| Electronics > Projects, Designs, and Technical Stuff |
| Why is my microcontroller and Mosfets failing in this circuit? |
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| Siwastaja:
For power line protection, zener/TVS speed is a nonissue, as capacitors can be used to absorb the quick spike. For high bandwidth signals, adding capacitance would be an issue. An SMD MLCC with its low inductance and low ESR easily absorbs such spikes. Parallel it with a high-ESR capacitance with Chi_esr > 2..3 * Clow_esr to prevent ringing. For example, a 470uF cheap electrolytic paralleled with a 2.2uF 0805 capacitor would do the trick. Then, the clamping can be slow (any zener or TVS). |
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