Abstract: A method is provided for operating a wireless charger having a multi-switch inverter which supplies an output PWM signal to a resonant circuit in response to switching control signals, including a first set of continuous excitation phase switching control signals (which generate the output PWM signal to have alternating positive and negative pulses having a first pulse frequency) and a second set of free resonance signal sensing phase switching control signals (which enable the resonant tank circuit to generate a resonant decaying output voltage signal in the presence of a foreign object that is located near the wireless charger), where each continuous excitation phase switching control signal includes a plurality of positive or negative excitation pulses having the first pulse frequency, and where one or more quality factor parameters of the wireless charger are measured based on one or more electrical parameters of the resonant decaying output voltage signal.

Abstract: A method is provided for operating a wireless charger having a multi-switch inverter which supplies an output PWM signal to a resonant circuit in response to switching control signals, including a first set of continuous excitation phase switching control signals (which generate the output PWM signal to have alternating positive and negative pulses having a first pulse frequency) and a second set of free resonance signal sensing phase switching control signals (which enable the resonant tank circuit to generate a resonant decaying output voltage signal in the presence of a foreign object that is located near the wireless charger), where each continuous excitation phase switching control signal includes a plurality of positive or negative excitation pulses having the first pulse frequency, and where one or more quality factor parameters of the wireless charger are measured based on one or more electrical parameters of the resonant decaying output voltage signal.

Abstract: A controller for a power converter includes a generator module which generates a sequence of pulses each having a width defined by a rise moment and fall moment stored in respective RM and FM registers. The sequence of pulses have a repetition rate that is modulated by a repetition period value stored in a RP register. A memory of the controller has tables of rise moment values, fall moment values and repetition period values configured to be written into the RM, FM and RP registers respectively. A direct memory access (DMA) module of the controller is configured to write rise moment, fall moment, and repetition period values from the respective memory table into the RM, FM, and RP registers respectively, in response to a DMA trigger. A core coupled to the DMA module is configured to write the rise moment, fall moment, and repetition period values into the memory tables.

Abstract: A magnetic cover is disclosed which is configured to be positioned on a wireless charging transmitter. The magnetic cover comprises: a magnetic ring positioned on the magnetic cover, wherein when the magnetic cover is positioned on a wireless charging transmitter, the magnetic ring encompasses a center planar charging coil of the wireless charging transmitter; and a plurality of passive identification circuits, each identification circuit having a respective resonance frequency. When the magnetic cover is positioned over a wireless charging transmitter, the plurality of passive identification circuits overlaps with a side planar charging coil of the wireless charging transmitter and the side planar charging coil overlaps with center planar charging coil. The disclosed magnetic cover is facilitates detection by the wireless charging transmitter and wireless charging in accordance with magnetic power profile (MPP) charging.

Abstract: A controller for a power converter includes a generator module configured to generate a sequence of pulses each having a width defined by a rise moment, R, and fall moment, F, stored in respective RM and FM registers. The sequence of pulses have a repetition rate, T, that is modulated by a repetition period, RP, value stored in a RP register. A memory of the controller has tables of R values, F values and RP values configured to be written into the generator module RM, FM and TM registers respectively. A direct memory access (DMA) module of the controller is configured to write R, F and RP values from the respective memory table into the RM, FM, and TM registers respectively, in response to a DMA trigger. A core coupled to the DMA module is configured to write the R, F and RP values into the memory table.

Abstract: Aspects of the subject disclosure may include, for example, detecting placement of a receiver coil of a device upon a transmitter coil of a wireless charger, identifying a transmitter coil type of the transmitter coil, identifying a receiving coil type associated with the receiver coil of the device, comparing the transmitter coil type to the receiver coil type, generating a message to move the device to a different position of the wireless charger responsive to detecting a mismatch between the receiving coil type of the device and the transmitting coil type of the wireless charger. Other embodiments are disclosed.

Abstract: A controller for generating a sequence of pulse is disclosed. The controller includes a plurality of pulse width modulation (PWM) modules. Each PWM Module configured to generate a first sequence of pulses and a second sequence of pulses each having a width that is modulated by a PWM value stored in a PWM register of the PWM module. Each PWM module includes two outputs. The first sequence of pulses is outputted on the first output and the second sequence of pulses is outputted on the second output. The controller also includes a memory having a plurality of memory tables and a plurality of direct memory access (DMA) modules. Each memory table configured to store PWM values to be written into the PWM register and each DMA module is coupled to a respective PWM module in the plurality of PWM modules and to a respective memory table in the plurality of memory tables and configured to write a PWM value from the memory table into the PWM register in response to a DMA trigger.

Abstract: One example discloses an inductive power transmit device, including: a power controller configured to be coupled to a set of primary inductive coils; wherein the power controller is configured to supply power to a first subset of the primary coils; wherein the first subset of primary coils are configured to inductively transfer power to a set of secondary inductive coils; wherein the power controller is configured to supply the power to a second subset of the primary coils in response to a threshold movement of the secondary inductive coils with respect to the primary inductive coils; and wherein the power controller is configured to determine the movement based on the power supplied to the first subset of primary coils, and a ratio of power supplied to one primary coil in the first subset of primary coils as compared to power supplied to all coils in the first subset of coils.

Abstract: A controller for generating a sequence of pulse is disclosed. The controller includes a plurality of pulse width modulation (PWM) modules. Each PWM Module configured to generate a first sequence of pulses and a second sequence of pulses each having a width that is modulated by a PWM value stored in a PWM register of the PWM module. Each PWM module includes two outputs. The first sequence of pulses is outputted on the first output and the second sequence of pulses is outputted on the second output. The controller also includes a memory having a plurality of memory tables and a plurality of direct memory access (DMA) modules. Each memory table configured to store PWM values to be written into the PWM register and each DMA module is coupled to a respective PWM module in the plurality of PWM modules and to a respective memory table in the plurality of memory tables and configured to write a PWM value from the memory table into the PWM register in response to a DMA trigger.

Abstract: A respective first signal is applied to a first terminal of each of one or more litz coils and each of one or more printed circuit board (PCB) coils. A respective second signal is received from a second terminal associated with each of the one or more litz coils and the one or more PCB coils. The respective second signal is based on the respective first signal applied to the first terminal of each of one or more litz coils and each of one or more printed circuit board (PCB) coils. A coil is selected from the one or more litz coils and the one or more PCB coils where the selected coil is based on the respective second signal from the second terminal associated with each of the one or more litz coils and the one or more PCB coils. The selected coil is caused to wirelessly transfer the power to an electronic device.

Abstract: A respective first signal is applied to a first terminal of each of one or more litz coils and each of one or more printed circuit board (PCB) coils. A respective second signal is received from a second terminal associated with each of the one or more litz coils and the one or more PCB coils. The respective second signal is based on the respective first signal applied to the first terminal of each of one or more litz coils and each of one or more PCB coils. A coil is selected from the one or more litz coils and the one or more PCB coils where the selected coil is based on the respective second signal from the second terminal associated with each of the one or more litz coils and the one or more PCB coils to wirelessly transfer the power to an electronic device.

Abstract: Embodiments of a method and device are disclosed. In an embodiment a controller is disclosed. In an embodiment, the controller includes a pulse width modulation (PWM) module configured to generate a sequence of pulses each having a width that is modulated by a PWM value stored in a register of the PWM module, a memory having a table of PWM values configured to be written into the PWM module register, a direct memory access (DMA) module coupled to the PWM module and to the memory table and configured to write a PWM value from the memory table into the PWM register in response to a DMA trigger, and a core coupled to the DMA module and configured to write the PWM values into the memory table.

Abstract: One example discloses an inductive power transmit device, including: a power controller configured to be coupled to a set of primary inductive coils; wherein the power controller is configured to supply power to a first subset of the primary coils; wherein the first subset of primary coils are configured to inductively transfer power to a set of secondary inductive coils; wherein the power controller is configured to supply the power to a second subset of the primary coils in response to a threshold movement of the secondary inductive coils with respect to the primary inductive coils; and wherein the power controller is configured to determine the movement based on the power supplied to the first subset of primary coils, and a ratio of power supplied to one primary coil in the first subset of primary coils as compared to power supplied to all coils in the first subset of coils.