I.MX6Q Play video carton at high temperatures

[tommyduan]

     We use CPU is i.MX 6Quad_MCIMX6Q6AVT10AD,When we do the high temperature 75 ℃, USB video will be caton, the picture is not smooth, like lost frames!What could be the reason? How do I find out why?

[Yuri]

Hello,

  General thermal considerations (relations between ambient and junction temperatures)

are provided in app note AN4579 (i.MX 6 Series Thermal Management Guidelines).

In particular, customers can use thermal characteristics from i.MX6 Datasheet :

   Tj = Ta + RthJA * Pd

Tj - junction temperature;
Ta - ambient temperature;
RthJA - Thermal resistance Junction to Ambient;
Pd - power consumption.

http://www.nxp.com/assets/documents/data/en/application-notes/AN4579.pdf

  The mentioned "the high temperature 75 ℃", looks like, is ambient temperature, meaning 
that the junction one may exceed the allowed maximum. This means i.MX6 normal operation

cannot be guaranteed.  Perhaps a heat sink is need for the i.MX6.

Regards,

Yuri.

[tommyduan]

Thanks for your replay!When I test, I found that high temperature caton, CPU temperature is 92 ℃, the CPU frequency down to 400M, where is the temperature setting?What is the default software of  high temperature?

[Yuri]

Hello,

   What is BSP release in the case?

Regards,

Yuri.

[tommyduan]

• We use BSP release:M6.0.1_2.0.0-ga

[Yuri]

Hello,

  Your system is based on Linux 4.1.15 kernel.

Customers can use section 2.7 (Thermal) of i.MX_Linux_Reference_Manual.pdf

https://www.nxp.com/webapp/Download?colCode=L4.1.15_2.1.0_LINUX_DOCS 

Regards,

Yuri.