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LM5023: Switching controller design support

RAVINDRAN PALANI
Prodigy 60 points
Part Number: LM5023
Other Parts Discussed in Thread: UCC28704, UCC28750, PMP20771, PMP40144, PMP30720

We are looking into low-cost high efficiency Isolated / AC to DC / DC to DC converter for 18-40V AC/DC input to 5V @ 1.5A current. Kindly suggested the highly stable switching controller. 

  • 0
    TI__Prodigy 40 points

    Hello,

    Based on the specifications you provided, I have three recommendations in mind.

    1. UCC28704 - this is a low cost, highly efficient flyback with valley switching. This flyback is DCM, helping the controller be more stable.

    2. UCC28C5x - this PWM controller family of products will be lower cost than the UCC28704, but does not include valley switching. This controller enables DCM or CCM.

    3. UCC28750 - this is the lowest-cost flyback in our portfolio, but can still attain high efficiency. This flyback also enables DCM or CCM.

    Regards,

    Cole

  • 0 in reply to Michael Neswold
    Prodigy 60 points

    Thank you, Michael for your response. 

    The real requirement of our design is 21-27VAC or 21- 40VDC input to 5VDC @ 1A output. with ULVO cut off is < 9VDC. I need very cost-effective solutions for DC-to-DC converter followed by the AC to DC rectifications.

    Note: From the AC/DC input rectified unregulated 24-34VDC voltage applying to BDC motor 24DC, 95W and controlling the speed using PWM signal H bridge driver.   

    Could you please share the reference circuit design based on UCC28704/UCC28C5x and quick start calculation sheet.

  • 0 in reply to RAVINDRAN PALANI
    TI__Prodigy 40 points

    Hello,

    Here are 3 reference designs that are similar to your design requirements:

    PMP20771

    PMP40144

    PMP30720

    Please note that you can find and filter TI reference designs here: https://www.ti.com/reference-designs

    Also, to kick start a design process, please visit out WEBENCH designer tool that is in the product folder for each device. The "Design and Development" section of the product folder (https://www.ti.com/product/UCC28C52) has this helpful tool.