Linear PSU?

PSUs: The source of DC power for all components in the PC & often a big noise source.

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EV10
Posts: 42
Joined: Sat Apr 14, 2007 1:14 pm

Linear PSU?

Post by EV10 » Thu Apr 19, 2007 5:58 am

I don't think I'll do it even if it's going to work, but I'm still wondering.
What about using a linear PSU for the computer, like ones used in amplifiers, and basically all analog equipment?

Transformer, rectifier bridge, filtering capacitors, stabilizer circuit - seems feasible enough. Enough quality for analog, and reliable as a rock. From what I know of electronics, it seems feasible enough. The issue could probably be proper stabilization, due to high currents involved. Maybe a preliminary voltage stabilizer could solve input power issue?
Also, are there any other problems?
Last edited by EV10 on Thu Apr 19, 2007 2:33 pm, edited 1 time in total.

disphenoidal
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Location: USA

Post by disphenoidal » Thu Apr 19, 2007 6:31 am

The efficiency will be much lower than a switched mode device. Also, why bother?

EV10
Posts: 42
Joined: Sat Apr 14, 2007 1:14 pm

Post by EV10 » Thu Apr 19, 2007 7:55 am

Mostly out of academic interest.

Efficiency... Well, a decent transformer-rectifier-capacitor block can reach efficiency of 95%. Stabilizer has to offset it, but devices with linear PSU use fans only when pumping really high loads. So it shouldn't be bad, or at least worse than usually.
Last edited by EV10 on Thu Apr 19, 2007 1:17 pm, edited 1 time in total.

Oleg Artamonov
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Post by Oleg Artamonov » Thu Apr 19, 2007 11:23 am

EV10 wrote:So it shouldn't be bad
About 50%, may be less. ;)

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