| Electronics > Projects, Designs, and Technical Stuff |
| Simple car radio battery automatic cut off |
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| simcop2387:
--- Quote from: DBecker on April 25, 2020, 06:04:03 pm ---Yes, that's a good regulator for this purpose. Not especially cheap, but readily available at a good qnty-one price. High side switches are effectively a P-MOSFET, but the features (temperature and current protection, direct logic level input, gate protection) well worth the price when you need robustness or it's a low volume design. --- End quote --- I've already got a fuse on there so I'm not worried about the current protection and I'm not terribly worried about temperature either since this'll be internal to the dash (though all the parts are rated for 85C or so in non-use. I've also rated the mosfet to be able to handle many times as much current as it'll normally see (3A typical, 10A circuit) so I'm not worried about it overheating either, and if needed I can throw a heatsink on it to get the full 20A it's rated for. That said if I was going to run a more complicated device I'd probably really look at one of those they sound nice. |
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