Board, communications device, and method for supplying power for board

摘要

A board includes a functional module, and further includes n switch modules, where first ends of the n switch modules are connected to the functional module, and second ends of the n switch modules are connected to n main power interface units respectively, where n is an integer greater than or equal to 2; and a power supply selecting module connected to control ends of the n switch modules, where the power supply selecting module is configured to detect residual power of the n main power interface units, select, from main power interface units with residual power greater than or equal to rated power of the board, a main power interface unit with lowest residual power as a power supply interface unit, and control a switch module connected to the power supply interface unit to be switched on.

主权项

1. A board, comprising:
a power consuming load that implements a service of the board; n switch modules, wherein first ends of the n switch modules are all connected to the power consuming load, wherein second ends of the n switch modules are connected to n main power interface units respectively, and wherein n is an integer greater than or equal to two; and a power supply selector connected to control ends of the n switch modules, wherein the power supply selector is configured to:
detect residual power of the is main power interface units;select, from the n main power interlace units with residual power greater than or equal to rated power of the board, a main power interface unit with lowest residual power as a power supply interface unit; andcontrol, a switch module connected to the power supply interface unit to be switched from off to on.