• State
  • Locked Locked
  • Replies 1 reply
  • Subscribers 62 subscribers
  • Views 488 views
  • Users 0 members are here
Support feedback
Options
Options
Related

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

Thermal Shutdown of TP659037

chandan kumar
Intellectual 440 points
Other Parts Discussed in Thread: TPS659037, AM5728

Hi ,

We have designed a PCB with the reference of AM5728 EVM and we have used TPS659037 PMIC IC .

It has been observed that after few hours of continuous working the board is getting OFF.The PMIC outs are disabled.

So without we initiating the off request ,the only possibility of the board going off may be due to the PMIC thermal shutdown.

So what are the options we have to avoid this issue.?

Please suggest us both hardware and software options to tackle this issue.

Also please suggest us ,by using  a heat sink for PMIC will the thermal issue be solved ? Can you please suggest a  suitable part no of heat sink that can be used for TPS659037 IC ?

Will be awaiting for your reply.

Thanks,

chandan

  • 0
    TI__Genius 16410 points
    Hello Chandan,

    First I recommend reading the SWOFF_STATUS register after the board is shut off and turned on again. This will tell you what caused the power-off - if TSHUT is set then it was a thermal shutdown.

    The two main ways to reduce temperature of the PMIC is to either reduce power consumption of the processor (use lower frequency, or lower utilization, but this requires lower performance), or to use a heat-sink or heat-spreader. The requirements of the heat sink or heat spreader heavily depend on the system design and power consumption, so I suggest to run a thermal simulation with the heat sink you are considering to use.

    Which version of the PMIC are you using? If you're using TPS6590376, then one option is to switch to TPS6590377 - the TPS6590377 has separate domains for GPU, DSP, and IVA, so if you are running all 3 of them then having separate domains may increase the efficiency of the converters by having lower load on each output.

    You can use the PMIC power estimation tool to estimate the power consumption in both configurations, to see if this would make an impact for your use case.
    e2e.ti.com/.../3366.power-estimator-tool

    Regards,
    Karl