[ARC5] Cool New DC-DC Converter

[Bob kb8tq]

Hi

The real point is that a “250V” cap may or may not have a max rating of exactly 250.0V.
It may indeed have an actual max voltage on that sample a bit higher than 250V. These 
days it’s very much a “who knows” sort of thing. 

Oddly enough the same rule that says “don’t use the last 10	%” also says “don’t use less
than 60%” on an electrolytic cap. Learned that one in a design review …. on product headed
for space no less …. gulp ….

Bob

> On Mar 18, 2018, at 12:06 PM, Scott Robinson <spr at earthlink.net> wrote:
> 
> Well, a switching power supply designer who is even older than I am told me that if you avoid the using the last 10% or so of an electrolytic cap's voltage rating that it will last longer.
> 
> FWIW,
> 
> Scott Robinson
> 
> On 3/18/18 7:33 AM, Bob kb8tq wrote:
>> Hi
>> 
>> In some cases, indeed a 250V cap is quite happy for a very long time at 300V. It’s not
>> all “great balls of fire” sort of stuff ….
>> Bob