Hello,
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I would like to ask, is it necessary to add D1 and D2 protection diodes to the external detection circuit of the DESAT pin of the UCC21750-Q1 chip? If necessary, can D1 be replaced with a voltage regulator tube? "Adjust resistor R1" or "add D4 voltage regulator tube" to adjust the desaturation trigger threshold, which one do you recommend more?