Capacitance versus voltage for X7S caps?
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From: Joerg on 26 Mar 2010 21:05 legg wrote: > On Fri, 26 Mar 2010 06:59:10 -0700, Joerg <invalid(a)invalid.invalid> > wrote: > >> legg wrote: > >> And that's not telling anything about voltage tolerance. The temp curves >> are usually in the datasheets, voltage graphs aren't anymore :-) >> > The TDK graphing utility is really quite good. Perhaps you might > encourage this kind of data service by buying only those parts for > which info IS provided. > > TDK will even plot multiple selections on the same axis - just be very > general about your initial selections - voltage, body size and maybe > tempco. > > http://www.tdk.co.jp/ccv/index.asp > -> "No results were found" :-( I could try over and over again to make it spit out a capacitance over voltage graph, on the client's nickel. Or just move on to another brand ... > I'm sure they're not the only vendor still supplying useful data. Just > be sure to label an store it for easy retrieval, once obtained, to > save trouble the next time around. > Why can't they simply put it in the datasheet like it used to be done in the good old days? To be honest I am not very fond of online tools, they are often frustrating. For example, National's WebBench told me numerous times that my switcher could not be designed. All of them went into mass production :-) -- Regards, Joerg http://www.analogconsultants.com/ "gmail" domain blocked because of excessive spam. Use another domain or send PM.
From: John Devereux on 27 Mar 2010 04:35 Joerg <invalid(a)invalid.invalid> writes: > legg wrote: >> On Fri, 26 Mar 2010 06:59:10 -0700, Joerg <invalid(a)invalid.invalid> >> wrote: >> >>> legg wrote: >> >>> And that's not telling anything about voltage tolerance. The temp >>> curves are usually in the datasheets, voltage graphs aren't anymore >>> :-) >>> >> The TDK graphing utility is really quite good. Perhaps you might >> encourage this kind of data service by buying only those parts for >> which info IS provided. >> >> TDK will even plot multiple selections on the same axis - just be very >> general about your initial selections - voltage, body size and maybe >> tempco. >> >> http://www.tdk.co.jp/ccv/index.asp >> > > -> "No results were found" :-( > > I could try over and over again to make it spit out a capacitance over > voltage graph, on the client's nickel. Or just move on to another > brand ... Works fine for me - quite nice, I agree it should be in the datasheet. > > >> I'm sure they're not the only vendor still supplying useful data. Just >> be sure to label an store it for easy retrieval, once obtained, to >> save trouble the next time around. >> > > Why can't they simply put it in the datasheet like it used to be done > in the good old days? To be honest I am not very fond of online tools, > they are often frustrating. For example, National's WebBench told me > numerous times that my switcher could not be designed. All of them > went into mass production :-) -- John Devereux
From: Joerg on 27 Mar 2010 11:56 John Devereux wrote: > Joerg <invalid(a)invalid.invalid> writes: > >> legg wrote: >>> On Fri, 26 Mar 2010 06:59:10 -0700, Joerg <invalid(a)invalid.invalid> >>> wrote: >>> >>>> legg wrote: >>>> And that's not telling anything about voltage tolerance. The temp >>>> curves are usually in the datasheets, voltage graphs aren't anymore >>>> :-) >>>> >>> The TDK graphing utility is really quite good. Perhaps you might >>> encourage this kind of data service by buying only those parts for >>> which info IS provided. >>> >>> TDK will even plot multiple selections on the same axis - just be very >>> general about your initial selections - voltage, body size and maybe >>> tempco. >>> >>> http://www.tdk.co.jp/ccv/index.asp >>> >> -> "No results were found" :-( >> >> I could try over and over again to make it spit out a capacitance over >> voltage graph, on the client's nickel. Or just move on to another >> brand ... > > Works fine for me - quite nice, I agree it should be in the datasheet. > Maybe I am doing something wrong with the search input fields. How do you get the capacitance versus voltage graph for the TDK capacitor with the part number C4532X7S2A475M ? [...] -- Regards, Joerg http://www.analogconsultants.com/ "gmail" domain blocked because of excessive spam. Use another domain or send PM.
From: legg on 28 Mar 2010 13:02 On Sat, 27 Mar 2010 08:56:48 -0700, Joerg <invalid(a)invalid.invalid> wrote: >Maybe I am doing something wrong with the search input fields. How do >you get the capacitance versus voltage graph for the TDK capacitor with >the part number C4532X7S2A475M ? > Drop the last letter or use C4532X7S2A475K I found this by specifying a characteristics search in multilayer capacitors >0.1uF, then specifying tempco (x7s) and series (4532) If you select only a voltage range, impedance range and frequency, you will be offered a window allowing comparison of all suitable part numbers individually or on the same graphs, regardless of body size or tempco or class. This is the easiest way to see X7R and X7S offerings, side by side. RL
From: JosephKK on 28 Mar 2010 14:56
On Sat, 27 Mar 2010 08:56:48 -0700, Joerg <invalid(a)invalid.invalid> wrote: >John Devereux wrote: >> Joerg <invalid(a)invalid.invalid> writes: >> >>> legg wrote: >>>> On Fri, 26 Mar 2010 06:59:10 -0700, Joerg <invalid(a)invalid.invalid> >>>> wrote: >>>> >>>>> legg wrote: >>>>> And that's not telling anything about voltage tolerance. The temp >>>>> curves are usually in the datasheets, voltage graphs aren't anymore >>>>> :-) >>>>> >>>> The TDK graphing utility is really quite good. Perhaps you might >>>> encourage this kind of data service by buying only those parts for >>>> which info IS provided. >>>> >>>> TDK will even plot multiple selections on the same axis - just be very >>>> general about your initial selections - voltage, body size and maybe >>>> tempco. >>>> >>>> http://www.tdk.co.jp/ccv/index.asp >>>> >>> -> "No results were found" :-( >>> >>> I could try over and over again to make it spit out a capacitance over >>> voltage graph, on the client's nickel. Or just move on to another >>> brand ... >> >> Works fine for me - quite nice, I agree it should be in the datasheet. >> > >Maybe I am doing something wrong with the search input fields. How do >you get the capacitance versus voltage graph for the TDK capacitor with >the part number C4532X7S2A475M ? > >[...] Since you stated 4.7 uF @ 100 V i looked in the medium voltage list, under 4.5mm x 3.2mm [EIA 1812] and there is at the bottom of the list. -60 % at 50 V. |