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CC2650STK: LED Audio DevPack

Kaka
Guru 24520 points

Part Number: CC2650STK

Hi TI Experts,

Please let me confirm my question.

[Question]
According to the User's guide and wiki, the SensorTag battery is not necessary if the sensortag revsion 1.3 or later. Is this description correct?

TI wiki: processors.wiki.ti.com/.../LED_Audio_DevPack_User_Guide
User's guide: www.ti.com/.../tidua61.pdf
****************
For SensorTag hardware earlier than revision 1.2, the battery must be inserted while powering the LED Audio DevPack from the USB power supply. For SensorTag hardware revision 1.3 and later, the SensorTag does not require that the battery is inserted.
***************
In my understanding, if there is not the battery on Sensortag, the Analog switch(TPS22910AYZV) on SensorTag will may have a damage because this device will input the voltage for pin by LED Audio DevPack even though the Vcc of this device does not supply.

Best regards.
Kaka

  • 0
    TI__Guru** 106705 points
    Hi Kaka,

    Your understanding is correct.

    Best regards,
    Fredrik
  • 0 in reply to Fredrik K
    Guru 24520 points
    Hi Fredrik,
    Thank you for your confirmation. So,the description of TI wiki and user's guide is not correct. Right? If yes, would you please revise it correctly?
    Best regards.
    Kaka
  • 0 in reply to Kaka
    Guru 24520 points
    Hi Fredrik,

    We noticed that the switch device(TPS22910AYZV) has the Full-Time Reverse Current Protection.
    So, it seems that it is not problem for the latest SensorTag even though the Sensortag does not insert the battery when powered from external DEVPACK.

    Best regards.
    Kaka
  • 0 in reply to Kaka
    TI__Guru** 106705 points
    Hi Kaka,

    The description on the wiki and the user guide is correct. I am not sure where the confusion is.

    BR,
    Fredrik
  • 0 in reply to Fredrik K
    Guru 24520 points
    Hi Fredrik,

    I am confusing on your answer of "Your understanding is correct".
    My understanding is as below.
    ******
    In my understanding, if there is not the battery on Sensortag, the Analog switch(TPS22910AYZV) on SensorTag will may have a damage because this device will input the voltage for pin by LED Audio DevPack even though the Vcc of this device does not supply.
    ******
    So, I thought that we must insert the battery to SensorTag when use the DEVPACKs.

    Best regards.
    Kaka