UCC29910A: VBULK

Takahiro Sugiyama

Part Number: UCC29910A
Other Parts Discussed in Thread: TPS92075

Tool/software:

When Vin is set to 100V in the design calculator and VBULK is set to 50V, CBULKH becomes negative. Is it possible to set a lower value for VBULK?

29 days ago

0 Soumya Kundu 26 days ago

TI__Prodigy 220 points

Hi Takahiro,

Can you please send me the design calculator with the values according to the operating point of your application?

Also, can you please let me know if your application needs a specific hold up time?

Regards,

Soumya

0 Takahiro Sugiyama 26 days ago in reply to Soumya Kundu

Prodigy 20 points

20250906_UCC29910A Design Calculator_SLUC265A.xlsHello Soumya-san Please refer attached worksheet. Input voltage is 100VAC and output voltage is set to 48VDC. So, Output capacitor show -211uF. As a result, the design did not progress.As for PFC, this was my first design, and I tried to purchase the TPS92075, but it was out of stock.I need to make a sample with these specifications by the end of the year. I'm having trouble making progress on the design. I want to miniaturize the board and design a step-down PFC.