4.7 Protection (CMPSS)

Most power electronics converters need protection from an overcurrent event. For this design multiple comparators are required, and references for the trip must be generated, as shown in Figure 13.

Figure 13. Trip Generation for PWM Using Comparators and Reference Generators

All this circuitry is avoided when using the C2000 MCUs such as TMS320F28379D and TMS320F280049C, which have on-chip windowed comparator as part of the CMPSS that are internally connected to the PWM module and can enable fast tripping of the PWM. This device saves board space and is cost efficient in the end application as extra components can be avoided using on-chip resources, as shown in Figure 14.

Figure 14. Comparator Subsystem (CMPSS) Used for Overcurrent Protection