Technical Product Specification

Power Sub-System IntelP
®
P Server System R1000JP Family TPS
3.2.6.5 AC Line Dropout/Holdup
An AC line dropout is defined to be when the AC input drops to 0VAC at any phase of the AC
line for any length of time. During an AC dropout, the power supply must meet dynamic voltage
regulation requirements. An AC line dropout of any duration shall not cause tripping of control
signals or protection circuits. If the AC dropout lasts longer than the holdup time, the power
supply should recover and meet all turn on requirements. The power supply shall meet the AC
dropout requirement over rated AC voltages and frequencies. A dropout of the AC line for any
duration should not cause damage to the power supply.
Loading
Holdup time
70%
12msec
3.2.6.6 AC Line 12VSB Holdup
The 12VSB output voltage should stay in regulation under its full load (static or dynamic) during
an AC dropout of 70ms min (=12VSB holdup time) whether the power supply is in ON or OFF
state (PSON asserted or de-asserted).
3.2.6.7 AC Line Fuse
The power supply shall have one line fused in the single line fuse on the line (Hot) wire of the
AC input. The line fusing must be acceptable for all safety agency requirements. The input fuse
should be a slow blow type. AC inrush current should not cause the AC line fuse to blow under
any conditions. All protection circuits in the power supply must not cause the AC fuse to blow,
unless a component in the power supply has failed. This includes DC output load short
conditions.
3.2.6.8 AC Inrush
AC line inrush current should not exceed 55A 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 shall be 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
).
3.2.6.9 AC Line Transient Specification
AC line transient conditions are defined as “sag” and “surge” conditions. “Sag” conditions are
also commonly referred to as “brownout”; these conditions are defined as the AC line voltage
dropping below nominal voltage conditions. “Surge” is defined to refer to conditions when the
AC line voltage rises above nominal voltage.
The power supply must meet the requirements under the following AC line sag and surge
conditions.
Table 24. AC Line Sag Transient Performance
AC Line Sag (10sec interval between each sagging)
Duration
Sag
Operating AC Voltage
Line Frequency
Performance Criteria
Revision 1.7
Intel order number: G71652-008
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