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LM7480-Q1: LM7480-Q1 output mosfet driving issue

Part Number: LM7480-Q1
Other Parts Discussed in Thread: TIDA-020040

We design a schematic which has 15A over-current protection according to TIDA-020040 document. Our power supply capable of giving 20A but when we short-circuit the output, we measure only 1 Amp and the Mosfet Q5 gets very hot.