This article deals with the monolithic integration in silicon of a multiphase static power converter (dc/ac or ac/dc) for medium power applications, from few kilowatts to few tens of kilowatts with power devices' blocking capability in the range of 600-1200 V. This article presents an original three-chip integration approach that combines both monolithic integration in silicon and printed circuit board (PCB) packaging process and takes advantage of both silicon-level technology and PCB-level technology within a limited and well-mastered complexity. The converter is integrated within only three new multiterminal power chips, which are then judiciously packaged on a PCB so as to minimize the switching cell stray inductance and the impact of voltage variations (dv/dt) across the common-mode stray capacitance of the assembly. The static and the dynamic operating modes of the proposed multiterminal power chips were validated using 2-D-Sentaurus TCAD simulations. The realized chips were packaged on a PCB to realize both classical and three-chip-based H-bridge inverters. First characterization results validate the electrical operating modes of the H-bridge inverter realized according to the three-chip approach.