Migrating from 48V bus bars to ±400V or ±800V bus bars reduces copper losses by lowering current. However, this migration also poses challenges for the ORing circuits, which must sense and withstand the higher voltages. Figure 4-8 presents a 400V DC high-side ORing design with a low-voltage ORing controller. In this design, the voltage sensing is handled by voltage clamping circuits, and the bias power of the controller is supplied by an isolated power supply, which can minimize the static power consumption.

Figure 4-8 400V High-Side ORing