CCS： GPIO-00 and GIO-01 do not have PWM waveform output when TIDM-PSFB-DC-DC kit is operating in PCMC mode

Deagle

Tool/software: Code Composer Studio

I recently studied a previously purchased TIDM-PSFB-DC-DC kit, and the VMC mode test of the kit was very successful during the learning process!
But when I learned the PCMC method yesterday, there was a problem: no matter whether INCR_BUILD = 1 or INCR_BUILD = 2, GPIO-00 and GPIO-01 always have no PWM waveform output, and GPIO-02 and GPIO-03 have PWM waveform output. I have studied the problem for a long time, but I don’t know why.

over 4 years ago

0 Deagle over 4 years ago

Prodigy 110 points

0 Chen Jiang ti over 4 years ago in reply to Deagle

TI__Genius 15555 points

Hi Deagle,

This can be caused by several reasons. Please start with build 1 and check the primary current sensing. Also you can start with a low current reference. Is the overcurrent protection triggered? I see the parameter OC_Faultflg is not found in the picture but there should be one flag signal in the code. Thanks.

Regards,

Chen

0 Deagle over 4 years ago in reply to Chen Jiang ti

Prodigy 110 points

Hello, Chen Jiang ti
Chen Jiangti is an expert, can see the cause of the problem. It is because the error has triggered the overcurrent protection. Therefore, the PWM outputs of GPIO-00 and GPIO-01 are turned off. After the false trigger is solved, GPIO- 00 and GPIO-01 have a PWM output right away.
Thank you, Chen Jiang ti!

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CCS： GPIO-00 and GIO-01 do not have PWM waveform output when TIDM-PSFB-DC-DC kit is operating in PCMC mode