Thermal Considerations

In Order to ensure safe operation of the PSU in the end-use equipment, the temperature of the components listed in the table below must not be

exceeded. Temperature should be monitored using K type thermocouples placed on the hottest part of the component (out of direct air flow). See

Mechanical Details for component locations.

Service Life

The estimated service life of the ECP150 is determined by the cooling arrangements and load conditions experienced in the end application. Due to the

uncertain nature of the end application this estimated service life is based on the actual measured temperature of key capacitors within the product

when installed in the end application.

The graph below expresses the estimated lifetime given component temperature and assumes continuous operation at this temperature.

Estimated Service Life vs Component Temperature

Temperature Measurements (At Maximum Ambient)

Component

Max Temperature °C

TR1 Coil

110°C

L4 Coil

120°C

Q1 Body

120°C

Q2 Body

120°C

C1

105°C

C20

105°C

0

10000

20000

30000

40000

50000

C1 & C20 Temperature (ºC)

60000

70000

105

95

85

75

65

55

C1

C20

Thermal Considerations

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Figure 11

18-Nov-13