UCC256301: Can I design power supply using UCC256301 which can work on both AC mains and DC inputs

Pravin Khisti

Prodigy 100 points

Part Number: UCC256301
Other Parts Discussed in Thread: TIDA-010015, UCC256404, , UCC256402, UCC256403

I am using TIDA-010015 design. Can this design work with DC input supply voltage

over 2 years ago

0 Manikanta Pallantla over 2 years ago

TI__Genius 13245 points

Hi Pravin,

Do you mean you want to use only LLC topology with a DC input voltage. If yes, it should work.

Also, I would recommend using UCC256404 which is our new generation LLC controller instead of UCC256301. UCC256404 will have a different BLK start threshold than UCC256301 but contains many of the same features as UCC256301 such as HV startup, X cap discharge, etc.

Along with TIDA-010015, please refer following links which designing your power stage.

https://www.ti.com/lit/pdf/sluubx3 -- UCC25640x EVM

https://www.ti.com/lit/zip/sluc675 -- UCC25640x design calculator

Regards

Manikanta P

0 Pravin Khisti over 2 years ago in reply to Manikanta Pallantla

Prodigy 100 points

Hi Manikanta,

Thanks for the information.

I am using TIDA-010015. It mentions AC inputs only and UCC256301 have feature of xcapacitor discharge, which expects AC input (zero crossing wave form). Thats why I was doubting that this design will work with DC input.

Thanks I will refer the links you shared.

Regards

Pravin

+1 Manikanta Pallantla over 2 years ago in reply to Pravin Khisti

TI__Genius 13245 points

Hi Pravin,

Since you are using only LLC converter, you can use either UCC256402 or UCC256403 depending on whether you want to have HV startup or not.

As you can see in the above screen shot, x-cap discharge is disabled in both these ICs.

Regards

Manikanta P

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UCC256301: Can I design power supply using UCC256301 which can work on both AC mains and DC inputs