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From: Sylvia Else <sylvia@email.invalid>
Newsgroups: sci.electronics.design
Subject: Re: power supply discharge
Date: Fri, 27 Sep 2024 23:50:21 +0800
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On 27-Sept-24 11:07 pm, john larkin wrote:
> 
> Given a benchtop power supply, you can turn the voltage up and then
> down, and it goes down. Most have a substantial amount of output
> capacitance, and can be driving an external cap too. So something
> pulls the output down.
> 
> I guess that there are no standards for this, but I've never seen a
> supply that just hangs high when it's cranked down.
> 
> I'm designing some programmable multi-channel power suplies and that
> is one of many tangled issues in the project.
> 

Be easy enough to sink current when the output voltage exceeds the set 
point by more than, say, 0.1V.

But there has to be a limit - connect the PS to your fully charged car 
battery, and set the PS to 10V, and you're not going to see a 10V output 
any time soon.

Sylvia.