The diode should be selected according to the maximum expected output current in the application, as shown in Table 1. While the single-component input reverse voltage protection solution will have the smallest footprint in low-power applications, for high currents, the diode needed is much larger.
The ideal diode controllers have all the features necessary to implement an efficient and fast reverse polarity protection circuit. They also include a load disconnect function in case of overvoltage and undervoltage events. With an 80V capability, they are suitable for all 12V and 24V batteries.
This application note explores the principles and advantages of ORing and power multiplexing using ideal diode controllers, examines various circuit topologies, and addresses the key design challenges and mitigation strategies for automotive power systems.
The ideal diode controller is an efficient solution to providing input reverse polarity protection. Choosing the right MOSFET to go with the ideal diode controller is just as important and, by following some simple steps, it can be quite easy.
Each module within a vehicle will tend to have both reverse battery polarity protection (shown here as a diode, but often implemented as a MOSFET) and a TVS device to protect that module from transients.
Feature (s) Fast Switching Speed Surface-Mount Package Ideally Suited for Automated Insertion For General Purpose Switching Applications Two Diode Elements Connected in a Common Anode Configuration Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2) Halogen and Antimony Free. “Green” Device (Note 3)
