TPS53659: Significance of Transient parameter selection

Hi 

All these parameters are from TI DCAP+ topology . We can share if you company has NDA. 

Customer need fine tune these based on the system requirements, layout to achieve the best performance and loop stability 

Regards

Yihe

We have NDA with TI. Using this part in multiple design and noticed some issue in one of the project and discussing with TI team to identify the cause. We didn't get a clear explanation for various parameters used in Fusion GUI under the tab Transients. That is the reason for raising this question in E2E forum.

Please share the detailed information on these parameters . If required, we can add you in that mail thread. 

Is the frequency of Vramp is constant. I am trying to understand how the SW frequency changes when we compare the feedback signal with constant frequency Vramp signal. Another point I noticed in the document is the shape of Vramp.   It is different in 2 different documents

Which one is correct?

Thanks. This is helpful.

Is the clock frequency is constant or change with load condition?  If it is changing, would like to understand which parameters control the clock frequency.

As per above diagram, PWM frequency depends on clock frequency, and we observed that Switching frequency is changing with operating conditions.

 I understand that it is a constant on time device but trying to understand how the off time is controlled. 

Regards,

Gopal