TMS320F28377D: epwm:

kevin.huang_FJXM

On the maximum clock frequency of epwm:

After reading the specification, it is clearly stipulated that the maximum clock of epwm can only be 100MHz (premise of main frequency 200MHz),

If my system needs 60K frequency, that is, the number of PWM is 1666, and the system voltage is 200V,

That is to say, the PWM resolution is only 120mV, which is a bit low. What can I do to improve this resolution?

over 6 years ago

0 Nima Eskandari over 6 years ago

TI__Guru 52040 points

You are running ePWM at 100MHz, and then genrating a 60kHz waveform?

0 Eruroraito over 6 years ago in reply to Nima Eskandari

Prodigy 150 points

No , I configure the epwm clock frequency of 100 KHZ (ClkCfgRegs.PERCLKDIVSEL.bit.EPWMCLKDIV=1;) ,and configure epwm frequency of 60 KHZ (EPwm3Regs.TBPRD=1666). If my system voltage is 200V,then the resolution is only 120mV(200V/1666),which is a bit low. What can I do to improve this resolution?