TIDM-1000: How input line frequency is related with PWM frequency?

Annu Sheoran

Part Number: TIDM-1000

Hii

Case 1: I have set PWM switching frequency 200 Khz and input line frequency 60 Hz . The PWM Is not generating from the f28379d micro controller .W HY?

Case 2: : I have set PWM switching frequency 200 Khz and input line frequency 200 Hz . The PWM Is generating from the f28379d micro controller.W HY?

Please reply any of your suggestion might help me.

Thank you

over 2 years ago

0 Chen Jiang ti over 2 years ago

TI__Genius 15935 points

Hi Annu,

This looks weird. Which build are you testing this? build 1 open loop?

You should always see PWM output unless the protection is triggerd.

Regards,

Chen

0 Annu Sheoran over 2 years ago in reply to Chen Jiang ti

Prodigy 120 points

Hello sir

I am using the build 4. When input line frequency is 200HZ the output voltage is coming constant only . i.e it is regulating the voltage and current.

0 Chen Jiang ti over 2 years ago in reply to Annu Sheoran

TI__Genius 15935 points

Hi Annu,

As I mentioned in another thread, we have not tested the 200Hz input condition so that may cause some potential issue.

However, case 1 still looks weird. You may want to check if the tripzone flag is set to see if some protection is triggered.

Regards,

Chen

C2000™︎ microcontrollers

C2000 microcontrollers forum

TIDM-1000: How input line frequency is related with PWM frequency?