ucc28950 full bridge open loop bode plot TINA average model

ziopaper

Other Parts Discussed in Thread: UCC28950

Hello,

I am trying to obtain the open loop bode plot (control to output) of the average model of full bridge + UCC28950.

Please see attached file for my configuration. I get a result that is not consistent with the transfer function given in slua560c, not even the low frequency value. It seems to be very dependent on the propagation delay parameter.

Can you advise?

Thank you

8233.fullbridge_avg_model_OL-at TI.TSC

over 10 years ago

0 ziopaper over 10 years ago

Intellectual 940 points

I might have found a major problem in my model: the current source as load is not appropriate for open loop measurement. Replacing it with a resistor probably fixed it (still verifying that it matches the transfer function)

0 Mike O' over 10 years ago in reply to ziopaper

TI__Guru 66135 points

Tina models and spice models are handled by TI's elab/power lab. You will have to go directly to these sites to get support for these models.

Regards,

Power management

Power management forum

ucc28950 full bridge open loop bode plot TINA average model