Kontron AM4220 - Manual (Page 42)

27 AM4220
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Table 4-1:MMC Temperature Sensors Thresholds
Temperature values are measured with an accuracy of 1°C.
4.2 External Thermal Regulation
The external thermal regulation of the AM4220 is realized using a dedicated heat sink design in conjunction
with a system chassis that provides thermal supervision, controlled system airflow and thermal protection,
such as increased airflow, reduced ambient air temperature, or power removal.
The heat sink provided on the AM4220 has been specifically designed to ensure the best possible basis for
operational stability and long-term reliability. The physical size, shape, and construction of the heat sink
ensure the lowest possible thermal resistance. In addition, it has been specifically designed to efficiently
support forced airflow concepts as found in modern AMC carriers and MicroTCA systems.
4.2.1 Forced Airflow
When developing applications using the AM4220, the system integrator must be aware of the overall system
thermal requirements. All system chassis requirements must be provided to make sure they satisfy these
requirements. As an aid to the system integrator, characteristics graphs are provided for the AM4220.
4.2.2 Thermal Characteristic Graphs
The thermal characteristic graph shown on the following pages illustrates the maximum ambient air
temperature as a function of the linear airflow rate for the power consumption indicated. The diagram is
intended to serve as guidance for reconciling board and system considering the thermal aspect. When
operating below the indicated curves, the AMC runs steadily without any intervention of thermal supervision.
When operated above the indicated curves, various thermal protection mechanisms may take effect
eventually resulting in an emergency stop in order to protect the AMC from thermal destruction. In real
applications this means that the board can be operated temporarily at a higher ambient temperature or at a
reduced flow rate and still provide some margin for temporarily requested peak performance before thermal
protection will be activated.
Sensor Lower Non
Recoverable Lower Critical Lower Non
Critical Upper Non
Critical Upper Critical Upper Non
Recoverable
Temp Air Out - 10°C - 5°C + 0°C + 85°C + 90°C + 95°C
Temp CPU - 10°C - 5°C + 0°C + 105 °C + 110°C + 115°C
Temp Dual GE - 10°C - 5°C + 0°C + 105 °C + 110°C + 115°C
WARNING
As Kontron assumes no responsibility for any damage to the AM4220 or other
equipment resulting from overheating any of the components, it is highly
recommended that system integrators as well as end users confirm that the
operational environment of the AM4220 complies with the thermal considerations
set forth in this document.