Thanks Martin
Very detailed. Much appreciated.
Ian
> On 20 May 2022, at 19:00, Dekatron42 wrote:
>
>
> If I remember correctly my colleagues spoke about the normal capacitor
> reforming by applying voltage to them after long storage (1-2years or more in
> storage) and also the
If I remember correctly my colleagues spoke about the normal capacitor
reforming by applying voltage to them after long storage (1-2years or more
in storage) and also the "resetting" that they are subjected to when
soldering: https://ec.kemet.com/blog/mlcc-dielectric-differences/
" Ceramic
Could someone explain what the reforming involves ?
Thanks
Ian
> On 20 May 2022, at 06:12, SWISSNIXIE - Jonathan F.
> wrote:
>
> I've used a MAX1771 with ceramic capacitors a while ago for a
> pandicon-circuit and a smaller nixie project. Both consume less than
> 15mA@170V. Not sure how
I've used a MAX1771 with ceramic capacitors a while ago for a
pandicon-circuit and a smaller nixie project. Both consume less than
15mA@170V. Not sure how the circuit would behave at more current.
On Thursday, 19 May 2022 at 20:03:18 UTC+2 Dekatron42 wrote:
> A few other things that I
A few other things that I experienced at my previous employer was that
larger (sizewise) MLCC capacitors easily developed cracks, came loose from
the circuit board and also needed reforming after storage.
/Martin
On Thursday, 19 May 2022 at 05:01:25 UTC+2 mo...@neonixie.com wrote:
> Roger,
>
Roger,
Yes. Looks like the common dielectrics (X7T, X7R) available in the 250v
1-3uf range suffer from a 30-80% reduction in capacitance at 180v. I hadn't
realized it was that high.
Thank you, I'll look at the polymer caps. It's my last remaining
electrolytic on my board and if possible I
Thank you. Yes, I almost forgot about the DC bias voltage :(
https://passive-components.eu/dc-and-ac-bias-dependence-of-mlcc-capacitors-including-temperature-dependence/
You are right, most of the ceramic caps I was looking at don't publish any
data on decrease due to DC bias. I may try it
Hi Moses,
What David writes below about the capacitance reduction of ceramic capacitors
is correct.
I have experienced success using polymer aluminium electrolytics (solid
electrolyte) to replace conventional low-ESR electrolytic capacitors that
regularly fail in similar applications.
You
I haven't tried it, but I can make some observations. The MAX1771 isn't
connected directly to the output circuit, so it's not likely to suffer from
a problem. The current flows through the inductor which will accommodate a
momentary short circuit caused by the capacitor.
In short, it shouldn't be
