A high current, in-bore, switched capacitor voltage converter with low EMI and high efficiency.

Motivation: Due the noise emission of switch mode power supplies, linear regulators are often present in electronics in and around the MR bore, with the related thermal challenges. Goal(s): In this work we present a switched capacitor converter witch is capable of providing high output currents without emitting noise in the MR RF band. Approach: The goal was achieved by controlling the slew rate of the gate source voltage of the switching GaN FETs. Results: High efficiency, low output ripple and no unexpected transient behavior could be measured on the bench. Impact: The presented 10A switched capacitor converter can provide efficiently power to electronics without emitting RF noise around the MR RF band. Enlarging the integration possibilities of high density electronics in and around the MR bore.