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Where are all 24 PWM outputs on the F28379D located?

mike buba
Intellectual 450 points
Part Number: TMS320F28379D
Other Parts Discussed in Thread: SYSCONFIG

Tool/software:

Hi,

I am trying to implement a multi-level converter using the F28379D development kit.

On the webpage, it says PWM (Ch) 24, but in the schematics, I see only PWM8 (schematics in attachment)

Where are the other PWM outputs located?

Are they all High Resolution PWMs (HRPWM)? I am thinking of using SiC MOSFETs and 30–50 kHz switching frequency. I remember reading somewhere that only 16 are HRPWM. Will the other PWM outputs be able to support a 50 kHz switching frequency?

Regards, MB

Edit:

A TMS320F2837xD Dual-Core Real-Time Microcontrollers Technical Reference Manual, section 15.14, page 1995 says: "typical low-frequency PWM operation (below 250kHz) does not require HRPWM. HRPWM capability is most useful for high-frequency PWM requirements of power conversion topologies" , so I guess I am okay with the standard PWM.

5861.F2837x_180controlCARD_R1_3_SCH_02Oct2015.pdf

  • +1
    TI__Genius 15830 points

    Hello,

    If you use the SysConfig GUI, you can easily see there are 12 EPWM modules available (24 channel outputs total) and the "pinmux" tab and  "device view" in sysconfig also shows the pins/GPIOs they are routed to and where they are assigned. If using a LaunchPad, there may be more limitation in which signals are accessible on board pins. 

    The datasheet reveals which EPWM modules support HRPWM (EPWM modules 1 thru 8 support HRPWM for a total of 16 outputs):

    30-50kHz should be fine without HRPWM as the documentation references.

    Best Regards,

    Allison