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DLPNIRSCANEVM: Problem with the Nirscan Nano EVM Microcontroller board

Part Number: DLPNIRSCANEVM
Other Parts Discussed in Thread: BQ24250

Hello,

We are a spectrometry software company and we encounter a problem with one of our Nirscan Nano EVM equipment. The 2 equipments were working great until now but we now encounter the following issue:

It seems that the microcontroller board of one of our Nirscan Nano EVM is damaged: the equipment doesn't power up when connected to the USB power source.

Having 2 Nirscan EVM sets we have tried to use the microcontroller board from the working Nirscan equipment on the non-working one and the non-working one worked again using the microcontroller board from the working set.

Having had a look at the chips on the non-working microncontroller board, it seem that the U10 chip has smoked...

So, my question is: how can we get a replacement microcontroller board to replace the damaged one?

Thank you in advance for your help,

Best Regards,

Pierre

  • Hi Pierre,

    Welcome to the DLP Forums and thank you for your question! Sorry to hear that one of your EVMs is broken. As far as replacement, TI doesn't sell the individual boards from the EVM, only the complete system. That being said, the design for all the boards is available online if you'd like to order your own from a local PCB manufacturer. www.ti.com/.../tida-00554

    Your other option would be to contact Young Green Energy, the manufacturer of the EVM and see if they are able to sell you the board that you are looking for: www.ti.com/.../companyfolder.tsp

    Sincerely,
    Paul
  • Hi Pierre,

    Would you be able to tell me what happened to the board? Do you know how U10 got damaged?

    -Paul
  • Hi Paul,

    Thank you for your responses to my email.

    U10 chip got damaged when I tried to connect a 3.7V Lipo battery to the battery connector of the microcontroller board according to the instructions that I found in the Nirscan Nano EVM user's manuals.

    I must say that I still do not understand why it behaved this way since I don't think I did anything wrong..

    I will avoid to try doing the same thing on our 2nd unit since I guess that it will lead to the same result but I don't know why.

    But the current status is that we have this non-working unit that we need to get back to life :-)

    Kind Regards, Pierre

  • Pierre,

    I have fried the BQ24250 when I shorted the battery pins or connected the battery backwards in polarity.

    Is there a part number for the LiPo battery? i would like to check it out over here and see if there is an issue with this particular battery model. Please note, as stated on Section 4.1 of the NIRscan Nano User's Guide, that the supported battery must satisfy:

    • maximum charge current of 1 A or more
    • maximum charging voltage of 4.23 V or higher
    • battery over voltage protection at 4.305 V or higher
    • battery under voltage lockout at 2.5 V or less. 

    Best regards,
    Pedro