Here are some design ideas for implementing reverse polarity protection circuits in battery-connected automotive systems.

Here is a detailed view of reverse polarity protection circuits for safeguarding battery-connected automotive systems.

[Afroman’s] latest video shows you how to add reverse ... or a polarity mistake with your bench PSU doesn’t damage that hardware. It’s easy enough to plop in a diode for protection, but ...

There are two ways to use an NFET in a reverse-polarity protection circuit. Most simply, it can be connected in the ground return path (Fig. 3). The operation is analogous to that of the PFET ...

Figure 1 A series diode protects systems from reverse polarity but wastes power in diode losses. Figure 2 You can use a bridge rectifier so that your system works no matter what the input polarity is.