Electronics > Beginners
problems controlling voltage spikes when connecting voltage
frich:
i think i will try to make some tests with different caps to see if i can reduce the spikes.
i am quite constrained with space, so realy have to be as small as possible.
just in case that doesnt work, would it be possible to make a custom buck converter, that would be able to handle up to something like 60V input ?
and if so is that something that requires alot of knowledge to even start to look at ? maybe one of you have a good suggestion on a voltage regulator to use ?
David Hess:
--- Quote from: frich on February 16, 2020, 05:30:37 pm ---just in case that doesnt work, would it be possible to make a custom buck converter, that would be able to handle up to something like 60V input ?
and if so is that something that requires alot of knowledge to even start to look at ? maybe one of you have a good suggestion on a voltage regulator to use ?
--- End quote ---
There are buck regulators intended to operate in an automotive environment which support 60 volt surges. Or a series transistor could be added to the input. The common solution if a capacitor is not suitable was suggested by Deni; add a suitable TVS.
frich:
okay
please enlighten me thou, what is a TVS ?
better yet, is the a list of common abbreviations ? took me quite a while to track down ESR earlier :)
Deni:
TVS == Transient Voltage Suppressor. You can visualize it as a very fast Zener diode. Also, they can absorb much higher amount of energy than Zeners.
See more here https://en.wikipedia.org/wiki/Transient-voltage-suppression_diode
David Hess:
TVS diodes are exactly like zener or avalanche diodes because that is what they are. They are not any faster but are processed to have a uniform junction like avalanche rectifiers so that at high currents, hot spots do not develop. The junction is suppose to breakdown uniformly.
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