Increasing the durability of electronic components in the inductive power supply system of implantable medical devices

The paper describes the problem of selecting electronic components in the inductive power supply system of implantable medical devices. It has been established that the use of components with low equivalent series resistance, as well as the use of capacitors with a temperature coefficient of capacitance of the NP0 type, allows reducing the heating of the inductive power transfer system with a class E power amplifier by more than 40%. A comparison of protective (conformal) coatings for reducing the heating of electronic components and increasing their resistance to the aggressive environment of the human body has been carried out. An experimental sample of the inductive power transfer system to implantable medical devices with a urethane conformal coating and a sealed polytetrafluoroethylene case has been developed and successfully tested on a laboratory animal.