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UCC28065: Information on UCC28065 compared to UCC28063A and UCC28064A

Guru 10345 points
Part Number: UCC28065
Other Parts Discussed in Thread: UCC28063A, UCC28064A, , UCC28063, UCC28064

Tool/software:

Hi,

UCC28065 is released as a successor model to UCC28063A and UCC28064A.

Q1 UCC28065 has an improved operating frequency compared to UCC28063 and UCC28064. This allows the use of smaller passive components, making the overall system more compact. Are there any other benefits to using UCC28065?

Q2 Please let me know if there are cases where it is better to use older devices such as UCC28063A and UCC28064A. Or is UCC28065 generally recommended for new designs?

Thanks,

Conor

  • Hello Conor,

    We will provide an answer tomorrow.

    Regards,

    Jonathan Wong

  • Hello Conor, 

    The main improvement in the UCC28065 is the capability of supporting higher switching frequency (double over UCC28064A).  I don't think there are any other improvements.  As you noted, higher frequency allows the use of smaller boost inductors.  The other component sizes really don't change significantly.  

    When higher switching frequency is not required, UCC28064A, UCC28063A or UCC28063 can be considered.  
    If burst mode is needed, or better control over phase-shedding is needed, then the UCC28064A (or -065) is the device to choose. 

    If no  burst-mode is needed and the phase-shed threshold can be less accurate, then the -063/A can be considered. 

    The choice may come down to considering the unit cost of each device and its feature set.

    Regards,
    Ulrich