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TPS60250: Test methods for electrical disturbances from electrostaticdischarge

Tommy
Intellectual 535 points
Part Number: TPS60250


Hi E2E,

When we used TPS60250 for ESD test-- air discharge (15kV).

The IC will trigger protection and shut down during the test.

At this time, we keep the power-on state, and restore the test environment to normal conditions, the TPS60250 still has no output.

I would like to know whether IC has self-recovery function, and what is its judgment logic?

BR.

  • 0
    TI__Mastermind 35560 points

    Hi Tommy,

    Have you checked whether the IC has already damaged? Will IC still work if when power off and then power on after ESD test?

    BR

    Patrick

  • 0 in reply to Patrick Yao
    Intellectual 535 points

    Yes, we checked the IC. It still work if we power off and then power on.

  • 0 in reply to Tommy
    TI__Mastermind 35560 points

    Hi Tommy,

    When the IC has no output, could you please check the registers setting by I2C?

    BR

    Patrick

  • 0 in reply to Patrick Yao
    Intellectual 535 points

    Hi Patrick

    When IC has no output, we can still configure the register through I2C.

  • 0 in reply to Tommy
    TI__Mastermind 35560 points

    Hi Tommy,

    I mean to read back the registers value when IC has no output.

    BR

    Patrick

  • 0 in reply to Patrick Yao
    Intellectual 535 points

    Hi Patrick,

    I made some mistakes in my earlier reply.

    Now, let me correct some information:

    1. We have done 8KV and 15KV ESD tests, and the results show that IC has no output in the process of ESD test. And after restoring the normal environment,It still no output.

    2. After the normal environment is restored, there is no feedback on TPS60250 configuration status of MCU through I2C interface.

    3. We try to cut off the VIN power supply (+5V) of TPS60250 and re-supply power to TPS60250. It still has no output. During this process, MCU keeps working and 3.3V power supply of I2C is not disconnected. 

    4. If we restart the whole product, the TPS60250 can get back to work.

  • 0 in reply to Patrick Yao
    Intellectual 535 points

    Hi Patrick,

    I made some mistakes in my earlier reply.

    Now, let me correct some information:

    1. We have done 8KV and 15KV ESD tests, and the results show that IC has no output in the process of ESD test. And after restoring the normal environment,It still no output.

    2. After the normal environment is restored, there is no feedback on TPS60250 configuration status of MCU through I2C interface.

    3. We try to cut off the VIN power supply (+5V) of TPS60250 and re-supply power to TPS60250. It still has no output. During this process, MCU keeps working and 3.3V power supply of I2C is not disconnected. 

    4. If we restart the whole product, the TPS60250 can get back to work.

  • 0 in reply to Tommy
    TI__Mastermind 35560 points

    Hi Tommy,

    Could you please share your schematic with me? If you have confidential concern, you could send the schematic through message.

    And may I know why you choose this device to drive your LED strings? Actually we have some new devices so could you please share me with your spec requirements so that I can help to check if there are better solutions?

    BR

    Patrick