Abstract: A neuromodulation therapy is delivered via at least one electrode implanted subcutaneously and superficially to a fascia layer superficial to a nerve of a patient. In one example, an implantable medical device is deployed along a superficial surface of a deep fascia tissue layer superficial to a nerve of a patient. Electrical stimulation energy is delivered to the nerve through the deep fascia tissue layer via implantable medical device electrodes.

Abstract: A neuromodulation therapy is delivered via at least one electrode implanted subcutaneously and superficially to a fascia layer superficial to a nerve of a patient. In one example, an implantable medical device is deployed along a superficial surface of a deep fascia tissue layer superficial to a nerve of a patient. Electrical stimulation energy is delivered to the nerve through the deep fascia tissue layer via implantable medical device electrodes.

Abstract: An interleaved switched mode power supply and control method therefor are disclosed. The interleaved switched mode power supply includes a first switched mode power supply; a second switched mode power supply; and a controller. The controller controls the first and second switched mode power supplies so that the controller and the first and second switched mode power supplies form an interleaved switched mode power supply with power factor correction. The controller modulates a switching frequency of each of the first and second switched mode power supplies such that the switching frequency varies based upon ripple current cancellation between the ripple current of the first switched mode power supply and the ripple current of the second switched mode power supply.

Abstract: A charging system includes an AC-DC converter for connecting to AC mains; a DC-link connected to the AC-DC converter output; and a DC-DC converter having an input coupled to the AC-DC converter output, a control input, and an output. The DC-DC converter includes drive circuitry for controlling the DC-DC converter. A controller has a feedforward input for receiving a signal corresponding to a voltage across the DC-link, a feedback input for receiving a signal corresponding to an output current provided by the DC-DC converter, and an output coupled to the control input of the DC-DC converter. The controller generates a control signal which controls the drive circuitry based upon a positive half cycle and a negative half cycle of ripple voltage at the DC-link, and a ripple current amplitude at the DC-DC converter output during at least one of the positive half cycle or the negative half cycle.

Abstract: A power factor correction (PFC) circuit is provided. The PFC circuit includes an input for receiving alternating current and a converter for converting the received alternating current to a direct current. The PFC circuit also includes a direct current link that includes at least one capacitor. Additionally, the PFC circuit includes a voltage regulator control loop operating in burst mode under light load conditions by switching between an ON-state and an OFF-state periodically. The PFC circuit also includes a controller preloading the voltage regulator control loop with an initial value corresponding to the circuit current load under light conditions, when the voltage regulator control loop is transitioning to an ON-state of the burst mode. The initial value is based on the rate of change of the voltage at the direct current link and the capacitance of the capacitor of the direct current link.

Abstract: A charging system includes an AC-DC converter for connecting to AC mains; a DC-link connected to the AC-DC converter output; and a DC-DC converter having an input coupled to the AC-DC converter output, a control input, and an output. The DC-DC converter includes drive circuitry for controlling the DC-DC converter. A controller has a feedforward input for receiving a signal corresponding to a voltage across the DC-link, a feedback input for receiving a signal corresponding to an output current provided by the DC-DC converter, and an output coupled to the control input of the DC-DC converter. The controller generates a control signal which controls the drive circuitry based upon a positive half cycle and a negative half cycle of ripple voltage at the DC-link, and a ripple current amplitude at the DC-DC converter output during at least one of the positive half cycle or the negative half cycle.

Abstract: An interleaved switched mode power supply and control method therefor are disclosed. The interleaved switched mode power supply includes a first switched mode power supply; a second switched mode power supply; and a controller. The controller controls the first and second switched mode power supplies so that the controller and the first and second switched mode power supplies form an interleaved switched mode power supply with power factor correction. The controller modulates a switching frequency of each of the first and second switched mode power supplies such that the switching frequency varies based upon ripple current cancellation between the ripple current of the first switched mode power supply and the ripple current of the second switched mode power supply.