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TPS65086: TPS650860, TPS650861, TPS650864

Part Number: TPS65086

While working on a devkit for TPS650860 I realized that not all outputs have the some output voltage range. I know it is related to the OTP setting but I cannot find the actual values mentioned anywhere in the datasheet for these parts. While reading the forum i found the settings for TPS650860 but can't find anything for the other two. Are these available anywhere online?

best, MB

  • Hi Michal,

    The TPS65086x PMICs all have the same voltage range capabilities. The TPS650861 is the user-programmable version so the voltage defaults can be changed but all the versions have the same ranges. These voltage ranges can be seen in the "Features" section of the TPS650861 datasheet (pictured below).

    For more documentation, see the TPS650861 product page.

    Regards,

    James

  • Hi James,

    My understanding is that the actual range depends on the step size, i.e. 10mV vs 25mV. The step size is set in OTP memory during production. Can these be changed at runtime?

    To be more exact. I'm evaluating a TPS650860EVM devkit and wanted to set Buck 2 to 0.85mV. With the current step size being set to 25mV the lowest I can go is 1V. Can I somehow reprogram the step size or is this an intrinsic limitation of this particular part? 

  • Hi Michal,

    The step size cannot normally be changed during runtime on the TPS650860 and TPS650864 versions since they are pre-programmed. In order to test features such as step size changes, we recommend the BOOSTXL-TPS650861 evaluation board. 

    This board can be used with the TPS65086100 Non-Volatile Memory Programming Guide to explore the full programming features and it comes with the TPS650861 chip inside the socket.

    Regards,

    James

  • So if I'm reading this correctly I either have to design my power staging around preexisting settings while using TPS650860 or TPS650864, or go laborious way and preprogram OTP on each chip before assembly if I go with TPS650861. Does this sound about right or am I still missing something obvious here?

  • Hi Michal,

    I believe Arrow offers services for large scale programming production for the TPS650861 devices. There are cases where a new pre-programmed variant can be generated and shipped from our end but this would involve a business quote with the marketing or sales teams.

    Regards,

    James

  • Thanks James for your help, I think I have all the information I needed to proceed. I believe I'm in this peculiar spot between being a small one-man shop and big enough client to get the chips preprogrammed before they even get to us.

    Thanks again for your prompt replies!

    best, MB