BROWNOUT AVOIDANCE

摘要

Examples of the disclosure are directed to methods of managing power of various modules of an electronic device to prevent the voltage of the battery from falling to an undervoltage lockout (UVLO) threshold. In some examples, software operating on the electronic device or an associated electronic device (e.g., a paired electronic device) may assign power budgets to one or more modules, thereby preventing each module from drawing its maximum current capacity and causing the battery's voltage level to fall to the UVLO threshold. In some examples, a pre-UVLO threshold (i.e., a threshold higher than the UVLO threshold) may be used to modify the states of one or more modules to save power as the voltage of the battery approaches the UVLO threshold, but before the device must be fully powered off.

主权项

1. A method of an electronic device including a plurality of modules and a power supply, the method comprising:
obtaining a first characteristic of the power supply; comparing the first characteristic to a first threshold; receiving a first power request for a first module of the plurality of modules; receiving a second power request for a second module of the plurality of modules; assigning a first power budget to the first module based on the comparison of the first characteristic to the first threshold; assigning a second power budget to the second module based on the first power budget; and drawing power at the first module based on the first power budget, and at the second module based on the second power budget.