UC3854: Is it possible to supply the UC3854 BUCK PFC circuit?

Hsu cheng

Expert 1565 points

Part Number: UC3854
Other Parts Discussed in Thread: UCC29910A

Is it possible to supply the UC3854 BUCK PFC circuit?

Customer condition:

Vin: 220VAC~575VAC

Vo:310V/4A

over 7 years ago

0 Peter Meaney over 7 years ago

TI__Mastermind 31580 points

Hi Hsu,

At 220Vac the peak value of the AC voltage is 311, a buck PFC will not be able to maintain regulation of a 310Vdc output voltage.

TI does have a buck PFC controller, UCC29910a and some technical articles on designing buck PFC stages, www.ti.com/.../slup264.pdf

Regards

Peter

Power management

Power management forum

UC3854: Is it possible to supply the UC3854 BUCK PFC circuit?