A 5.75mW Fully-Integrated Galvanic Isolator for Gate Drivers with Asynchronous 66.7/66.7 Mb/s Full-Duplex Communication

This work presents a low power fully-integrated galvanic isolator for gate drivers featuring asynchronous full-duplex communication. The proposed design uses ASK and LSK modulation schemes to achieve symmetric $66.7 / 66.7 \mathrm{Mb} / \mathrm{s}$ throughput, using a compact $2.2 \mathrm{~mm}^{2}$ chip area. Full-duplex communication is ensured in a completely asynchronous scenario, enabling event-driven bidirectional data transfer through gate drivers. The prototype fabricated in a $0.13 \mu \mathrm{~m}$ HV CMOS technology consumes 5.75 mW from the 1.5 V supply. The propagation delay at the maximum data rate is below 20 ns.