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Original question:

EMB1499Q: EMB1499 PWM_CLAMP

EMB1499Q: Charging function of EMB1499 not working

Jain Jose
Prodigy 75 points
Part Number: EMB1499Q

Hi ,

We have used  reference design Literature "SLUUAS6A "  for our BMS application. The gate pulse for the four the Mosfets of isolated forward converter is not generated  from EMB 1499 IC during charging.

Status of EMB1428 in GUI is showing "0x000010"  (hex).

Reference design which we have used is attached.Active Chipset Reference Design Guide.pdf

  • 0
    TI__Genius 17370 points

    Hi Jain,

    Could you please provide some more details? So you are using the exact reference hardware design and our provided example code/gui combination as well?

    Regards,

    Taylor

  • 0 in reply to Taylor Vogt
    Prodigy 75 points

    hi,

    Yes we are using exact reference hardware design as of in literature "SLUUAS6A". And in case of code we have used TI example code which is attached in the first attachment. And it is TI website code. For our LCU code we have made code which is present in the Active cell balancing folder. This is TI example code for 16 cells. Here we have used 12 cells and for our application is in TMS570ls0714pz controller.

     Exmple_Code.zipActive_Cell_Balacing.zip

  • 0 in reply to Jain Jose
    TI__Genius 9401 points

    Hi Jain, 

    You mentioned the problem is during charge. Is discharge working correctly for you? Please see my recommendations below to debug this issue:

    • Please make sure that devices are powered correctly (probe power pins on EMB1428 and EMB1499). 
    • Probe the SPI signals to make sure the correct command is being sent and that the device is responding without faults (response on SDO line). SPI transaction should look like figure 9 on EMB1428 datasheet. I would put breakpoints in the code to be able to see on an oscilloscope/logic analyzer the data that is being sent/received through SPI when the issue happens. 
    • If there is no fault, the code returned should be 0b1010.

    There are some faults that will cause all switches to be turned off, EN pin to go low, and the IC to enter sleep/shutdown mode. Description of the faults detected by the device can be found on the Fault Reporting section of EMB1428 datasheet (page 19).

    Regards,

    Leslie

  • 0 in reply to Leslie Marquez
    Prodigy 75 points

    Hi Leslie,

    Discharging is working properly . When charge command is given we are getting the  Status of EMB1428 in GUI as  "0x000010"  (hex).

  • 0 in reply to Jain Jose
    TI__Genius 9401 points

    Hi Jain, 

    Unfortunately I don't have information to interpret the error / status message coming from the GUI. I recommend following the steps mentioned on my previous post to debug the issue. If you can also control the devices directly with the MCU without using the GUI, this way you can reduce the variables of where the issue is coming from and focus only on the software and signals observed from the MCU and between EMB1428 and EMB1499. 

    Best regards,

    Leslie