TDK-Lambda PH-A280 Series Instruction Manual - Tdk-Lambda
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TDK-Lambda
PH-A280 Series
INSTRUCTION MANUAL
6-15. Operating Ambient Temperature
There is no restriction on mounting direction but there should be enough consideration for airflow so that heat
does not accumulate around the power supply vicinity.
Determine external components configuration and mounting direction on PCB such that air could flow through
the heatsink at forced cooling and conduction cooling.
By maintaining actual ambient temperature below 85 ºC and base-plate temperature below 100 ºC, operation is
possible. For details on thermal design, refer to Application Notes “Thermal Design”.
Note) Maximum base-plate temperature is 100 ºC. For worst case operating condition, verify base-plate
temperature at measurement point indicated in Fig. 6-16.
Moreover, ambient air temperature shall be confirmed at a point 10 mm or less from the power
supply side. Use below 85℃ ambient temperature.
Fig.6-16
Measurement Point of
Fig.6-17
Derating Curve
Base-plate Temperature
To further improve reliability, it is recommended to use this power supply with ambient temperature and
base-plate temperature derating.
6-16. Operating Ambient Humidity
Take note that
condensation could lead to power supply abnormal operation or damage.
6-17. Storage Ambient Temperature
Take note that sudden temperature changes can cause condensation buildup, and other harmful affects to each
terminal solder.
6-18. Storage Ambient Humidity
Take enough care when storing the power module because rust which causes poor solderability would form in
each terminal when stored in high temperature, high humidity environment
.
6-19.
Cooling Method
Operating temperature range is specified by the base-plate temperature. Therefore, several methods of heat
dissipation are possible
For details on thermal design, refer to Application Notes “Thermal Design”.