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PTH12000W parts case Temp 110℃

Masazumi Ishii
Genius 3945 points
Other Parts Discussed in Thread: PTH12000W

Hello

I am using PTH12000WAH.
There is a question.

Although it is used on the following conditions,
the temperature of the parts carried in the module has reached 110℃.
Is this OK?　　　　　In OK, please teach me a reason.

Vin：12V
Vout：5V
Iout：3.25A
Ambient air temperature：40℃
Case temperature of Parts ：110℃（Attachment data ）

 Thank you。

PTH12000W.pdf
  • 0
    TI__Mastermind 38230 points

    Hello Masazumi:

    PTH12000WAH and PTH12000W series operating with 12Vin and 5Vout at 3.25Amps load thermal  conditions are normal with 40°C ambient temperature measured within 0.5cm of the power inductor inductor temperature is about 100°C.

    The published SOA / thermal derating data applies when the PTH12000W is soldered into  100mm x100mm PCB double sided 1 ounce copper pads.See the SOA data.
    The reported 110°C on the power inductor and 2 power FETS correlates to the published thermal  data  50-53°C operating ambient air temperature as measured within 0.5cm inductor.

    Tom

     

     

  • 0 in reply to Tom Guerin
    Genius 3945 points

    Hello　

    Thank you for the reply.
    There is a question by addition.

    To what times is the maximum temperature of the case temperature of FET and an inductor OK?

    Thank you

  • 0 in reply to Masazumi Ishii
    TI__Mastermind 38230 points

    Masazumi:

    Th absolute maximum derated case temperature limit on the power inductor an power FETS is 130°C.

    Tom