DC Bias Effect for MLCCs
When a DC voltage is applied to class-2 and class-3 multilayer ceramic capacitors(MLCCs), like X7R or Y5V, they lose capactiance. For commerical and automotive grade capacitors, manufacturers typically do not specify this coefficient, or loss.
Military-Grade MLCCs with a two letter designator like BX will have a specified voltage coefficient.
KEMET’s KSIM tool can be used to estimate the DC Bias for a KEMET MLCC.
Tuesday, August 11th, 2015