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PTN78060W Heat Dissipation

Pete Carpani
Prodigy 10 points
Other Parts Discussed in Thread: PTN78020W

Hello,

I'm designing a power supply board that operates in an environment that could potentially reach 60C ambient.  Is there a recommended way of dissipating the heat from the module?  Heat sink?  Thicker Cu on the top layer?  Fan?  The estimated max load for the unit is 2.5A at 12V Out operating at 24V In.  Thanks.

Pete

  • 0
    TI__Mastermind 38230 points

    Pete:

    I reviewed your operating air environment 60°C measured within 1cm of the inductor at  12Vout 2.5A load  and input voltage 24V . This operating environment (60°C) is at the  thermal limit for this regulator when soldered into a 100mm x100mm double sided copper plane.

     Adding a fan with improve the maximum ambient air temperature by 5°C. The additional heat sink will not improve its thermal limit to  above 60°C.

     PTN78020W set to  2.5A@ Vout12V with 24V input voltage  has an operating air temperature of 75°C, measured within 1cm,  when soldered to a 100mm x100mm double sided 2 ounce copper planes .

    Tom