Other Parts Discussed in Thread: LAUNCHXL-F28379D
Tool/software: Code Composer Studio
Hello,
I am trying to modify the PWM frequency of the TIDM-DC-DC-Buck reference design to suit my project specification (Buck converter). The logical place seems to change the value in the main.syscfg UI highlighted in the following image. Following the 'lab 1' for open loop application of the reference design, I was able to make it work at the default switching 200 kHz. However, I can't change that for anything higher than 500 kHz. Any frequency above 500 kHz when you write 0.25 to the duty cycle, the continuous "expression" window would not update any data and nothing is output it from the pins (confirmed through oscilloscope).
Is there a software limitation on how fast this reference design can switch? How can I change the PWM frequency from the default 200kHz to 1MHz?
Normal write and update operating at 200kHz when writing 0.25 to the duty cycle
When writing to the duty cycle at 1MHz (same with other frequency from 500 to 1000 kHz), it is as if nothing is running.
P.S. All of the codes are left as default. Attached is the project if it helps. Thank you in advance