Technical Product Specification

System Power Sub-system Intel® Server System P4000IP and Intel® Workstation System P4000CR Family TPS
Revision 1.2 Intel order number G38159-002
27
2.1.2.5 AC Line 12VSBHoldup
The 12VSB output voltage stays 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).
2.1.2.6 AC Line Fuse
The power supply has one line fused in the single line fuse on the line (Hot) wire of the AC
input. The line fusing is acceptable for all safety agency requirements. The input is a slow blow
type. AC inrush current does not cause the AC line fuse to blow under any conditions. All
protection circuits in the power supply does not cause the AC fuse to blow unless a component
in the power supply has failed. This includes DC output load short conditions.
2.1.2.7 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 is 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 meets the requirements under the following AC line sag and surge
conditions.
Table 13. AC Line Sag Transient Performance
AC Line Sag (10sec interval between each sagging)
Duration
Sag
Operating AC Voltage
Line Frequency
Performance Criteria
0 to 1/2 AC
cycle
95%
Nominal AC Voltage ranges
50/60Hz
No loss of function or performance
> 1 AC cycle
>30%
Nominal AC Voltage ranges
50/60Hz
Loss of function acceptable, self
recoverable
Table 14. AC Line Surge Transient Performance
AC Line Surge
Duration
Surge
Operating AC Voltage
Line Frequency
Performance Criteria
Continuous
10%
Nominal AC Voltages
50/60Hz
No loss of function or performance
0 to ½ AC
cycle
30%
Mid-point of nominal AC
Voltages
50/60Hz
No loss of function or performance
2.1.2.8 Power Recovery
The power supply shall recover automatically after an AC power failure. AC power failure is
defined to be any loss of AC power that exceeds the dropout criteria.