Pin description: 1.Temperature 2.Undervoltage/high voltage buzzer 3.VCC+12V(High and low pressure sampling feet) 4.Fan control 5.VFB(High voltage feedback foot) Pin description:6.GND 7.+12V(IC supply pin) 8-9.Drive output 10.IFB mos tube Rds detection, overcurrent protection detection Over-current protection follows the 8-9-pin mos tube, the wrong connection will not boot