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How to use MOS tube instead of diode to prevent reverse connection of the circuit in the picture?

Hardware design
December 08, 2020 by Perry 1362

As shown in the circuit, how to use MOS tube instead of diode to prevent reverse connection?

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Marion Posted on December 8, 2020

The transistor should work, but the MOS tube doesn't know how to connect it as a diode.

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Howard Posted on December 8, 2020

The main reason is that the MOS tube conduction voltage drop is extremely small, but I really didn't think of a good way to protect the two sets of batteries that may be damaged by reverse charging. The transistor voltage drop is also large.

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Renata Posted on December 8, 2020

If it is only anti-reverse connection, why not use anti-reverse connection?

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  • Perry

    Perry Posted on December 8, 2020

    Oh, it's mainly a structured battery compartment, like a flashlight. There is no way to make joints in structure. So it can only be realized by circuits. Thank you

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Hank Posted on December 8, 2020

Battery compartment? This is easier.


Generally, the negative electrode of the battery is flat and the positive electrode is convex.


This is the anti-reverse design of the battery itself.


For a qualified battery compartment (holder), the negative pole of the battery cannot be contacted when the battery is reversed.

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