Abstract: An apparatus including a buck circuitry and logic circuitry. The buck circuitry charges a flying capacitor with a voltage in response to a device state being in a charging state and discharges the voltage from the flying capacitor in response to the device state being in a discharging state. The logic circuitry causes the buck circuitry to transition the device state in response to detecting voltage balance during a reference time period and causes the buck circuitry to repeat the device state occurring at the reference time period in response to detecting voltage imbalance during the reference time period.

Abstract: A switching regulator including a buck controller and control logic. The buck controller compares a reference output voltage with an output voltage to obtain a control voltage. The control logic outputs pulses to the switches. The pulses sequence the transitioning of the switches. The control logic inhibits one or more of the pulses from transitioning in response to a voltage difference existing between the control voltage and the reference output voltage.

Abstract: A switching regulator including buck circuitry and an output voltage loop. The buck circuitry decreases a voltage level of an input voltage in response to converting the input voltage to an output voltage. The output voltage loop performs a digital-to-analog conversion on an output voltage setpoint to convert the output voltage setpoint from a digital word to a reference output voltage. The output voltage loop compares the reference output voltage with the output voltage to obtain a control voltage.

Abstract: An integrated circuit chip includes a vlimiter controller, a capacitive buck controller, a multi-level buck controller and a switch controller. The vlimiter controller outputs vlimiter signals that cause the integrated circuit chip to perform as a voltage limiter. The capacitive buck controller outputs capacitive buck signals that cause the integrated circuit chip to perform as a capacitive buck converter. The multi-level buck controller outputs multi-level buck signals that cause the integrated circuit chip to perform as a multi-level buck converter. The switch controller selects between the vlimiter signals, the capacitive buck signals and the multi-level buck signals.

Abstract: The subject technology is directed to an apparatus for controlling voltage transition rates in electronic circuits. In an embodiment, the apparatus comprises an inverter, which comprises a first node and a second node. The inverter is configured to generate a first signal characterized by a voltage transition rate. The apparatus further comprises a first capacitor coupled between the first node and the second node. The first capacitor is characterized by a first capacitance. The apparatus further comprises a controller coupled to the inverter and the first capacitor. The controller is configured to control the voltage transition rate by adjusting the first capacitance.

Abstract: Aspects of the subject disclosure may include, for example, a power receiving unit having a wireless power receiver that receives a wireless power signal from a power transmitting unit. A rectifier circuit rectifies the wireless power signal to generate a rectified power signal in response thereto for charging a battery. A first wireless radio unit exchanges control data with a second wireless radio unit of the power transmitting unit via a wireless control channel, wherein the exchange of control data facilitates establishment of the wireless control channel, establishment of a charging session between the power receiving unit and the power transmitting unit, and control of the charging session between the power receiving unit and the power transmitting unit.

Abstract: Aspects of the subject disclosure may include, for example, a power receiving unit having a wireless power receiver that receives a wireless power signal from a power transmitting unit. A rectifier circuit rectifies the wireless power signal to generate a rectified power signal in response thereto for charging a battery. A first wireless radio unit exchanges control data with a second wireless radio unit of the power transmitting unit via a wireless control channel, wherein the exchange of control data facilitates establishment of the wireless control channel, establishment of a charging session between the power receiving unit and the power transmitting unit, and control of the charging session between the power receiving unit and the power transmitting unit.

Abstract: Aspects of the subject disclosure may include, for example, a power receiving unit having a wireless power receiver that receives a wireless power signal from a power transmitting unit. A rectifier circuit rectifies the wireless power signal to generate a rectified power signal in response thereto for charging a battery. A first wireless radio unit exchanges control data with a second wireless radio unit of the power transmitting unit via a wireless control channel, wherein the exchange of control data facilitates establishment of the wireless control channel, establishment of a charging session between the power receiving unit and the power transmitting unit, and control of the charging session between the power receiving unit and the power transmitting unit.

Abstract: Aspects of the subject disclosure may include, for example, a power receiving unit having a wireless power receiver that receives a wireless power signal from a power transmitting unit. A rectifier circuit rectifies the wireless power signal to generate a rectified power signal in response thereto for charging a battery. A first wireless radio unit exchanges control data with a second wireless radio unit of the power transmitting unit via a wireless control channel, wherein the exchange of control data facilitates establishment of the wireless control channel, establishment of a charging session between the power receiving unit and the power transmitting unit, and control of the charging session between the power receiving unit and the power transmitting unit.

Abstract: Aspects of the subject disclosure may include, for example, a power receiving unit having a wireless power receiver configured to receive a wireless power signal from a power transmitting unit. A rectifier includes a plurality of switching circuits configured to generate a rectified voltage from the wireless power signal, based on switch control signals that include a switch-on signal and a switch-off signal for corresponding ones of the plurality of switching circuits. A rectifier control circuit generates the switch control signals based on predicted switching delays. Other embodiments are disclosed.

Abstract: Aspects of the subject disclosure may include, for example, a power receiving unit having a wireless power receiver configured to receive a wireless power signal from a power transmitting unit. A rectifier includes a plurality of switching circuits configured to generate a rectified voltage from the wireless power signal, based on switch control signals that include a switch-on signal and a switch-off signal for corresponding ones of the plurality of switching circuits. A rectifier control circuit generates the switch control signals based on predicted switching delays. Other embodiments are disclosed.

Abstract: A method and apparatus is disclosed to charge a battery. A wall adapter may provide a power to a battery charger in a collapsed mode of operation. In the collapsed mode of operation, the wall adapter may provide the battery charger with a collapsed power. The battery charger may provide a charging current and/or voltage in a constant current charge mode of operation and/or a constant voltage charge mode of operation using the collapsed power. When operating in the constant current charge mode of operation, the battery charger provides the charging current and/or voltage having a constant current until the voltage of the battery is less than or substantially equal to a constant charge voltage. Alternatively, when operating in the constant voltage charge mode of operation, the battery provides the charging current and/or voltage having a constant voltage until the voltage of the battery is less than or substantially equal to a float voltage.

Abstract: A circuit includes a switching regulator that produces a first voltage supply output and that includes an operational supply input. The operational supply input may provide power for running the logic in the switching regulator. The circuit also includes a linear regulator that produces a second voltage supply output. A control circuit accepts the first voltage supply output and the second voltage supply output and includes a power output connected to the operational supply input. The control circuit is configured to pass the second voltage supply output to the power output until the first voltage supply output is established. After the first voltage supply is established, the control circuit instead passes the first voltage supply output to the power output through the control circuit. The first voltage supply output may also then provide power to the circuitry that would otherwise have been powered by the linear regulator.

Abstract: A power management unit accurately measures and controls charging current. The power management unit may be implemented more efficiently than prior designs, leading to cost savings in the implementation of the power management unit as well as in the implementation of the device that incorporates the power management unit. The power management unit incorporates a model of an external charge control device (e.g., a transistor) and uses that model in a way that allows the power management unit to eliminate external device pins and other circuitry.

Abstract: A circuit includes a switching regulator that produces a first voltage supply output and that includes an operational supply input. The operational supply input may provide power for running the logic in the switching regulator. The circuit also includes a linear regulator that produces a second voltage supply output. A control circuit accepts the first voltage supply output and the second voltage supply output and includes a power output connected to the operational supply input. The control circuit is configured to pass the second voltage supply output to the power output until the first voltage supply output is established. After the first voltage supply is established, the control circuit instead passes the first voltage supply output to the power output through the control circuit. The first voltage supply output may also then provide power to the circuitry that would otherwise have been powered by the linear regulator.

Abstract: A method and apparatus is disclosed to charge a battery. A wall adapter may provide a power to a battery charger in a collapsed mode of operation. In the collapsed mode of operation, the wall adapter may provide the battery charger with a collapsed power. The battery charger may provide a charging current and/or voltage in a constant current charge mode of operation and/or a constant voltage charge mode of operation using the collapsed power. When operating in the constant current charge mode of operation, the battery charger provides the charging current and/or voltage having a constant current until the voltage of the battery is less than or substantially equal to a constant charge voltage. Alternatively, when operating in the constant voltage charge mode of operation, the battery provides the charging current and/or voltage having a constant voltage until the voltage of the battery is less than or substantially equal to a float voltage.