UCD3138: Totem pole pFC-7KW

Venkatesh B

Intellectual 793 points

Other Parts Discussed in Thread: UCD3138

Tool/software:

I would like to design 7KW totem pole pfc using UCD3138

let me know feasilbility of design please

Thank you

venkatesh

over 1 year ago

0 Hemanth Sreeperumbudur over 1 year ago

TI__Expert 3090 points

Venkatesh,

UCD3138 architecture supports totem pole PFC configuration. The power stage and driver stages needs to be accordingly designed based on the power levels.

Regards

Hemanth

0 Tom Tom over 1 year ago in reply to Hemanth Sreeperumbudur

Intellectual 480 points

based on the power levels-----Would you please tell me how much power can be designed by the chip?

0 Hemanth Sreeperumbudur over 1 year ago in reply to Tom Tom

TI__Expert 3090 points

Tom,

As UCD3138 is being a digital controller, there is no power limit as such that I know of that is by the controller. It is the power stage that is - topology, circuit design, component selection, layout, thermals are what would pose constraints on the power levels.

Regards
Hemanth

0 Venkatesh B over 1 year ago in reply to Hemanth Sreeperumbudur

Intellectual 793 points

Hi Tom Tom &Hemanth Sreeperumbudur

Thanks for your valuable comment

I will check it

Thank you

venkatesh

0 Venkatesh B over 1 year ago in reply to Venkatesh B

Intellectual 793 points

I hope

ZCD sensing feasilibity is within Architecture

Thank you

venkatesh

0 Hemanth Sreeperumbudur over 1 year ago in reply to Venkatesh B

TI__Expert 3090 points

Venkatesh,

If you are talking about DCM or Critical Mode Conduction control of PFC, yes UCD3138 can support this.

Please refer : https://www.ti.com/lit/an/slua708/slua708.pdf in full and section 5.3 specifically.

Regards
Hemanth

0 Venkatesh B over 1 year ago in reply to Hemanth Sreeperumbudur

Intellectual 793 points

Hi hemnath,

Thank you for sharing ZVS at switching frequency

But i was mentioning Input current AC waveform zero crossing which is general issue of Totem pole PFC, hope you understand totem pole PFC sensing at input side

Thank you

venkatesh

0 Hemanth Sreeperumbudur over 1 year ago in reply to Venkatesh B

TI__Expert 3090 points

Venkatesh,

You could refer to the article "How to reduce current spikes at AC zero-crossing for totem-pole PFC (https://www.ti.com/lit/an/slyt650/slyt650.pdf)". This is based on UCD3138 controller.

Regards

Hemanth

Power management

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UCD3138: Totem pole pFC-7KW