This section describes the various protection circuitsprovided in the SIM6800M/MV series. The protectioncircuits include the undervoltage lockout for powersupplies (UVLO), the overcurrent protection (OCP), andthe thermal shutdown (TSD). In case one or more of theseprotection circuits are activated, the FO pin outputs a faultsignal; as a result, the external microcontroller can stopthe operations of the three phases by receiving the faultsignal. The external microcontroller can also shut downIC operations by inputting a fault signal to the FO pin.In the following functional descriptions, “HOx”denotes a gate input signal on the high-side transistor,whereas “LOx” denotes a gate input signal on the lowsidetransistor.