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UCC28880: Buck/Boost regulator

Javier Hernandez12
Prodigy 80 points
Part Number: UCC28880
Other Parts Discussed in Thread: UCC28881, TPS54531

Hello

I am looking for an alternative to this part in TI.

I have found this but my question es if there is another to be assimilated more.

I need a Input between 2 ~ 25V, adjustable to 3V3, 5V or 12V.

Best regards

  • 0
    TI__Mastermind 40120 points
    Hello Javier,

    Based on the Rds(on) and power-level ratings of the MPS part you found, the UCC28881 is a better substitute for it than the UCC28880.
    These devices are targeted for off-line applications typically operating between 85Vac and 265Vac, and your specified input range is extremely low in comparison.

    Can you please clarify and expand on your design requirements, because it is possible that neither the TI nor the MPS parts may be suitable for your application.
    Specifically:
    - Is your input voltage actually 2V minimum to 25V maximum, and are these rms or dc values?
    - Is the application's output voltage to be adjusted from one voltage to another while operating, or do you want a common design adaptable to 3 fixed outputs?
    - What is the output power level at each voltage?
    - Is there a no-load requirement on the application?

    With this information, we will be better able to help you.

    Regards,
    Ulrich
  • 0 in reply to Ulrich Goerke
    Prodigy 80 points

    Hello Ulrich,

    Thank you for the reply,

    Sorry I have not been able to respond before.

    I was using the TPS54531 but is step-down. I need it for low voltages. 30V max. 

    Input Voltage -->  1~6S Lipo battery

    Out 1 --> 5V  2A

    Out 2 --> 12V  (is enough with 500mA).

    Out 3 --> 3V3  800mA (I was thinking of using the LD1117 and connecting it to the 5V output so I guess I would need to increase the 5V output to 3A.)

    Is there a no-load requirement on the application?

    No

    Regards,

    Javier

  • 0 in reply to Javier Hernandez12
    TI__Guru**** 191445 points
    It looks like your application is more suited to a non-isolated solution. Your input voltage range is extremely wide. Is it possible to either raise the minimum input or lower the maximum input? I am moving this to the non-isolated dc-dc forum.
  • 0 in reply to JohnTucker
    Prodigy 80 points

    Hello John,

    It looks like your application is more suited to a non-isolated solution.

    Ok, thank you.

    Your input voltage range is extremely wide.


    Yes. From 1S (3V7) up to 6S (22V2).  Typical 3S (11V1) and 4S (14V8) , draining 20A max. to 3S and 30A max. to 4S with this motor BR2205

     

    Is it possible to either raise the minimum input or lower the maximum input?

    Minimum, from 2S (7V4)

    Maximun is possible to lower up to 22V2.

    I am moving this to the non-isolated dc-dc forum.

    Thank you.

     

    Regards