Abstract: Presented herein are techniques for transcutaneously transferring power and data from an external component to an implantable component of an implantable medical device. In accordance with embodiments presented herein, the implantable component comprises an implantable resonant circuit, while the external component comprises an external resonant circuit. The external component also comprises external radio-frequency (RF) interface circuitry configured to drive the external resonant circuit at a first frequency in order to transfer power to the implantable resonant circuit, and to drive the external resonant circuit at a second frequency, which is different from the first frequency, in order to transfer data to the implantable resonant circuit.

Abstract: Presented herein are techniques for protecting an implantable component of a medical device from the buildup of excessive heat following a charging process. In one embodiment, the implantable component includes a resonant tank circuit that includes an implantable coil that receives power from the external charging device via an inductive link. The implantable component includes a rechargeable battery that is electrically connected to the resonant tank circuit and that can be recharged using the power received from the external charging device. A controller in the implantable component is configured to determine when charging of the rechargeable battery should be terminated and, in response, detune the resonant tank circuit in accordance with a predetermined pattern to signal to the external charging device that charging of the rechargeable battery should be terminated.

Abstract: Presented herein are techniques for protecting an implantable component of a medical device from the buildup of excessive heat following a charging process. In one embodiment, the implantable component includes a resonant tank circuit that includes an implantable coil that receives power from the external charging device via an inductive link. The implantable component includes a rechargeable battery that is electrically connected to the resonant tank circuit and that can be recharged using the power received from the external charging device. A controller in the implantable component is configured to determine when charging of the rechargeable battery should be terminated and, in response, detune the resonant tank circuit in accordance with a predetermined pattern to signal to the external charging device that charging of the rechargeable battery should be terminated.