a/car-audio-power-3.jpg[/IMGDEAD]
 
Last edited:

siliconray

Member
2011-09-28 3:23 pm
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.
 

siliconray

Member
2011-09-28 3:23 pm
More pics. The newest version upgrated the MOSFET with a more powerful part. Output is more stable.

[IMGDEAD]http://gallery.siliconray.com/var/resizes/Power-supply/500W-12V-to-%2B-45V-car-audio-power-inverter/DSCN8813.JPG?m=1320038006[/IMGDEAD]
[IMGDEAD]http://gallery.siliconray.com/var/resizes/Power-supply/500W-12V-to-%2B-45V-car-audio-power-inverter/DSCN8808.JPG?m=1320038016[/IMGDEAD]
[IMGDEAD]http://gallery.siliconray.com/var/resizes/Power-supply/500W-12V-to-%2B-45V-car-audio-power-inverter/DSCN8809.JPG?m=1320038012[/IMGDEAD]
 

siliconray

Member
2011-09-28 3:23 pm
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
 

Attachments

  • enable.jpg
    enable.jpg
    148.1 KB · Views: 101
Hello s sorry for the late reply.

Please look at the schematic below:
[IMGDEAD]http://gallery.siliconray.com/var/resizes/Power-supply/500W-12V-to-%2B-45V-car-audio-power-inverter/tl494.pdf3.jpg?m=1334731135[/IMGDEAD]
the feedback network is formed by R24//R20 + R11 and R21//R25 + R22. Voltage on Pin14 is 5.0V. The voltage on Pin15 must equal to pin 16. R20 and R21 is actually 82.6ko. It's not quite complicate to calcualte the value of R24 and R25 with this conditions.