TMS320F28035: Coefficients in 3p3z

liujun

Other Parts Discussed in Thread: SFRA

Currently, we plan to develop a digital power supply using F28035, but we need to use a 3P3Z compensator. Do you have any information or chapters on how to determine the 3P3Z coefficients for different power supply structures (BUCK, BOOST, PPFC)? What factors in the circuit determine the coefficients a1, a2, a3, b0, b1, b2, b3, and so on?
Thank you!

over 1 year ago

0 Cody Watkins over 1 year ago

TI__Mastermind 42195 points

Liujun,

Please look at the F28003x and F280013x families. They will provide more features at a lower cost.

https://www.ti.com/product/TMS320F280039C

https://www.ti.com/product/TMS320F2800137

Secondly, you will need to know the frequency response of your plant, in this case whatever hardware that you develop. From that you can begin to develop a controller and tune the coefficients such that your design will be well controlled. We offer SFRA and compensation designer free of charge to help determine the response of your plant and controller.

https://www.ti.com/tool/SFRA

https://www.ti.com/tool/COMPENSATION_DESIGNER

both of these tools can be found in the DPSDK, which should have some relevant digital power examples for you.

https://www.ti.com/tool/C2000WARE-DIGITALPOWER-SDK

Regards,
Cody