When dealing with such complex circuitry, one must make sure that the correct sensing and protection measures are used. In this device, the measurements are not only precise but also configurable. Infineon’s 6EDL7141 integrates three precision current sense amplifiers which can be used to measure the current in the inverter via shunt resistors. It supports single, double, or triple shunt measurement, and each current sense amplifier can be enabled individually. The architecture allows the designer to configure the gain and offset, detect positive and negative overcurrent, and define the thresholds. The gain and offset are configured internally and can be set via the user interface. Plus, an additional output buffer allows adding a variable offset voltage to the sense amplifier output, which can be set to four different values. This is done either by programming the internally generated level or by applying an external voltage at the V_REF input pin. With this implementation, it is possible to measure negative current in current shunts. Regarding the overcurrent, a positive overcurrent comparator detects an overcurrent condition on a motor winding for a positive shunt voltage. This comparator can be used to apply PWM cycle-by-cycle pulse truncation to limit the maximum motor current. An additional negative overcurrent comparator is used to detect the overcurrent condition on motor winding for negative shunt currents. Both these overcurrent comparators are equipped with a de-glitch timer. Finally, a built-in digital-to-analog converter is used to program the thresholds of the overcurrent comparators.