Technical Product Specification

Intel® Server System SR1690WB TPS 2BPower Sub-System
Revision 1.7 15
Intel order number: E72797-009
3.4.4.1 AC Line 5V
SB
Holdup
The 5 V
SB
output voltage will stay in regulation under its full load (static or dynamic) during
an AC dropout of 70 ms min (=5V
SB
holdup time) whether the power supply is in an ON or
OFF state (PSON asserted or de-asserted).
3.4.5 Power Recovery
The power supply will recover automatically after an AC power failure. AC power failure is
defined as any loss of AC power that exceeds the dropout criteria.
3.4.5.1 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 Requirements:
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 will tolerate a 3min ramp
from 90VAC voltage to 0VAC after the components have reached a steady state condition.
3.4.5.2 Voltage Interruptions
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.
3.4.6 AC Line Inrush
Cold Start (25 Deg C): Any additional inrush current surges or spikes in the form of AC
cycles or multiple AC must not exceed 40A peak for 1ms. You can ignore the in-rush spike
(<100us) due to the EMI filter capacitors.
Warm Start: Power supply shall not damage and the peak current shall be less than the
rating of its critical components including input fuse, bulk rectifier, and surge limits devices.
3.4.7 AC Line Leakage Current
The maximum leakage current to ground for each power supply is 1.0 mA when tested at
240 V
AC
60 Hz.
3.4.8 AC Line Fuse
The power supply has a single line fuse, on the Line (Hot) wire of the AC input. The line
fusing is acceptable for all safety agency requirements. The input fuse is a slow blow type.
AC inrush current will not cause the AC line fuse to blow under any conditions. All protection
circuits in the power supply will not cause the AC fuse to blow unless a component in the
power supply has failed. This includes DC output load short conditions.
3.4.9 Power Factor Correction
The power supply incorporates a Power Factor Correction circuit.
 The PFC must be 0.95 or greater for all specified AC input voltages with output loads
greater than 90%.
 The PFC must be 0.85 or greater for all specified AC input voltages with output loads
greater than 50%.