UCC28070A: IMO resistor calculation

Mame TINE

Part Number: UCC28070A
Other Parts Discussed in Thread: UCC28070

Hello, i want to know how to calculate the IMO resistor. i like to use your product in an interleaved pfc of 3.6 kw with input voltage 85 - 265 V rms and output voltage of 400 V.

over 7 years ago

0 Mame TINE over 7 years ago

Intellectual 305 points

I have an another question in the PSpice average model what the pin IRIPA and IRIPB refer to?

0 Peter Meaney over 7 years ago in reply to Mame TINE

TI__Mastermind 31580 points

Hi

The Rimo is calculated in the excel calculator tool which is available at www.ti.com/.../toolssoftware, See line 79.

I answered the IRIPA and IRIPB in your other post.

Regards

Peter

0 Mame TINE over 7 years ago in reply to Peter Meaney

Intellectual 305 points

thanks, i have an another question with the model pspice, what the pin F_kHz refer to? because i don't see this pin in the datasheet.

0 Peter Meaney over 7 years ago in reply to Mame TINE

TI__Mastermind 31580 points

The F_kHz is a signal output that displays the switching frequency signal based on the average model.

If you searched the 2e2 forum for F-kHz or UCC28070 you would have found numerous references to earlier posts which answer this question.

Regards

Peter

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UCC28070A: IMO resistor calculation