Power Sub-system Intel
®
Entry Server Chassis SC5299-E TPS
Revision 3.1
Intel order number D37594-005
30
Table 27. AC Line Dropout/Holdup
Output Wattage Loading Holdup Time
412.5 W 75% 20 msec
550 W 100% 12 msec
2.2.2.5.1 AC Line 5VSB Holdup
The 5VSB output voltage stays in regulation under its full load (static or dynamic) during an AC
dropout of 70-ms min (=5VSB holdup time) whether the power supply is in the ON or OFF state
(PSON asserted or de-asserted).
2.2.2.6 Power Recovery
The power supply recovers automatically after an AC power failure. AC power failure is defined
to be any loss of AC power that exceeds the dropout criteria.
2.2.2.6.1 Voltage Brown Out
The power supply complies with the limits defined in EN55024: 1998 using the IEC 61000-4-
11:1995 test standard and performance criteria C defined in Annex B of CISPR 24.
In addition, the power supply meets the following Intel Requirement:
A continuous input voltage below the nominal input range shall not damage the power supply or
cause overstress to any power supply component. The power supply must be able to return to
normal power up state after a brownout condition. Maximum input current under a continuous
brownout shall not blow the fuse. The power supply should tolerate a 3min ramp from 90VAC
voltage to 0VAC after the components have reached a steady state condition.
2.2.2.6.2 Voltage Interruptions
The power supply complies with the limits defined in EN55024: 1998 using the IEC 61000-4-
11:1995 and the level 3 test standard and performance criteria C defined in Annex B of CISPR
24.
2.2.2.7 AC Line Inrush
AC line inrush current does not exceed 50A peak for up to one-quarter of the AC cycle, after
which, the input current should be no more than the specified maximum input current. The peak
inrush current is less than the ratings of its critical components (including input fuse, bulk
rectifiers, and surge limiting device).
The power supply must meet the inrush requirements for any rated AC voltage, during turn on at
any phase of AC voltage, during a single cycle AC dropout condition, as well as upon recovery
after AC dropout of any duration, and over the specified temperature range (T
op
). It is
acceptable that AC line inrush current may reach up to 70A peak for up to 1 ms
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