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WEBENCH® Tools: MLCC DC bias effect

Yuri Arbeletche
Prodigy 40 points

Tool/software: WEBENCH® Design Tools

Hi, 

Does WEBENCH take into account the effect of DC bias voltage in MLCC's capacitance? 

I mean, I have an application in which WEBENCH suggested a 10uF 100V as input capacitance. The input voltage is set to be from 30V to 40V. Looking at the suggested capacitor's datasheet, I found that when the DC voltage is 40V, the original capacitance drops to 50% (5uF). The same effect wil happen to all other MLCC on the circuit.

Does WEBENCH cope with this situation?

Thank you,

Yuri