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LT4320 three phase rectifier circuit (Demo board DC2465A). What are the discrete diodes and resistors being used for?

Category: Hardware
Product Number: DC2465A, LT4320

The LT4320 ideal diode controller can be used in a three phase application based on demo board DC2465A. I see that there is a very unique arrangement of discrete switching diodes and 100k ohm resistors to make this function correctly. I am very interested to learn what these discrete parts are doing and how I can visualize their importance. I am having trouble understanding what their role is in this particular topology.