Spire corp – Spire JEWEL 550W / SP-ATX-550W-PFC User Manual
Page 15
Version:A/0 Page 15 of 17
Spire Corp.
Http://www.spirepower.com & Http://www.spirecoolers.com
Http://www.spire-corp.com
6 Reliability
6.1 Component Derating
The following component derating guedelines are recommended:
‧
Semiconductor junction temperatrues shall not exceed 110℃ with an ambient
of 50℃.
‧
Inductor case temperature shall not exceed safety agency requirements.
‧
Capacitor case temperature shall not exceed 95% of rated temperature.
‧
Component voltage and current derating shall be >10% at 50℃.
‧
Magnetic saturation of any transformer will not be allowed under any line, load,
startup or transient condition including 100% transients on the five main outputs or
+5VSB.
6.2 Mean Time Between Failures(MTBF)
The power supply reliability is based on the calculation with the Part-Stress Analysis
method of MIL-HDBK-217F using the quality factors listed in
MIL-HDBK-217F. The power supply MTBF is 100,000 hours under the
following conditions:
- Full-rated
load
- 230VAC
input
- Ground
begin
- 25℃ ambient
7.Correlative Certification compliance
Item #
Certification type
Certification Number
Certification listing
Remark
1 CE/EMC
TMC20110425EC01
WWW.TMC-LAB.C
OM
CE/LVD
TMC20110425SC01
WWW.TMC-LAB.C
OM