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TDK-Lambda
CUS600M
INSTRUCTION MANUAL
MODEL: CUS600M-12
Ta (°C)
Direction A
Direction B
Direction C
Direction D
LOAD (%)
LOAD (%)
LOAD (%)
LOAD (%)
-20 - +25
100
100
100
100
35 93.3 100 100
100
40 90 94.3 100
100
45 85 90.2 100
100
50 80 86.2 100
94
55 75 82.1 100
88
60 70 78 90
82
70 60 70 70
70
Peak output power @ Convection cooling
Peak output power is acceptable in any condition if the components listed in the following table must not exceed the temperatures given. To
determine the component temperatures the heating tests must be conducted in accordance with the requirements of the standard in question.
Consideration should also be given to the requirements of other safety standards. Test requirements include: PSU to be fitted in its end-use
equipment and operated under the most adverse conditions permitted in the end-use equipment handbook/specification and which will result in
the highest temperatures in the PSU. To determine the most adverse conditions consideration should be given to the end use equipment maximum
operating ambient, the PSU loading and input voltage, ventilation, end use equipment orientation, the position of doors & covers etc.
Temperatures should be monitored using type K fine wire thermocouples (secured with cyanoacrylate adhesive or similar) placed on the hottest
part of the component (out of any direct airflow) and the equipment should be run until all temperatures have stabilized.
Below is typical application:
Peak output power up to 10 seconds at convection cooling is allowed. For peak output power using, the RMS power should not be higher
than the Maximum Output Power @ Convection cooling (load derating versus Input voltage, Operating temperature and Mounting position
should be considered).
RMS power is calculated using the following formula:
RMS power = ((peakpower^2 x T1 + reducedpower^2 x T2)/(T1 + T2))^1/2
Where T1 = peak power time on in seconds.
T2 = reduced power time on in seconds.