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UCC28911: On useability of UCC28911's Non-Isolation Power Supply.

Pokkun
Genius 4695 points
Part Number: UCC28911
Other Parts Discussed in Thread: UCC28881, , UCC28700, UCC28C42

Hi, team.

I am considering whether it can be proposed by TI's power supply solution to the following specifications.

Among them, I think that UCC28881 seems to be usable.

However, I think UCC28911 seems to have greater output power and merit.

So question.

Can UCC 28911 use the following voltage specifications?

(If the answer is YES.)

What is the maximum, how many A's current (or what W of power) can be output?

＜Specification＞

・Input Voltage：280V_DC

・Output Voltage：12V_DC

・Output Power：Confirming later

※Non-Isolation

Could you help us?

Best regards,

Masumi Sekiguchi

  • 0
    TI__Expert 4015 points

    Yes, the UCC28911 can be used from a 280V DC input. Per section 6 of the datasheet, the max output power is about 8W in adapter/enclosed applications, and about 12W in open frame applications.

    Regards

    Billy

  • 0 in reply to Billy Long
    TI__Expert 4015 points
    To clarify Masumi, the UCC28911 can give more output power in non-isolated flyback configuration than the UCC28881 can deliver as a non-isolated buck.

    In non-isolated buck mode, the UCC28911 delivers less power than it does in flyback mode, and if your desire is to use a buck topology, the UCC28881 is probably a better choice.

    For higher output power/output current buck designs an external switch would be required such as shown in the www.ti.com/.../PMP10937 using a UCC28700, or the www.ti.com/.../PMP10834 using the UCC28c42.

    Hope this helps.
    Thanks
    Billy