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TPS65982-EVM: Programming to 15V and 20V

Russell Wetherley1
Expert 4255 points
Part Number: TPS65982-EVM
Other Parts Discussed in Thread: TPS65981EVM, TPS65988, TPS65987D

Hello E2E,

I am posting on behalf of a customer of mine.  They are hoping to use the TPS65982-EVM to test their product with 5, 9, 15, and 20V rails.  However, looking at table 2 of the user's guide, it looks like we generate 5, 12, and 20V. 

Why did we select these voltage outputs when acting as a source?  How come we can't configure the device to 9 or 15V? 

It looks like the TPS65981EVM could be used.  Are there any other EVMs in our portfolio that can be used to generate 5, 9, 15, and 20V as a source?

Thanks!

Russell  

  • 0
    TI__Expert 4455 points
    Hi Russell,

    I strongly recommend TPS65987D and TPS65988 for new designs. Each has a EVM with desired capabilities.

    All TPS659xx USB PD Controllers may be customized using the Configuration Tool at www.ti.com/.../tps6598x-config
    Users are able to design simple or complex Power Delivery behavior. In this case, the user is able to specify desired Source PDO, including contracts for 5,9,15,and 20V.

    Regards,
    Scott
  • 0 in reply to Scott T
    TI__Expert 4255 points
    Hi Scott,
    Thank you for the suggestions. My customer will just be using this for powering their product (sink) and will be using this EVM (source) in low volumes. They will probably need 2-4 EVMs, but they need to cover the 5, 9, 15, and 20V out use-cases. With this in mind, which would be the easiest to get up and running? What is the main difference between the TPS65987D and TPS65988?

    With that being said, there is talk of creating a product using USB-C as the source. A good experience with this testing will go a long way into designing it in to the next gen.

    Thanks!

    Russell
  • 0 in reply to Russell Wetherley1
    TI__Expert 4455 points
    HI Russell,

    The top level difference is TPS65987D is a one port device and TPS65988 is a two port device.

    The out of box configuration is for 4 Source PDOs: 5, 9, 15, 20 V. I recommend updating to the latest patch firmware using the configuration tool.

    Regards,
    Scott
  • 0 in reply to Scott T
    TI__Expert 4255 points
    Scott,
    Thanks again. This is very helpful. Do you know why the TPS65982-EVM is only programmable to 5, 12, and 20V? They already have one of these on hand so resourcing-wise it would be nice if there was a way to output 9 or 15V with this.

    Russell
  • 0 in reply to Russell Wetherley1
    TI__Expert 4455 points
    Hi Russell,

    The general issue is the EVM was developed some years ago and both hardware and spec have matured and changed. The available voltages were common to the spec originally but have gone through revisions and changes since.

    Regards,
    Scott