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I bought a lab PSU device and I would like to use it to charge 1.2 V batteries. However the manual says that it's not reverse voltage protected and it might get damaged. After some research I found out there are some MOSFET modules or IdealDiodes that can protect against reverse voltage back to the PSU. Please see Figure 2, I'm not talking about reverse polarity. As I am intending to use it to charge low voltage batteries 0-12 V, does any module exist for this that you can connect in between the PSU and the battery? Or what would be the best transistor for this?

Reverse polarity vs reverse voltage

Null
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Shuman Rotula
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  • Just connect the polarity up correctly. I have been using lab supplies for more than 20 years and as far as I remember I have never once, not ever connected something up with reversed polarity. – user57037 Dec 11 '20 at 04:10
  • if it's a small current you are charging with and want a simple solution you can just use a diode – Alex Novickis Dec 11 '20 at 03:58

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Build your own polarity protection yourself. It's fun and cheap. Using a diode is inefficient due to constant current flow through the diode itself and forward voltage drop.

vLaude
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