UCC28070A: ucc28070A

Chandran Panthalanickal

Part Number: UCC28070A
Other Parts Discussed in Thread: UCC28070

What will happen if I apply DC voltage instead of AC to the line input ?

Will it lead to any damage to any part of PFC circuit ?

What is the range of DC voltage which can be applied to the i/p of bridge rectifier of PFC circuit?

I am designing 1.75kW battery charger. I want to apply dc voltage for finding any short between line and neutral and short between output of bridge rectifier and ground. I asked above question for this purpose.

If I can apply up to 400VDC, I can test LLC circuit also with DC source.

over 1 year ago

0 Harish Ramakrishnan5 over 1 year ago

TI__Mastermind 24365 points

Hi Chandran,

Thank you for the query on UCC28070.

Yes you can apply DC input to UCC28070. You will have to ensure the DC signal is brought down to zero periodically for Kvff update. This is ideally designed for universal AC input voltage range, so 120V to 375Vdc with a bus voltage of 400V is typically used. You can refer the following e2e threads which describe the operation with DC input.

https://e2e.ti.com/support/power-management-group/power-management/f/power-management-forum/1136162/ucc28070-multiplier-settings-at-dc-input?tisearch=e2e-sitesearch&keymatch=UCC28070%252520AND%252520DC#

https://e2e.ti.com/support/power-management-group/power-management---internal/f/power-management---internal-forum/1177711/ucc28070-compatible-ac-and-dc-input?tisearch=e2e-sitesearch&keymatch=UCC28070%20AND%20DC#

https://e2e.ti.com/support/power-management-group/power-management/f/power-management-forum/1054478/ucc28070-with-dc-input?tisearch=e2e-sitesearch&keymatch=UCC28070%252525252520AND%252525252520DC#

Regards,

Harish

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UCC28070A: ucc28070A