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.

LP87524J-Q1: [LP87524JRNFTQ1]

Part Number: LP87524J-Q1
Other Parts Discussed in Thread: LMR23630-Q1

PN : LP87524JRNFTQ1

I'm inquiring. 

Please check if the product above is mass-produced or a sample.

Thank you.

  • Hi Hwang,

    Thanks for contacting. LP87524JRNFTQ1 is in mass-production. You can request free samples from TI.com but also full reels if needed.

  • I have a question about short circuit protection.

    Each output voltage is short circuit test result.

    Exceeds forward current limit found on the data sheet.

    The results of measurement for each output voltage are attached.
    Please check the measurement result.

    Do you have any data measured by TI?
    Send me if you have.

    LP87524JRNFTQ1 Data sheet SPEC.

    Buck0 3.3V Result

    Buck1 1.2V Result Buck2 1.0V Result

    Buck3 1.8V Result

  • Hi Hwang,

    In a short circuit condition there can exist higher current spikes than specified in current limit spec. Are those current waveforms measured in series with inductor? Not after output capacitor?

    What inductor is used for BUCKs? If inductor saturates due to higher than specified load it can affect current limit correct operation.

    We have data but it is not presentable format.

  • In a short circuit condition there can exist higher current spikes than specified in current limit spec. Are those current waveforms measured in series with inductor? Not after output capacitor?

    --> Test point series with inductor , Short point : Output capacitor

      

    What inductor is used for BUCKs? If inductor saturates due to higher than specified load it can affect current limit correct operation.

    --> Inductor : DFE252012PD-R47M Intactors on the Data Sheet

    We have data but it is not presentable format.

    --> I wish I had data to compare with my results.

    Ps. In the same way, LMR23630-Q1 matches the data sheet when testing the product.

    However, the results of the LP87524JRNFTQ1 product are measured higher than the MAX Current on the data sheet.

  • Hello,

    You can see example plot of the short in the datasheet Figure 86. If the short is introduced during normal operation the current can be higher. 

    Thanks.

    Regards,

    Tomi Koskela

  • Jari Niemela13 said:

    Hello,

    I answered your question.

    I have an additional question.

    Was the limit current on the data sheet measured on a series with inductor? Not after output capacitor?

    I measured the inductor current.
    Is the limit current of the data sheet the inductor current? Is that the test point I measured?

  • Hello,

    The current was measured in series with the inductor in the datasheet plot. 

    Thanks.

    Regards,

    Tomi Koskela