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CC1310: CC1310

Izzy Gal
Prodigy 10 points
Part Number: CC1310

CC1310 burns after power is applied
We use the CC1310 in dozens of designs. A new design that is very close to an old one (schematics and PCB, minor changes) giving us serious problems that are really weird.
When applying the 3 volts VDDS to the CC1310 it starts normally (power consumption about 7 MA), but after a minute or so the consumption jumps to 20-60 MA, and the CC1310 stops working.
The 1.2 Volts on DCOUPL measures 2V, VDDR  measures 3V instead of 1.7
We assembled the board with minimum part count - just the CC1310, crystals, antenna circuit, dcdc coil, reset circuit and the essentials capacitors. Same results.

We even tried to make another PCB with 4 layers with internal ground layer (normally 2 layers is our standard for the CC1310) - but we get the same behavior. We checked meticulously every route, but everything looks ok.

In addition, we took a product with very close PCB design and striped it from almost all the components so it will be exactly the same assembly and BOM as the new design that fails. The old designed stayed rock solid.

Does anyone has some idea what can cause the CC1310 to malfunction?

Thanks in advance,

Izzy

  • 0
    TI__Expert 4840 points

    Hi Izzy,

    It's seems that their may be an incorrect connection in your design. The best way to help is for you to submit a design review and we can review both the schematic and layout to see if there are any problems in your design with the CC1310.

    Could you please follow the instruction here to submit the design for review: SIMPLELINK-SUB1GHZ-DESIGN-REVIEWS Design tool | TI.com

  • 0 in reply to Diego P
    Mastermind 6470 points

    A couple of things:

    - Does the CCFG file reflect what you are using on the board (32 kHz clock etc)

    - On a broken board, measure the impedance to ground for the pins related to the DCDC converter and see if they are different from a good board. My assumption is that you should see low impedance on one or more of the pins. 

    - Could you take the DCDC coil from a board of a previous design and place on one of the new boards and see if you get the same issue? 

  • 0 in reply to Diego P
    Prodigy 10 points

    Thank you Diego.
    We've checked all the connections, and compared it to previous working projects (We have dozens of boards running CC1013). Here is how we checked it:

    1. Checked the schematics and compared it to previous designs

    2. Checked the Altium PCB layout (even though the system highlight any wrong wiring)

    3. We checked the PCB net by net using ohmmeter for shortcuts and continuity.

    We will upload the schematics and the PCB to your design review, of course. Thank you!

  • 0 in reply to TheGhostOf
    Prodigy 10 points

    Hi,

    1. Our CCFG file reflects exactly what we use in the design. By the way, the design is identical (for the CC1310 circuit) to anther product that is mass produced with no issue, and has the same CCFG file.

    2. You are right, the broken boards show low impedance on the DCDC related pins.

    3. As we manufacture at this time 6 different products with the CC1310 we use the same coils in all the designs so we didn't try to swap coil with another coil (same value, same batch), BUT we tried to operate the circuit without the coil. In this mode of operation ("Global LDO Mode") we see the same problem.

    Thank you,

    Izzy

  • 0 in reply to Diego P
    Prodigy 10 points

    Hi Diego,

    I've sent you the electronic design, the BOM and the Gerber files yesterday.

    Didn't yo get it?

    Thank you,

    Izzy

  • 0 in reply to Izzy Gal
    TI__Expert 4840 points

    Hi Izzy,

    I received the files. I will review them and get back to you through email.

  • 0 in reply to Diego P
    Prodigy 10 points

    Thanks a lot