Apple Inc. (Cupertino, CA)

An electronic system can include the charging system as well as charging systems. The system that is charged can comprise an electric charger as well as a battery which is designed to be charged. A charging system can comprise an energy converter that provides electricity to the charger as well as a controller for managing the power converter. The charger could also be configured to receive feedback data, which may include several voltages. Furthermore, the controller may be configured to calculate the value of compensation for output voltage to the power converter based on the feedback data. The compensation value may be utilized to alter the output voltage for the power converter. The compensation value and output voltage could be set to ensure a preselected headroom between a battery charging voltage target of the charger as well as a voltage that is supplied to the charger.

The modern consumer uses many electronic gadgets powered by batteries. It is desirable to charge the batteries as efficiently and quick as you can. In some embodiments, such efficiencyrequirements may be heightened. It’s now standard for users to recharge their batteries with other battery-powered devices. Wireless earphones, referred to as “ear buds” are recharged using a storage device that contains a battery. It is also possible to charge tablets and smartphones via laptops, or use a portable powerbank to charge them. These applications are limited in regards to the amount of charge which can be charged. The effectiveness charging the device could increase the number of charges it can receive and extend the life of the device.

In certain embodiments charging a battery may include providing a constant current until the battery is at the state of charge. Then, offering a constant voltage until the battery has reached an additional state of charge. The voltage needed/supplied for the continuous current phase increases as battery charges increase. To the extent that the voltage supplied to the charger is significantly more than the required batterycharging voltage, significant inefficiencies may be introduced. However, providing the voltage that is not sufficient to fulfill the battery’s charging profile could result in longer than required charging times. Thus, what is needed in the art are systems andmethods for maintaining a voltage supplied to a battery charger of a portable electronic device at a level sufficiently above the required battery target voltage to maintain the desired rate of charging, but not so high as to introduce the aforementionedinefficiencies.

A computer system may include an charged system as well as charging systems. The system charged may include at least one charger and at least one battery designed to charge by at-least one charger. The charger may be set to draw the power of an charging device. The charging system could comprise an energy converter that is configured to supply power to the at least one charger of the system that is charged and a controller designed to control the power converter. The controller could be configured to receive feedback from the charging system and the feedback information could include the one or more voltages that are associated with the charged system. As a function the feedback information, the controller is able to determine the voltage of the output compensation value of the power converter. The controller may be still further set to control the output voltage for the power converter in proportion of the compensation value which means that the compensation value as well as the output voltage are set to ensure a specified headroom in between the battery charging voltage target of the charger and a voltage that is supplied to the charger.

The system that is charged may comprise several batteries and a plurality of chargers. One or more voltages may be included in the charged system. These voltages could comprise an input voltage for at least one charger, and an output voltage for at most one charger. A charger or a low dropout regulator, or at most one switch, could be present in the charged system. They will be connected between the input of at least 1 charger as well as the power connection of at least 1 charged system. Wireless headphones can be added to the system that is charged.

The charging system could also include one or more switches coupled to an output from the power converter and one or more power contacts on the charging system. A power source may be integrated into the charging system to supply power to the power converter. The power source can be linked to the battery within the charging system or connected to an external source of power via an electrical or wireless connection.

A method of supplying energy to a battery charger of a charged system, for charging the battery of the charged system, can include receiving, from a controller for a charging system, feedback information from the charging system and the feedback information comprising one or more voltages of the system that is charged. The method could also involve determining, through the controller of the charging system an output voltage-related compensation value for a power converter of the charged system as a consequence of the feedback information, the power converter being configured to provide power to the battery charger. The method may also involve setting, by the controller, an output voltage for the power converter in the direction of the compensation value,wherein the values for compensation and output are selected to maintain a preselected headroom between a battery charging voltage that is set by the charger and a voltage supplied to the charger.

The charged system may include multiple batteries as well as several chargers. The voltages that are part of the charging system are at least an input voltage for at least one charger as well as an output voltage of at the very least one charger. The controller of the charging system determines of the charging system an output voltage compensation value for the power converter in the system that is charged as a function of the feedback information may be based on determining if data received from the charging system is valid. In determining, by the controller of the charging system an output voltage compensation value for the power converter of the charged system in response to feedback information includes the determination of whether data received from the charged systemis valid. It could also involve setting the charging system’s status to one of a number of states that respond to the feedback information. It is possible to select from the various predetermined compensation levels to determine the compensation value. The predeterminedcompensation values include a plurality of positive values, at least one negative value, and a zero value. A charging case could be part of the charged system.

An electronic system could include at least one battery, at least one charger configured to charge the at least one battery as well as a power conversion configured to deliver electricity to at most one battery. The electronic system can further includemeans for regulating an output voltage of the power converter in order that the output voltage maintains a preselected headroom above a charging target voltage of at least one charger.

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