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UCC28019A: Acceptable input power range

Part Number: UCC28019A
Other Parts Discussed in Thread: UCC28180, UCC28070

Hi team,

My customer would like to use this as a PFC chip at the front end of a design. They want to know if there is any limitation of using the chip from the power perspective on a single phase? Specifically they're wanting to know can they use it for a 1 horsepower application and a 3 horsepower application. The datasheet quotes “The controller is suitable for systems in the 100 W to >2 kW range over a wide-range universal ac line input.”, and since 3 HP is about 2.2kW, and with factors into account, they believe the input power will be 2.5kW and just want to make sure it'll work since 2.5kW is not really specified (how far above 2kW can this part support)?


  • Hi Lauren,

    The power is handled by the power devices outside of the controller so the controller itself doesn't have a maximum power level it can support.  Generally speaking however, with single phase CCM PFC controllers such as the UCC28019A and the UCC28180, the switching currents and magnetics start to get "unreasonably" large around 3kW.  There are other factors that may make this more or less "reasonable" such as the input voltage range the design has to operate over. 

    It's a bit subjective as to what is "reasonable" or "unreasonable" since different applications have their key care-abouts.  Beginning somewhere around 2-3kW, customers typically prefer a multiphase solution such as the UCC28070, so that the power is divided between the two phases and therefore the power devices and magnetics can be sized accordingly.

    Let me know if you need more information.  Also, please provide a PPMID.

    Thank you,