Abstract: Systems, methods, devices and non-transitory, computer-readable storage mediums are disclosed for identifying, by a processor of a wireless device that is coupled with a charging case, an enable command received from the charging case; and transmitting, by the processor based on the enable command, an advertisement signal that includes information related to an identification of the wireless device.

Abstract: An electronic device includes a housing coupled to a display window, a battery and a plurality of inductive charging transmit coils coupled to the battery. The plurality of inductive charging coils are positioned within the enclosure to generate an inductive charging region that extends through the display window and across at least a portion of an exterior of the display window. Sensing circuitry is configured to sense a position of a stylus at the display window and a processor is configured to selectively engage and disengage one or more of the plurality of inductive charging transmit coils based on the sensed position of the stylus. The stylus receives power when it is positioned within the inductive charging window.

Abstract: Systems, methods, devices and non-transitory, computer-readable storage mediums are disclosed for identifying, by a processor of a wireless device that is coupled with a charging case, an enable command received from the charging case; and transmitting, by the processor based on the enable command, an advertisement signal that includes information related to an identification of the wireless device.

Abstract: An electronic device includes a housing coupled to a display window, a battery and a plurality of inductive charging transmit coils coupled to the battery. The plurality of inductive charging coils are positioned within the enclosure to generate an inductive charging region that extends through the display window and across at least a portion of an exterior of the display window. Sensing circuitry is configured to sense a position of a stylus at the display window and a processor is configured to selectively engage and disengage one or more of the plurality of inductive charging transmit coils based on the sensed position of the stylus. The stylus receives power when it is positioned within the inductive charging window.

Abstract: An electronic device has an I/O port, a bus connector and a transistor that is connected between the I/O port and a communications contact of the bus connector. A control circuit is connected to the transistor to maintain a gate voltage of the transistor independent of power supply voltage on a power supply contact of the connector. Other embodiments are also described and claimed.

Abstract: An electronic device has an I/O port, a bus connector and a transistor that is connected between the I/O port and a communications contact of the bus connector. A control circuit is connected to the transistor to maintain a gate voltage of the transistor independent of power supply voltage on a power supply contact of the connector. Other embodiments are also described and claimed.

Abstract: A method for balancing an electrical parameter (e.g, a current or a voltage) between phases in a multi-phase interleaved circuit includes sensing the electrical parameter, demultiplexing the electrical parameter in accordance with a phase-select signal, sampling the demultiplexed components into a plurality of digital signals, generating an error signal based on a difference between the digital signals, and modulating the phase-select signal, as applied to the phases, in accordance with the error signal.

Abstract: A method for balancing an electrical parameter (e.g, a current or a voltage) between phases in a multi-phase interleaved circuit includes sensing the electrical parameter, demultiplexing the electrical parameter in accordance with a phase-select signal, sampling the demultiplexed components into a plurality of digital signals, generating an error signal based on a difference between the digital signals, and modulating the phase-select signal, as applied to the phases, in accordance with the error signal.

Abstract: A driving circuit for a half bridge utilizing bidirectional semiconductor switches in accordance with an embodiment of the present application includes a high side driver operable to control a high side bidirectional semiconductor switch, wherein the high side driver provides a negative bias voltage to the bidirectional semiconductor switch to turn the high side bidirectional semiconductor switch OFF. A low side driver may be operable to control a low side bidirectional semiconductor switch. An external voltage source with a negative terminal of the voltage source connected to the high side driver may be provided. A high side driving switch may be positioned between the negative terminal of the voltage source and the high side driver and operable to connect the high side driver to the negative terminal of the voltage source when the low side driver turns the low side bidirectional semiconductor switch ON.

Abstract: A resonant converter including a primary side switching stage having high- and low-side switches series connected at a switching node and controlled by a primary side controller; a transformer having a primary coil and a secondary coil, the secondary coil having at least one pair of portions series connected at a node, a resonant tank formed by series connecting the primary coil to the switching node with a first inductor and a first capacitor; at least one pair of first and second secondary side switches connected to the at least one pair of portions, respectively, the first and second secondary side switches of each pair being used for synchronous rectification; and a secondary side controller to control and drive the first and second secondary side switches of each pair by sensing voltage across each secondary side switch and determining a turn ON and turn OFF transition for the first and second secondary side switches in close proximity to a point in time when there is zero current through the secondary s

Abstract: A driving circuit for a half bridge utilizing bidirectional semiconductor switches in accordance with an embodiment of the present application includes a high side driver operable to control a high side bidirectional semiconductor switch, wherein the high side driver provides a negative bias voltage to the bidirectional semiconductor switch to turn the high side bidirectional semiconductor switch OFF. A low side driver may be operable to control a low side bidirectional semiconductor switch. An external voltage source with a negative terminal of the voltage source connected to the high side driver may be provided. A high side driving switch may be positioned between the negative terminal of the voltage source and the high side driver and operable to connect the high side driver to the negative terminal of the voltage source when the low side driver turns the low side bidirectional semiconductor switch ON.

Abstract: A driving circuit for a half bridge utilizing bidirectional semiconductor switches in accordance with an embodiment of the present application includes a high side driver operable to control a high side bidirectional semiconductor switch, wherein the high side driver provides a negative bias voltage to the bidirectional semiconductor switch to turn the high side bidirectional semiconductor switch OFF. A low side driver may be operable to control a low side bidirectional semiconductor switch. An external voltage source with a negative terminal of the voltage source connected to the high side driver may be provided. A high side driving switch may be positioned between the negative terminal of the voltage source and the high side driver and operable to connect the high side driver to the negative terminal of the voltage source when the low side driver turns the low side bidirectional semiconductor switch ON.

Abstract: A one cycle control power factor correction control circuit in accordance with an embodiment of the present application includes a first input operable to receive a signal indicative of an input voltage to the voltage converter, a second input operable to receive a signal indicative of an inductor current in an inductor of the voltage converter and an amplifier operable to amplify the signal indicative of the inductor current, wherein a gain of the amplifier is based on the signal indicative of the input voltage.

Abstract: A controller for controlling a controlled switching device functioning as a synchronous rectifier of alternating current, the controller comprising a control circuit for sensing the direction of current through the controlled switching device, the controlled switching device comprising a MOSFET having a conduction channel and a parasitic body diode and having two main current carrying terminals and a control terminal, the control circuit generating a control signal provided to the control terminal to turn on the controlled switching device approximately when current begins to flow in a first direction through the controlled switching device and turn off the controlled switching device approximately when current begins to flow in a second opposite direction through the controlled switching device, further wherein the control circuit for sensing the direction of current through the controlled switching device main current carrying terminals comprises a sensing circuit coupled across the controlled switching dev

Abstract: A resonant converter including a primary side switching stage having high- and low-side switches series connected at a switching node and controlled by a primary side controller; a transformer having a primary coil and a secondary coil, the secondary coil having at least one pair of portions series connected at a node, a resonant tank formed by series connecting the primary coil to the switching node with a first inductor and a first capacitor; at least one pair of first and second secondary side switches connected to the at least one pair of portions, respectively, the first and second secondary side switches of each pair being used for synchronous rectification; and a secondary side controller to control and drive the first and second secondary side switches of each pair by sensing voltage across each secondary side switch and determining a turn ON and turn OFF transition for the first and second secondary side switches in close proximity to a point in time when there is zero current through the secondary s

Abstract: A controller for controlling a controlled switching device functioning as a synchronous rectifier of alternating current, the controller comprising a control circuit for sensing the direction of current through the controlled switching device, the controlled switching device comprising a MOSFET having a conduction channel and a parasitic body diode and having two main current carrying terminals and a control terminal, the control circuit generating a control signal provided to the control terminal to turn on the controlled switching device approximately when current begins to flow in a first direction through the controlled switching device and turn off the controlled switching device approximately when current begins to flow in a second opposite direction through the controlled switching device, further wherein the control circuit for sensing the direction of current through the controlled switching device main current carrying terminals comprises a sensing circuit coupled across the controlled switching dev

Abstract: An integrated synchronous rectifier package comprising a controlled switching device having two main current carrying terminals and a control terminal, a control circuit for sensing the direction of current through the controlled switching device main current carrying terminals and for generating a control signal provided to the control terminal to turn on the controlled switching device when current flows in a first direction through the controlled switching device and to turn off the controlled switching device when current flows in a second opposite direction through the controlled switching device, the control circuit and controlled switching device being contained within a single package having no more than four external electrical connections.

Abstract: Disclosed is a method of controlling a High Electron Mobility Transistor (HEMT) through a cascode circuit, the cascode circuit including first and second switches, a capacitor connected to a source of the first switch, a source of the HEMT being connected to the drain of the first switch, and a controller for controlling the first and second switches. The method is achieved by defining state A, where the first switch is controlled to be OFF resulting in the HEMT being OFF and the second switch is controlled to be ON allowing the capacitor to be charged and stabilizing the drain voltage of the HEMT at around the HEMT gate threshold voltage. The method further defines state B, where the first switch is controlled to be ON resulting in the HEMT being ON and the second switch is controlled to be OFF almost all the time, thereby preserving the charge stored in the capacitor.

Abstract: A boost converter in which the conventional boost diode is replaced by a bidirectional normally conducting semiconductor switch. The circuit may be implemented so the bidirectional switch is self-driven by connecting a low voltage Schottky diode between a first gate-source terminal pair. An inrush current protection function may be provided by utilizing a second gate-source terminal pair to turn the switch on and off independent of the self-driven operation in response to predetermined excessive load current conditions. The inrush current protection function is implemented by use of a second Schottky diode connected between the second gate and source terminals, and an RC circuit connecting the second gate terminal to the return rail for the converter power output transistor with an externally controlled switch connected to the RC circuit to control the bias according to the load current.

Abstract: A high voltage rectifier device exhibiting low forward resistance and fast switching time formed of a high voltage structure connected in a cascode configuration with a low voltage structure. The high voltage structure is a bidirectional normally on semiconductor switch have two pairs of gate and source terminals which shuts off if either of the gate terminals is reverse biased. The low voltage structure is a diode, preferably a Schottky or barrier diode. The device is advantageously formed as an integrated circuit. With one of the terminal pairs of the switch clamped to zero volts, the device behaves as a diode, or the second terminal pair can be employed to provide the functions of a three terminal controlled rectifier. Among other possible applications are integrated circuits using four of the devices as a bridge rectifier, and as an anti-parallel diode for connection with an IGBT.