CCS/TMS320F28377D: How to control a Peak Current Mode Controlled Buck converter using CMPSS in TMS320F28377D

Sunrise

Part Number: TMS320F28377D

Tool/software: Code Composer Studio

Dear everyone,

I want to use the CMPSS in TMS320F28377D to control a Buck converter using the Peak Current Mode. However, I do not know how to design the programme in TMS320F28377D.

I found the diagrams in spruhm8g i.e., 《TMS320F2837xD Dual-Core Delfino Microcontrollers Technical Reference Manual》as follows. Unfortunately, I have not found the routines from TI.

In order to use CMPSS, I refer to the routines given by TI, i.e., 《cmpss_asynch_cpu01.c》and《cmpss_digital_filter_cpu01.c》. Unfortunately, no matter how I modify the program, I can't implement the function shown in the figure above, that is, the output is synchronized with EPWM.

Thanks.

over 6 years ago

0 Hrishi Nene over 6 years ago

TI__Genius 10820 points

Hi,

The F2837x devices have type-4 PWMs, which include features that simplify this peak current mode control implementation. We do not have a software example currently available. The attached file shows how you could configure the device for this operation.

I hope you find this useful.

HrishiPCMC Waveform generation with type-4 PWMs.pdf

0 Sunrise over 6 years ago in reply to Hrishi Nene

Prodigy 95 points

Dear Hrishi :
Thank you very much for your reply.

I have read the attached file you gave me, however, it is too simple and I do not know how to set the registers.

Can Ti's engineers give me an simple software example. I've been puzzled by this question for months.

Thank you very much !

zhaoyang zhao

0 Hrishi Nene over 6 years ago in reply to Sunrise

TI__Genius 10820 points

Hi Zhaoyang,

We hope to make a software example available soon (probably 2019). Till then users will need to derive the register configuration based on the attached file.

Hrishi

C2000™︎ microcontrollers

C2000 microcontrollers forum

CCS/TMS320F28377D: How to control a Peak Current Mode Controlled Buck converter using CMPSS in TMS320F28377D