Thermal Performance of Class- FF Converter Used for Wireless Power Transfer in Retinal Implants

In wireless power transfer converters used for retinal implants, a sudden change in coupling coefficient of the inductive link results in delivering excessive transient power to the implant. Dissipation of this power increases the eye temperature, which can hurt the sensitive eye tissues. In this paper, thermal performance of the new class- FF converter used as a 50 m W /5 V wireless power transfer circuit with the frequency of 1 MHz in retinal implants is studied and compared with the conventional class-E converter in COMSOL environment.