Abstract: Systems and devices for power multiplexing are described. A device can include a first power input circuit including a first power driver having a first gate that is configured to receive power from a first power input channel and output power to a power output channel. The device includes a second power input circuit including a second power driver having a second gate that is configured to receive power from a second power input channel and output power to the power output channel. The device includes a charge pump connected to the power output channel that generates an output having a voltage greater than a voltage on the power output channel. The device includes a switching circuit connected to the output of the charge pump that is configured to selectively control the first and second power input circuits to output power to the power output channel.

Abstract: A wireless power transmitter is disclosed that comprises a coil, a first node electrically connected to a first side of the coil, a second node electrically connected to a second side of the coil, a plurality of transistors that are configured to drive the coil via the first and second nodes between a first voltage potential and a second voltage potential and a monitor circuit that is configured to determine the timing at which a first voltage of the first node and a second voltage of the second node cross a halfway point between the first voltage potential and the second voltage potential. The wireless power transmitter further comprises a feedback circuit that is configured to adjust a delay corresponding to at least one transistor of the plurality of transistors based at least in part on the first and second times.

Abstract: Systems and methods implementing an improved DVCS amplifier are described. The integrated circuit can include a controller. The integrated circuit can further include an amplifier configured to measure a common mode voltage across a capacitor of a switching converter. The integrated circuit can include a circuit configured to receive a differential input being provided to the amplifier. Based on the differential input, the circuit can further be configured to maintain the common mode voltage to regulate the amplifier within an operating range of the amplifier.

Abstract: A method for operating a battery charging circuit is generally described. The method comprises obtaining a fault condition value and determining that a fault condition is present. The method further comprises setting a freeze signal to a first value based on the determination that the fault condition is present and outputting the freeze signal to a loop control circuit that is configured to inhibit a correction of a battery input current based on the freeze signal. The method further comprises re-obtaining the fault condition value and determining that the fault condition is not present. The method further comprises setting the freeze signal to a second value based on the determination that the fault condition is not present and outputting the freeze signal to the loop control circuit. The loop control circuit is configured to enable a correction of the battery input current based on the freeze signal.

Abstract: Systems and devices for power multiplexing are described. A device can include a first power input circuit including a first power driver having a first gate that is configured to receive power from a first power input channel and output power to a power output channel. The device includes a second power input circuit including a second power driver having a second gate that is configured to receive power from a second power input channel and output power to the power output channel. The device includes a charge pump connected to the power output channel that generates an output having a voltage greater than a voltage on the power output channel. The device includes a switching circuit connected to the output of the charge pump that is configured to selectively control the first and second power input circuits to output power to the power output channel.

Abstract: Systems and methods for wireless power transfer systems are described. A controller can be coupled to a power rectifier configured to rectify alternating current power into direct current power. The power rectifier can include a first high side transistor, a second high side transistor, a first low side transistor, and a second low side transistor. The controller can be configured to selectively switch on one or more of the first high side transistor, the second high side transistor, the first low side transistor, and the second low side transistor to operate a wireless power receiver under one of a full bridge rectifier mode and a voltage doubler mode.

Abstract: Systems and methods for wireless power transfer systems are described. A controller can be coupled to a power rectifier configured to rectify alternating current power into direct current power. The power rectifier can include a first high side transistor, a second high side transistor, a first low side transistor, and a second low side transistor. The controller can be configured to selectively switch on one or more of the first high side transistor, the second high side transistor, the first low side transistor, and the second low side transistor to operate a wireless power receiver under one of a full bridge rectifier mode and a voltage doubler mode.

Abstract: Methods and apparatuses for controlling a rectified voltage outputted by a rectifier circuit is described. In response to an occurrence of an overvoltage condition, an apparatus can regulate a gate-source voltage of a low-side switching element of the rectifier circuit to control the rectified voltage. The apparatus can include an operational amplifier that can compare a reference voltage and with a scaled voltage measured at a node between the low-side switching element and a high-side switching element of the rectifier circuit. The operational amplifier can output a voltage to regulate a gate-source voltage of a low-side switching element. The apparatus can further include a current sensor configured to sense current flowing through the low-side switching element. A power dissipation of the low-side switching element can be controlled based on the current being sensed by the current sensor.

Abstract: Embodiments described herein provides a battery charging circuit that boosts an input current and feeds the boosted input current to a battery for fast charging. Specifically, the battery charging circuit includes a low dropout regulator (LDO) for providing a voltage, a switch mode charger, coupled between the LDO and a battery, and a capacitor divider, coupled between the LDO and the battery, in parallel to the switch mode charger, for dividing the voltage outputted from the LDO by a factor.

Abstract: Embodiments described herein provides a battery charging circuit that boosts an input current and feeds the boosted input current to a battery for fast charging. Specifically, the battery charging circuit includes a low dropout regulator (LDO) for providing a voltage, a switch mode charger, coupled between the LDO and a battery, and a capacitor divider, coupled between the LDO and the battery, in parallel to the switch mode charger, for dividing the voltage outputted from the LDO by a factor.