In an architecture with multiple pre-regulators, separate pre-regulators are used for high- and low-side bias power supply devices. This architecture can be preferable from a functional safety point of view. If one of the pre-regulator circuits has an issue or failure, the other pre-regulator circuit can still provide power to the low- or high-side gate drivers. A safe state can be achieved as all low-side or all high-side gate drivers continue to be controlled. Such architecture from a power perspective can help to achieve the safe state in the vehicle if an unfavorable event occurs.

Figure 2-2 Two Pre-Regulators in a Fully-Distributed Architecture