https://community.nxp.com/t5/i-MX-Processors/Which-is-correct-%CF%88JT-or-R%CE%B8JC/m-p/1341529#M180235 <P><SPAN>Dear Sirs,</SPAN></P><P><SPAN>I'm estimating the junction temperature of the iMX6ULL(MCIMX6Y2CVM08AB).</SPAN></P><P><SPAN>Natural convection occurs without using a heat sink.</SPAN></P><P><SPAN>The <U><STRONG>package top temperature</STRONG></U> is 81 </SPAN>°C<SPAN> , which was measured by a thermocouple wire.</SPAN></P><P><SPAN>Also, I calculated the power consumption is 1.8W.</SPAN></P><P><SPAN>Is it okay to calculate the <U><STRONG>junction temperature</STRONG></U> using <U><STRONG>ψJT (not RθJC)</STRONG></U> as follows?</SPAN></P><P><span class="lia-inline-image-display-wrapper lia-image-align-inline" image-alt="tokonmei2007_0-1631789594274.png" style="width: 400px;"><img src="https://community.nxp.com/t5/image/serverpage/image-id/156293i34AB429764F136A4/image-size/medium?v=v2&amp;px=400" role="button" title="tokonmei2007_0-1631789594274.png" alt="tokonmei2007_0-1631789594274.png" /></span></P><P><SPAN>Tjunction =81</SPAN>°C+2.3°C/W*1.8W</P><P>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;=85.14°C</P><P>&nbsp;</P><P>Thank you.</P><P><SPAN>Best Regards,</SPAN></P> Tue, 28 Sep 2021 01:40:03 GMT tokonmei2007 2021-09-28T01:40:03Z https://community.nxp.com/t5/i-MX-Processors/Which-is-correct-%CF%88JT-or-R%CE%B8JC/m-p/1341529#M180235 <P><SPAN>Dear Sirs,</SPAN></P><P><SPAN>I'm estimating the junction temperature of the iMX6ULL(MCIMX6Y2CVM08AB).</SPAN></P><P><SPAN>Natural convection occurs without using a heat sink.</SPAN></P><P><SPAN>The <U><STRONG>package top temperature</STRONG></U> is 81 </SPAN>°C<SPAN> , which was measured by a thermocouple wire.</SPAN></P><P><SPAN>Also, I calculated the power consumption is 1.8W.</SPAN></P><P><SPAN>Is it okay to calculate the <U><STRONG>junction temperature</STRONG></U> using <U><STRONG>ψJT (not RθJC)</STRONG></U> as follows?</SPAN></P><P><span class="lia-inline-image-display-wrapper lia-image-align-inline" image-alt="tokonmei2007_0-1631789594274.png" style="width: 400px;"><img src="https://community.nxp.com/t5/image/serverpage/image-id/156293i34AB429764F136A4/image-size/medium?v=v2&amp;px=400" role="button" title="tokonmei2007_0-1631789594274.png" alt="tokonmei2007_0-1631789594274.png" /></span></P><P><SPAN>Tjunction =81</SPAN>°C+2.3°C/W*1.8W</P><P>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;=85.14°C</P><P>&nbsp;</P><P>Thank you.</P><P><SPAN>Best Regards,</SPAN></P> Tue, 28 Sep 2021 01:40:03 GMT https://community.nxp.com/t5/i-MX-Processors/Which-is-correct-%CF%88JT-or-R%CE%B8JC/m-p/1341529#M180235 tokonmei2007 2021-09-28T01:40:03Z