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TIDA-00951: PWM duty cycle change issue

Part Number: TIDA-00951


When we worked at buck mode ,we have noticed that change in the PWM does not change the actual PWM that trigger the gate, there for the d-s is triggerd at ~50%.

i found this thread, which ask Ram the same question but he did not answer it.

can you please clarify it ?

in the photo you can see that PWM trigger of 10% duty cycle correspond to ~50% d-s triggering

yellow and green = 10% duty cycle from the dsp

blue and orange = drain source of q6,q7