TIDUEY6 April 2021
DC-DC converter deals with high voltages and currents and a safe operation of the converter for assumed safety goals is critical to ASIL D compliance. In the event of an over voltage detected in the converter, it is designed to be shut down. The safety MCU will monitor the safe operation of DC-DC converter and send the shut down signals as needed. In the event of PMIC device on the safety MCU control card determining unsafe power levels, it can also shut down the converter. However, during development and testing, C2000 MCU may be needed to generate the shut down signal. The choice between C2000 and safety MCU can be made by selection of 0E resistors, R71 and R72 respectively, on the control mother board. This section of the board is shown in Figure 3-5.