Other Parts Discussed in Thread: TMS320F28375D, , CSD19536KTT
I'm working on an +48V battery powertrain project.
I'm using TMS320F28375D MCU and DRV8353SRTAR mosfet driver.
The application work in a custom PCB. This is part of the schematics (I can't attach all due to "confidential" issue). The D1201 is NOT mounted.
So, I made some calculations with my MOSFET's values using slva714d. I think these maybe correct:
The DRV8353 is set accordly with the calculation attached.
Now, the problem regards the waveform of the High side gate MOS. The deadtime is generated inside the MCU (~1200ns at the moment...I'm tuning the driver and so I go with caution...). I also use the default deadtime of the DRV8353 (I don't disable it).
This is the waveform regard T1201 and T1202.
You can see the strange behavior in the falling edge of the High side mosfets.
I tried to reduce PWM freq and change source/sink Idrive without success. Where is the error? Any suggest?