Dear team,
I would like to ask about the thermal characteristic of i.MX283.
My customer is evaluating MCIMX283DVM4B on his board and has a question on the thermal characteristics of i.MX28.
In their test, the temperature of i.MX28 surface reached 64 degrees C when the environmental temperature was 25 degrees C.
At that time, the usage rate of i.MX283 was 50%.
CH | Simbol | measurement point | Temp. Deg.C | Estimated DegC in 45 DegC of environmental | Max.Ratings |
---|---|---|---|---|---|
CH1 | U1 | surface of i.MX283 | 63.8 | 84.1 | 70 |
The power consumption of DC24V on the board is 140-150mA.
Is that reasonable?
Do you have any ideas to lower the temperature?
Estimated temp number in the 45 degrees C of the environmental temp is 84 degrees C, and the number exceeds the maximum ratings.
The customer has a doubt whether the temp really can reach to 64℃ even when the usage rate was 50%.
Thanks,
Miyamoto
Solved! Go to Solution.
Hi AVNET JAPAN FAE
this depends on many factors, in particular how i.MX28 is powered.
If it is powered from 5V then I think it can easily reach such temperature:
5V*0.15A=0.75W RθJA=36C/W , "four layer board (2s2p)" (Table 21 IMX28CEC )
delta T = 0.75W * 36C/W= 27C --> 25 +27 =52C
For minimizing temperature it is recommended to use power from DCDC_BATT.
Best regards
igor
Hi AVNET JAPAN FAE
this depends on many factors, in particular how i.MX28 is powered.
If it is powered from 5V then I think it can easily reach such temperature:
5V*0.15A=0.75W RθJA=36C/W , "four layer board (2s2p)" (Table 21 IMX28CEC )
delta T = 0.75W * 36C/W= 27C --> 25 +27 =52C
For minimizing temperature it is recommended to use power from DCDC_BATT.
Best regards
igor