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Buck boost converter blowing fuses
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Dunk_c:
Hi
I have a small cheap regulated buck-boost DC converter that sits between my 12v solar system and a portable lithium ion battery bank. The device is used to convert the variable battery voltage to a constant 15V required by the lithium battery bank for charging.
The B-B converter is portable for use in a vehicle so operates of a cigarette plug with fuse. Nearly every time I disconnect the battery bank the fuse blows presumably as the inductor coil fields collapse. This might be a big problem when used in the car. I don’t know if the battery is also experiencing a current surge but that would probably be bad! What is the fix for this? Can I stop it by inserting a couple of power diodes in series with the positive input and output lines?
Cheers
AVGresponding:
It would help to know more, such as the fuse rating, battery pack details, solar PV details...
Zero999:
A simple schematic would also help.
It does seem odd it's blowing the fuse when the battery is disconnected.
And what's a B-B converter? Don't you mean a DC:DC converter? EDIT: Duh, Buck Boost converter. :palm:
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