Phytec phyCORE-i.MX 6, Руководство по оборудованию

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phyCORE
®
-i.MX 6 [PCM-058]
58 ©
PHYTEC Messtechnik GmbH 2016 L-808e_2
17.1 Product Temperature Grades
Caution!
The right temperature grade of the Module depends very much on the use case. It is
mandatory to determine if the use case suites the temperature range of the chosen module
(see below). If necessary a heat spreader can be used for temperature compensation
The feasible operating temperature of the SOM highly depends on the use case of your
software application. Modern high performance microcontrollers and other active parts as
the ones described within this manual are usually rated by qualifications based on
tolerable junction or case temperatures. Therefore, making a general statement about
maximum or minimum ambient temperature ratings for the described SOM is not possible.
However, the above mentioned parts are available still in different temperature
qualification levels by the producers. We offer our SOM's in different configurations
making use of those temperature qualifications. To indicate which level of temperature
qualification is used for active and passive parts of a SOM configuration we have
categorized our SOM's in three temperature grades. The table below describes these
grades in detail. These grades describe a set of components which in combination add up
to a useful set of product options with different temperature grades. This enables us to
make use of cost optimizations depending on the required temperature range.
In order to determine the right temperature grade and whether the maximum or minimum
qualification levels are met within an application the following conditions must be defined
by considering the use case:
•
Determined processing load for the given software use case
•
Maximum temperature ranges of components (see table below)
•
Power consumption resulting from a base load and the calculating power required (in
consideration of peak loads as well as time periods for system cool down)
•
Surrounding temperatures and existing airflow in case the system is mounted into a
housing
•
Heat resistance of the heat dissipation paths within the system along with the
considered usage of a heat spreader or a heat sink to optimize heat dissipation
Product
Temp.
Grade
Controller Temp Range
(Junction Temp)
RAM (Case Temp) Others (Ambient)
I
Industrial -40 °C to +105 °C /
Automotive -40 °C to+125 °C Industrial
-40 °C to +95 °C Industrial
-40 °C to +85 °C
X
Extended Commercial
-20 °C to +105 °C Industrial
-40 °C to +95 °C Industrial
-40 °C to +85 °C
C Commercial 0 °C to +95 °C
Consumer
0 °C to +95 °C Consumer
0 °C to +70 °C
Table 33: Product Temperature Grades