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Original question:

PTD08D210W: -

PTD08D210W:

Jeevan Sidharth G
Prodigy 190 points
Part Number: PTD08D210W
Other Parts Discussed in Thread: UCD7242, UCD9248

Hi,

We have used 4 PTD080D210W power modules in our design in which one of the module is programmed to output 1V & 1.8V. In this 1.8V section failed when powering the board and when measured the output voltage was 2.9V but the 1V output was working fine. Tried reprogramming the board but the result was the same. When we tried to replace the IC UCD7242 the board again worked fine from which we came to the conclusion that the IC has failed.

Now we are trying to do the RCA for this failure and thought your input could help in doing this.

Please do let us know the possible causes for this.

Thankyou.

Regards,

Jeevan

  • 0
    TI__Genius 15217 points

    Hi Jeevan,

    Our US team will check it and reply you tomorrow.

  • 0
    TI__Mastermind 18370 points

    Hi Jeevan,

    If indeed the UCD7242 failed, that indicates that an overcurrent, overvoltage or overtemperature caused this.
    What UCD9XXX controller are you using together with the PTD module? Is the controller a standard one?

    When output voltage was 2.9V, what was the load current?
    What is the status of FF-A and FF-B signals going back to the controller?
    Are you having a single failure? Out of how many boards/Modules?

    Regards,

    Yitzhak

  • 0
    Prodigy 190 points

    Hi Yitzhak,

    It is used with the UCD9248 PMIC. When the output was 2.9V the load current was 600mA.Not sure about the FF-A and FF-B signals and this issue as of now is only observed in one module only. Even in one module one of the outputs was observed to be faulty not the other(UCD 7242 features two outputs).

    Regards,

    Jeevan

  • 0 in reply to Jeevan Sidharth G
    TI__Mastermind 18370 points

    Hi Jeevan,

    I wish we have collected more data before you fixed this problem.

    For example, it would be interesting to see the PWM waveform sent by UCD9248. What is the duty cycle?

    If this happens again (hope not), we should try to collect data and debug further before fixing it.

    Regards,

    Yitzhak