TIME-DOMAIN MULTIPLEXING OF POWER AND DATA

摘要

Circuits, methods, and apparatus that may allow an electronic device to control a power adapter. One example may provide an electronic system where an electronic device may control a power adapter through a communication channel. Data transferred in the communication channel may include the temperature of the power adapter, the charging capability of the adapter, and other types of data. In one example, power and data may share the same two wires, and the power and data may be time-division multiplexed. That is, the two wires may convey power and data at different times. Another example may include circuitry to detect a connection between the electronic device and the power adapter. Once a connection is detected, power may be transferred from the power adapter to the electronic device. This power transfer may be interrupted on occasion to transfer data between the power adapter to the electronic device.

主权项

1. A method of operating an electronic device, the method comprising:
detecting a connection of a power adapter at a receptacle of the electronic device; drawing power from the power adapter at the electronic device receptacle; determining that power would be more efficiently provided by a battery internal to the electronic device; instructing the power adapter to not provide power to the electronic device receptacle; and drawing power from the battery.