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Thermal parameters

Divya Jyothi1
Intellectual 270 points

Hi E2E Community Team,

As we are going to do the thermal analysis, we required the below thermal parameters of the part LMZ31503RUQT .

Kindly share thermal parameter values.

θJC (°C/W)  =
θJB (°C/W) =

Thanks & regards,

Divya

  • 0
    TI__Guru 50120 points

    Hi Divya,

    Let me talk with the design team to see if they have any documentation/information on this. When I get more information on this I'll get back to you asap.

    Regards,

    Jimmy

  • 0 in reply to Jimmy Hua
    Intellectual 270 points

    Hi Jimmy,

    Also please share the TJ - Junction temperature for all requested parts.

    Waiting for your reply.

    Thanks & regards,

    Divya

  • 0 in reply to Divya Jyothi1
    TI__Guru 50120 points

    Hi Divya,

    Please take a look at this app note to understand the reason why the psiJT and psiJB values were created in place of the thetaJC and thetaJB.

    We do not have an accurate way to get thetaJB and thetaJC numbers for our device, so instead the psi value is an attempt to provide users with an estimated thermal metric.

    As for the ambient temperature, the part has been tested to operate to maximum loading(3A) safely at a maximum ambient temperature of 85C. This can be seen on Figure 4 of the datasheet.

    Regards,

    Jimmy