CMP250 Series

www.xppower.com

26 Jan 18

AC-DC Power Supplies

Estimated Service Life vs Component 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 below for component locations.

The estimated service life of the CMP250 Series 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 capacitors within the product when installed in the end application. The worst case of the two figures below should be taken as the

indicative service life in 24/7 operation.

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

Temperature Measurements (At Ambient 50 °C)

Component

Max Temperature °C

PFC1 Coil

120 ° C

T1 Coil

120 ° C

C5

105 ° C

C3

105 ° C

BR1

130 ° C

L12

130 ° C

L13

130 ° C

Thermal Considerations

Service Life

PFC1

BR1

L13

L12

T1

C5

C3

C5 Temperature (°C)

C

0

20000

40000

60000

80000

100000

120000

140000

160000

180000

105

95

85

75

65

55

C3 Temperature (°C)

0

50000

100000

150000

200000

250000

105

95

85

75

65

55