ECH450 Series

AC-DC Power Supplies

11

www.xppower.com

26 March 20

Figure 6

Estimated Service Life vs Component Temperature

0

10000

20000

30000

40000

50000

C5 + C39 Temperature (ºC)

C39

C5

60000

70000

80000

105

95

85

75

65

55

45

Service Life

The estimated service life of the ECH450 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 a key capacitor

with in the product when installed by the end application,

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

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 Standard Open Frame Mechanical Details on page 5 for component locations.

Temperature Measurements (At Maximum Ambient)

Component

Max Temperature °C

T3 Coil

110°C

L3 Coil

120°C

Q3 Body

120°C

C5

105°C

C39

105°C

Thermal Considerations

To turn output off, connect Remote On/Off, Pin 3 to return, Pin 2.

Output is on if Remote On/Off, Pin 3 is floating or connected to

5V standby, Pin 1.

CN202 - Signal Connection

Pin 1

+5 V standby

Pin 2

Return

Pin 3

Remote On/Off

Remote On/Off