[time-nuts] Re: Death of a Capacitor

[Lux, Jim]

On 9/27/21 7:22 AM, John Ackermann N8UR wrote:
> Indeed, Dana.  Texas Instruments has a nice "designer workbench" for 
> their switching regulators like the TPS53400 to help select the 
> components.  Using that worked much better than trying to follow the 
> data sheet circuits.
>
> I also found that high ESR caps, particularly on the output, are 
> important.  And also that you don't want to slowly ramp up the input 
> voltage for testing, as the thing will start sqealing if fed with 
> voltage way below the output.  You want a quick start at the working 
> input voltage. 


yes, you don't want to be too "soft start" on the upstream converter.