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-   -   500W 12V to 45V Invertor PSU For Car Audio!!! (https://www.diyaudio.com/forums/siliconray-online-electronics-store/198174-500w-12v-45v-invertor-psu-car-audio.html)

JZatopa 27th February 2012 03:36 AM

I have a quick question. If I were to use this at +/- 18V, could it handle the continuous power draw of 2 F5 amplifier boards?

siliconray 27th February 2012 04:13 AM

Hi DJNBUZ, how many amper does one F1 board need? the module can supply max 15A current

JZatopa 27th February 2012 04:24 AM

The F 5 needs about 1.3A, with +/-24Vdc (not sure why I used 18V). That is continuous current, though.

siliconray 27th February 2012 04:27 AM

oh..then it's more than enough.

AudioSan 27th February 2012 06:45 PM

the F5 will draw up to 2.6A pr ch.
1.3A at idle and up to the point it switch to class B.
but yes. it can be used on 2ch of F5.

JZatopa 1st March 2012 05:09 AM

Thanks

th3bl0b 11th April 2012 03:57 PM

I had a quick question regarding this module. How do you set the output voltage to be less? I know that you just have to put a resistor in parallel but say I wanted +/- 25V what value would I put in parallel?

JZatopa 17th April 2012 04:27 PM

I would also like to know this. Is it possible to soldier in a pot here? If so what would you recommend?

th3bl0b 17th April 2012 04:34 PM

What I've found is that... you can determine your new output voltage by using the following equation...

45V / 82.6kohms = new voltage / new equivalent resistance.

siliconray 18th April 2012 06:46 AM

Hello s sorry for the late reply.

Please look at the schematic below:
An externally hosted image should be here but it no longer works. Please upload images instead of linking to them to prevent this.

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.


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