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  • TI Thinks Resolved

TPS61099: Boost converter design

Prodigy 140 points

Replies: 5

Views: 103

Part Number: TPS61099

Good morning, I am designing a boost converter that has an input voltage range between 2V and 3,5V from a 3V nominal lithium battery (the voltage range is considered to be the cut-off battery voltage and the maximum battery voltage) and an output of 4V with an output load current of 20uA. I have found the boost converter in object because it shows very low quiescent current and a good efficiency at light load that are the most important requirements to avoid an early battery discharge, But using the webbench tool , after setting the requirements above, the system gives me an error saying to change the input requirements... How about this problem? is the light load current a problem for the correct operation of the boost converter? (maybe the equivalent switching frequency is too low???).

Thank you.

Regards.

  • Hi Roger:

    So sorry that I'm in oversea travel these days. Please allow me reply next Monday. Thanks for your patient waiting in advance.

    Best Regards

    Minqiu

  • Hi Roger:

    Thanks for your kind patience.

    I have check the simulation with your spec, failed~ I guess the model used in WEBENCH is not good for ultra low load during burst mode. I will give the feedback to simulation team. Thanks for your notice.     (But you could choose a larger load to have a reference~)

    TPS61099 could work well for the application you mentioned. The details of burst mode could be checked in "8.3.1 Boost Controller Operation" and Firgure 19 in datasheet. If you have further questions, just ask.

    Best Regards

    Minqiu

  • In reply to Minqiu Xie:

    Good morning, thank you for the reply. But I see from the simulation you sent me that the load current set is 0,02A and not my load current 20microampere.

    Trying to reset my spec in WEBENCH, it continues to fail.

     

     

    Waiting for your kindly response.

    Best regards.

  • In reply to ROGER BORZUMATI:

    Hi Roger:

    I have edited the reply after I find the error~~ Please check the latest one~

    Best Regards

    Minqiu

  • In reply to Minqiu Xie:

    Hi Roger:

    As long time not hear you, I assume you have solved the issue. I'll close this post.

    If not, just reply below. Thank you~

    Best Regards

    Minqiu

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