The IT8500G+ has overpower protection (OPP) and overcurrent protection (OCP) test function. Take the OPP test mode for example, when the input voltage reaches V_ON value, it will delay for a period of time, and then start to work. It will increase by a step value at regular intervals. At the same time, users can detect and evaluate whether the input voltage of the electronic load is higher than the OPP voltage. If it is, go down and continue to delay increment according to the cut-off power value until it reaches the cut-off power. Judge by voltage value first, and then power value according to the set power value range.