Our product has 8148 processor and the complete product is a black color plastic enclosure.
We are using the processor DM8148 in our product. We observed that 70 degC temperature measured on the heat sink which is placed on the 8148 processor @room temperature 25~30deg C. We used 8 video and 6 audio channels (TVP5158 - 2 nos).
Details of 8148's heat sink details:
1) Dimension of heat sink : 100mm (L) x 22.8mm (W) x 8mm (H)
2) Heat sink is fixed with our processor board through 2 (M2) screws.
We are not using forced cooling (usage of fan) mechanism as per our requirement.
Since our device operating temperature ratings are from 0degC to 65degC, 8148 processor will have more heat (temperature) when the external temperature raises up to 65degC.
8148's junction temperature range: 0 degC to 90 degC. We designed heat sink with considering the power consumption by the processor as 3.7W max.
We want to confirm, since the temperature rise of the processor is about 35 to 40 degC, it is difficult to bring the product into the environment up to 65degC.
Please suggest what are the possible way to limit the temperature for DM8148 processor.