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PMP4478: PMP4478 transformer

Part Number: PMP4478

hello to all and TGIF.

we are looking for the datasheet or at least technical details of the transformer in the BOM fiel provided on the TI site for the PMP4478

no info is provided and the manufacturer wont reply to us, we tried calling and emailing.

we are now stuck and request your kind assistance.

Please share any info on the transformer JEPULS PN: BCK2001-190

no info provided on their site.

thank you for your support

  • Hello Andre,

    The transformer datasheet is not archived with the other projects files, but some preliminary work there suggests the following:
    Core is probably EFD20 on a horizontal 10-pin bobbin. For physical reference, see Wurth Electronics core #150-2124, bobbin #070-5981.
    Core material is unknown, but should be chosen to be suitable for low-loss 50~80kHz operation.
    Primary turns may be 77T, secondary may be 5T, auxiliary may be 10T. Primary inductance may be 650uH. Winding structure is indeterminate.

    These numbers are deduced from preliminary transformer trial-design files which may not be the final design, but that is all that is available in the archive. They seem reasonable for the application, and are not likely to be far off from the actual final design.
    I hope you find this useful information to continue with your work with the PMP4478 design.

    Regards,
    Ulrich
  • hello Ulrich,
    please excuse the delay.
    we were able to touch base with Wurth and they are now assisting.
    tanks again for your feedback.
    Andre