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Can TPS659xx work standalone?

Jehangir Parvereshi
Intellectual 510 points


Considering using one of the the TPS659xx units without hooking up to the OMAP35xx via I2C/SPI i/F.  The main use is for getting 3.3V, 1.8V, 2.8V on default power-up with a 5V input.  Thanks. JP

  • 0
    Intellectual 510 points

    Also, would like to leverage the built-in charger for charging a 2-cell NiMH, again with a 5V input & no books to the OMAP353xx.  Is this possible?

    Thanks,  JP

  • 0 in reply to Jehangir Parvereshi
    TI__Genius 15100 points

    Hi,

    I would be interested in your application. If you can provide some info that will help.

    You can use the device in the configuration you mentioned for having the required rails. You can treat it as any other regular power part. However, you can use it for 2-cell batteries, this supports only single cell. 

    Please keep in mind that you will not be able to change the voltage levels without I2C access. Only the default power up rails will be active after power up.

     

     

  • 0 in reply to Gandhar Dighe
    Intellectual 510 points

    Hi,

    This is a smart phone application which today uses discrete LDOs, 2 -cell NiMH and 5V wall power adapter for charging and powering the phone.

    The issue I see is that the built-in charger is for Li-Ion not NiMH. If we were to access the I2C bus can we program the charging algo for NiMh. If so, is 5V +/- 10% adequate for charging a 2-cell NiMh battery in this application?

    Thanks - JP

  • 0 in reply to Jehangir Parvereshi
    TI__Genius 15100 points

    Hi,

    These are different battery chemistries. This device supports only Li-Ion. I am sorry that I missed this part.

    I dont know details about NiMH chemistries and I would not try to use this charger with a NiMH.