TIDUF33 june 2023
To generate high resolution, a C2000 with high-resolution PWM output capability is used. The high-resolution counter is capable of 150-ps time step, which is equivalent to 16-bit resolution at 100-kHz PWM frequency for a 100-MHz CPU clock. Table 2-1 shows PWM resolution at different switching frequencies.
PWM FREQUENCY |
REGULAR RESOLUTION (PWM) | HIGH RESOLUTION PWM | ||
---|---|---|---|---|
100-MHz EPWMCLK | ||||
(kHz) | BITS | % | BITS | % |
20 | 12.3 | 0.02 | 18.1 | 0 |
50 | 11 | 0.05 | 16.8 | 0.001 |
100 | 10 | 0.1 | 15.8 | 0.002 |
150 | 9.5 | 0.15 | 15.2 | 0.003 |
200 | 9 | 0.2 | 14.8 | 0.004 |
250 | 8.6 | 0.25 | 14.4 | 0.005 |