Timeline for How to derate a ceramic capacitor for DC bias
Current License: CC BY-SA 3.0
8 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Nov 4, 2023 at 14:55 | comment | added | Igor Katkov | The linked article above from @NickAlexeev is now here analog.com/en/technical-articles/… | |
| Jan 17, 2017 at 0:02 | comment | added | Russell McMahon♦ | Peripheral: As you care about ceramic characteristics more than many (as one should :-) ). Be aware that ceramic caps can exhibit ringing when hit with a step waveform and at eg power turn on have been known to cause voltage spikes high enough to destroy eg following regulators. | Microphonic effects may happen - percussion to signal. | |
| Jan 16, 2017 at 23:35 | comment | added | Nick Alexeev | My go-to application note on the subject: Temperature and Voltage Variation of Ceramic Capacitors, or Why Your 4.7µF Capacitor Becomes a 0.33µF Capacitor. | |
| Jan 16, 2017 at 23:10 | comment | added | Spehro Pefhany | As @winny says, there seems to be considerable variation between manufacturers. Often you have to go beyond the datasheet to use software or web-based information from the maker. If they don't supply it, then you're in the dark. | |
| Jan 16, 2017 at 22:57 | answer | added | Tony Stewart EE75 | timeline score: 8 | |
| Jan 16, 2017 at 22:34 | comment | added | Jason_L_Bens | I noticed in LTpowerCAD that the caps have C nominal, C at half rated voltage, and C at rated voltage fields. I wonder if anyone's got some insight into how they work that? Fit a parabola? SPICE sim behind the scenes? | |
| Jan 16, 2017 at 22:22 | comment | added | winny | Last time I checked - no. Each manufacturer, size and dielectricum has its own curve. | |
| Jan 16, 2017 at 22:13 | history | asked | Jason_L_Bens | CC BY-SA 3.0 |