Device with integrated wireless power receiver configured to make a charging determination based on a level of battery life and charging efficiency

摘要

A device includes an integrated power receive circuit, a battery charger, a battery, a processing module, one or more input/output modules, and one or more circuit modules. The integrated power receive circuit is operable to generate a DC voltage from a received magnetic field in accordance with a control signal. The battery charger is operable to convert the DC voltage into a battery charge voltage. The battery is coupled to the battery charger in a first mode and is coupled to supply power in a second mode. The processing module is operable to: generate the control signal based on desired electromagnetic properties of at least one of the received magnetic field and the integrated power receive circuit; process outbound data to produce processed outbound data; and process inbound data to produce processed inbound data.

主权项

1. An integrated circuit (IC) for using a device, the IC comprises:
a processing module configured to:
generate a control signal based on desired electromagnetic properties of a received magnetic field and an integrated power receive circuit;provide the control signal to the integrated power receive circuit, wherein the control signal serves to tune the integrated power receive circuit;determine a level of a battery that includes an amount of battery life left;determine a charging efficiency for the received magnetic field;analyze the determined level of the battery and the determined charging efficiency to make a charging determination, the charging determination based, at least in part, on a comparison of the determined level of the battery and the determined charging efficiency on a sliding scale basis, wherein for a given determined level of the battery a minimum pre-defined charging efficiency is indicated by the sliding scale basis, the value of the minimum pre-defined charging efficiency generally decreasing as the value of the given determined level of the battery decreases, and wherein the charging determination indicates that the battery is to be charged when the determined charging efficiency at least meets the minimum pre-defined charging efficiency corresponding to the determined level of the battery;generate a battery charger control signal based on the charging determination, wherein the battery charger control signal is configured to cause charging of the battery in a first mode and decoupling of the battery from a battery charger in a second mode; andprovide the battery charger control signal to the battery charger to effect the first mode or the second mode.