This paper introduces a capacitor assembly designed using multilayer ceramic capacitors (MLCCs) mounted on a printed circuit board (PCB), for power electronics applications operating at voltages of up to 500 V. The design creates a low impedance capacitor network that minimizes both equivalent series resistance and equivalent series inductance. This leads to improvements for applications that require capacitors with low voltage ripple and low impedance, such as DC-link commutation capacitors, flying capacitor circuits, and output filters. The capacitor board is built by paralleling standard MLCCs, using a layout that ensures uniform current distribution and reduces parasitics. Compared to standard film capacitors, a reduction in parasitic impedance by a factor of more than 10 is achieved while maintaining a compact form factor. Simulation results and prototype measurements validate the design approach and demonstrate its feasibility.
