| Electronics > Beginners |
| Blown mosfet : I don't know why |
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| ratatax:
This is super interesting. I measured my 12V in when switching on and it has a peak to about 20V. It shoudn't be what destroyed the mosfet, but I'll try to damped it a bit just to be safer on the long run ! My custom DC/DC converter has a 10 uF + 100nF mlcc input cap. |
| Siwastaja:
Add a plain old cheap electrolytic capacitor with C many times the C of the MLCCs. For your case, say anything over 47uF does the trick. Having high-ESR capacitance on the DC bus dampens oscillations, but also limits the voltage rise in case you have an inductive load discharging back to the bus. |
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