TDK-Lambda CUS200LD Manuel D'installation page 19

5-3. Output Derating
Refer to the output derating below, load (%) is percent of maximum output current value at rated output
voltage. Make sure that the specified temperature range is maintained.
Conduction cooling
Power supply should be mounted on an Aluminum plate or heat sink with bottom side of the chassis,
recommended AL plate size is 400*400*2mm.
The power supply base plate temperature (as shown below) should be monitored to ensure the effectiveness of
the heat sink, and both Ta and Tb must not exceed the derating curve below for safety operation of the power
supply.
Maximum output power and output current derating vs. ambient temperature and base plate temperature:
Mounting A,B,C
Ta (°C)
-25 - +45 -25 - +75
+70
120
100
80
70
60
40
20
0
o
Ta ( C)
-30 -20 -10 0 10 20 30 40 50 60 70 80
o
Tb ( C)
Ta: Ambient Temperature
Tb: Base plate temperature, measured at the center of the bottom side of the chassis, as shown in the picture
below.
Tb (°C) Load (%)
100
+90 40
Ta (
75 Tb (
90
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TDK-Lambda
CUS200LD
INSTRUCTION MANUAL
Mounting D,E
Ta (°C) Tb (°C)
-25 - +35 -25 - +65
+60 +80
120
100
80
70
60
40
20
0
o -30 -20 -10 0 10 20 30 40 50 60 70 80
C)
o
C)
Load (%)
100
40
65 80