| 摘要 |
In an example embodiment, a power switching circuit of an automobile audio bus (A 2 B) chip is provided in a bi-directional, multi-node two-wire conductor system that includes a plurality of A 2 B chips interconnected on a twisted wire pair bus (A 2 B bus), with at least one A 2 B chip functioning as a master and the remaining A 2 B chips functioning as slaves. The power switching circuit of the A 2 B chip powers up a next downstream A 2 B chip in the A 2 B bus sequentially according to a power switching procedure, and the power switching circuit is configured to detect faults in the A 2 B bus before, during, and after the power switching procedure. Each A 2 B chip enables power to the next downstream A 2 B chip without risk of damage to any components in the system due to line faults on the downstream A 2 B bus, or collapse of the power supply at the local A 2 B chip. |
