Hello,
Looking at the DRV103 datasheet, a table is given of duty cycles and the corresponding R_pwm necessary at 3 different frequencies (5kHz, 25kHz, 100kHz). An equation for calculating any duty cycle is even given for the 25kHz frequency.
However, I cannot find a generalized equation for calculating the necessary R_pwm for other frequencies. Table 2 gives 6 different oscillator frequencies and the associated R_freq values, so it seems that for 3 of those frequencies (500Hz, 10kHz, 50kHz) there is no way from the datasheet to calculate R_pwm.
Is there a resource somewhere that provides the means of calculating the resistors needed to configure PWM at these other frequencies?
I have created a best-fit line using Figure 5 to find R_pwm for any duty cycle at 5kHz, 25kHz, and 100kHz, but I am still unable to calculate R_pwm when the oscillator is set to a different frequency such as 50kHz.
Thanks
