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UCC28070 current loop gain and phase measurement

power huang
Prodigy 20 points
Other Parts Discussed in Thread: UCC28070

Hi,

I am trying to measuure UCC28070(interleaving CCM PFC) current loop gain and phase, there is two phase in the circuit, does that mean that I have to diable one phase's output and set the load at half power with DC input in order to get gain and phase margin?

 

Regards

Huang 

 

  • 0
    TI__Guru* 86266 points

    Hello Huang,

    Because of current synthesis this cannot be measured with a network analyzer.  The only thing you can do is compensate the loop theoretically and test the current loop stability with large signal transients such as load or start up.

    Regards,