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BUCK-BOOST

eli
Guru 13485 points
Other Parts Discussed in Thread: TPS55340, TPS40210, LM5175, PMP10624, LM5022

looking r power supply solution, buck-boost or SEPIC regulator:

 

Vin = 9-32V

Vout = 12V

Iout = 1A

I found TPS55340 which may be suitable. However, Webench is not able to simulate it and the reference design is for Vin=6-18V.

I prefer a regulator (integrated switch) over a controller. Can you advice?

  • 0
    Prodigy 5 points

    Hello Eli,

    Using our TI DESIGNS landing page you can search for power designs.

    I entered your specs in the  "search power designs by parameters"

    I get 2 results. Both are 12Vout at 1Amp

    Automotive Range SEPIC Converter Delivers 12V@1A Reference Design

         

    This wide input voltage range SEPIC operates from an input of 6V - 48V and produces greater than 89% efficiency. Its compact size and low cost make it idea for automotive and telecom applications.

    Wide input voltage range SEPIC (12V @ 1A)

       

    This SEPIC converter provides 12W (12V at 1A) over an input voltage range of 8V to 48V. PMP8313 uses the TPS40210 current mode boost converter.

    Both of these meet your needs.

    I would also take a look at the LM5175.
      

    It is a 4 switch buck boost controller that is Webench supported.
    You can use Webench from the LM5175 product folder, enter your design needs, and watch it run.
    This device would also be able to meet your needs.
    Attached is my Webench report from the run I created.

    webench_design_916945_906_238124800.pdf

    I don't believe SEPIC designs are Webench supported, yet.

    Are these suggestions helpful?

  • 0 in reply to Ed Walker
    Guru 13485 points

    Hello

    Thanks.The new/updated requirements are

    Vin=9-36V

    Vout=12V

    Iout=3A

    I found only PMP10624

    Any other recomendation?

  • 0 in reply to eli
    Prodigy 5 points

    The LM5175 is THE part to use for this.

    PMP10624 looks to be a perfect fit.

    You can also use Webench to create a custom circuit for you,  as I mentioned earlier.

    Attached is the design I just ran using Webench.

    Webench LM5175 9-36Vin; 12Vout @ 3A.pdf

  • 0 in reply to Ed Walker
    Guru 13485 points

    Hi

    WE found also a lower cost device, LM5022,with two ref design, at PMP7768 and PMP7338.

    Both look OK but PCB files are missing.

    Can you help with the missing files?

  • 0 in reply to eli
    Prodigy 5 points

    Yes I agree that the LM5022 is a lower cost device, but in power design cost is not everything.
    I know from experience.

    LM5022 is not synchronous switch operation, as a result its efficiency is lower than a 4 Switch Buck Boost.
    LM5175 is a higher performance solution.

    The LM5022 topology does work well however in many applications.

    PMP7768 is an older National Semi design and the board files are not available.

    This seems to have been built using the AN-1557 LM5022 Evaluation Board (Rev. C).

    Those board files are not available but the Users Guide does show the layout layers.

       

    PMP7338 was built on PMP7305 PCB

    Attached is the board file for this, Gerber zip file.
    PMP7305A.zip