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UC3854BDW using on AC400V input condition

K. Sasaki14
Guru 10200 points
Other Parts Discussed in Thread: UC3854B, UCC28180, UC3854

My customer would like to use UC3854BDW on AC 400V condition.

In datasheet, it is described about 85VAC and 270VAC.

Is it possible to use this device on AC 400V input?

If it is possible, is there any word of caution?

  • 0
    TI__Intellectual 1050 points

    TI released a brand new PFC controller UCC28180, which is functionally simlar to UC3854B, but it has a lower pin-count, it reduces system BoM cost, it helps to reduce shunt power resistor power dissipation and it features programmable switching frequency. We recommend to use the UCC28180, instead of UC3854.

    http://www.ti.com/product/ucc28180

    The 400V AC input will not be directly applied to PFC controller. It will be scaled down using a resistor divider and applied to the pins of the PFC controller. It should be possible to use UCC28180 or UC3854B with 400V AC input, as long as it is used to implement a boost PFC converter operating from a single phase AC input.

    In order to provide more accurate answer, please share the following information:

    - is this a single phase AC input or a 3-phase AC input

    - what is output DC voltage ?

    - what is output power level ?

    - what is the desired switching frequency ?

     

     

    thanks,

    ramanan