Tweakers' Asylum Tweaks for systems, rooms and Do It Yourself (DIY) help. FAQ. |
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In Reply to: RE: help modding LPS to get different output voltage posted by boodles on October 21, 2020 at 17:17:15:
Duster probably knows more about computer power demands than I do. But the device itself determines how much current is drawn from the supply, not the supply. The supply just has to produce the current being demanded from it.
Also, does the "100VA" rating apply to the power transformer; is there a sticker on the transformer that reads 100VA? If so, that probably does tell you that the transformer has enough juice to work with your new computer, but it does not tell you about downstream circuitry, like the voltage regulator circuit I mentioned. Really rigorous regulation of an audio device would entail using a constant current source before the voltage regulator. Then the output of the voltage regulator could go to the device. So re-setting the LPS to meet the demands of your new computer might mean that the constant current source needs adjustment, as well as the voltage output. The CCS itself could be limiting current to the extent that you cannot raise the voltage above 16.8V, because at 16.8V and whatever is the current demand of the computer, the regulation craps out. Increase the current and you might be able to adjust V up to 20V.
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- One comment... - Lew 10/23/2008:05:06 10/23/20 (0)