Our engineers have finalized the electric model of power supply for the Plasma Ion Camera (PICAM) of ESAs BepiColombo mission. The mission was launched to Mercury in 2018. The PICAM is an ion mass spectrometer working as a full-sky camera of charged particles. It is used to study the sequence of processes by which the neutral particles coming from the surface eventually get ionized, and travel through the environment of Mercury. The PICAM results the energy- and angular distribution of low-energy ions on the planet.