Analog Workshop 2023

A 400V Power Management IC for GaN-Based Photovoltaic Inverters with High dV/dt Edges

A power management IC for 400V GaN photovoltaic inverters is presented. To withstand the high dv/dt edges of more than 100V/ns resulting from the GaN switching, each switch has independent sensing and a dedicated control loop. In order to achieve high common-mode transient immunity (CMTI) the main control loop transfers the peak current set value via an 8-bit high voltage interface to the 400V high-side domain. Besides CMTI this also reduces the complexity of the external control. The IC is fabricated in a 180nm CMOS SOI technology.