UCD3138064: UCD3138 constant phase shift value in LLC mode

Marc Ferrer96

Part Number: UCD3138064

Hello,

I have an LLC converted controlled with frecuency modulation and phase shift modulation with auto switching mode.

I would like to know how to set a certain phase shift value ( constant) when my controller is in frecuency modulation, without affecting on the rest of the control.

Would be something like: phase shift from 90º to 3º and frecuency modulation with a fixed value of 3º.

Thanks,

Marc.F

over 6 years ago

0 Amiel Hussain over 6 years ago

TI__Expert 4070 points

Hello,

An engineer is looking into this and will respond.

0 Sean Xu over 6 years ago in reply to Amiel Hussain

TI__Genius 14580 points

Without mode switching between PSFB and LLC, you can get 3 degrees phase shift in LLC mode by using PHASE TRIGGER register. But I am not sure you can have this feature with mode switching.

0 Marc Ferrer96 over 6 years ago in reply to Sean Xu

Prodigy 140 points

I guess Phase trigger could be useful if I was always in LLC mode. If not, will UCD use filter duty for PSFB and phase trigger register in LLC mode?

0 Sean Xu over 6 years ago in reply to Marc Ferrer96

TI__Genius 14580 points

If it is voltage mode control, use the filter to do phase shift; if it is peak current mode control, use current trigger signal for phase shift.

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UCD3138064: UCD3138 constant phase shift value in LLC mode