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PMP10468: data sheet for Wurth Elektronik 750811647

Derek Knapp
Prodigy 240 points
Part Number: PMP10468
Other Parts Discussed in Thread: PMP

I am looking to build a supply using PMP10468 as a reference design, however I can not locate any information on the transformer used in the design (Wurth Elektronik 750811647).

Can someone please provide the data sheet or an alternative part?

I also tried to use the WEBENCH tool to generate a design with the same parameters as this reference design, but the schematic comes out looking totally different, and uses a custom transformer.

Thanks,

Derek Knapp

  • 0
    TI__Expert 3200 points
    Hi Derek,

    I do not see a transformer construction file and usually it is best for you to contact Wurth directly as they are very supportive with their own PN information. I will request another AE to respond with the drawing if there is a drawing available.
  • 0
    TI__Mastermind 31130 points
    Hello Derek,

    This transformer on the PMP10468, although having a Wurth part number, is also a custom design based on criteria that the designer of the PMP provided to Wurth.

    The Webench design program provides a generalized solution based on a limited set of input and output parameters. There are options within Webench to add more user-specified constraints, such as choosing a specific maximum frequency, a certain transient response, etc. Many parameters go into the design of the transformer, whether using default assumptions by Webench or modified by the user. The transformer details, in turn, affect several resistor values in the converter circuit.

    It is understandable that the reference design's specific components could vary considerably from that of the Webench program, since the PMP designer uses his/her experience to tailor the circuit to more design goals than meets the eye, whereas Webench applies generalized design principles. The overall topology is not significantly different between the two, but specific values are. I attribute these differences to a real human with experience to accommodate unstated goals beyond the nominal input and output vs. a program following an algorithm from limited inputs.

    In either case, the designs serve as a reference and certainly can be tailored to additional specific requirements by the user.
    I have sent in a request to Wurth Elektronik for a copy of the spec sheet for that transformer, and will provide it as soon as I receive it.

    Regards,
    Ulrich
  • 0
    TI__Mastermind 31130 points

    Hello Derek,

    Here is the spec sheet for the Wurth 750811647 transformer: 750811647.pdf

    The Wurth Electronics Midcom Inc. representative tells me that samples are available and ready to ship.  Please contact them directly if you need some.

    Regards,Ulrich

  • 0 in reply to Ulrich Goerke
    Prodigy 240 points
    Thank you so much for the quick response. I will contact Wurth to request samples.

    Derek
  • 0 in reply to Derek Knapp
    Prodigy 40 points

    Hello Derek,

    Checking this transformer for 6.6V and 24V, total 5W, DC stacked outputs. what is your application?

    750811647 not found on WE website. will check production status and similar OTS transformers tomorrow.

    our application is 42 to 380VDC input, may switch to UCC287xx due to peak current limit of the 28911.

    Regards,

    Danny