Intel SC5299WS User Manual
Power Sub-system
Intel
®
Entry Server Chassis SC5299-E TPS
Revision
3.1
Intel order number D37594-005
94
2.5.7.12
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.
to be any loss of AC power that exceeds the dropout criteria.
2.5.7.12.1
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.
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:
o
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.
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.
2.5.7.12.2
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.
11:1995 test standard and performance criteria C defined in Annex B of CISPR 24.
2.5.7.13
AC Line Isolation Requirements
The power supply meets all safety agency requirements for dielectric strength. Transformers’
isolation between primary and secondary windings complies with the 3000Vac (4242Vdc)
dielectric strength criteria. In addition, the insulation system complies with reinforced insulation
per safety standard IEC 950. Separation between the primary and secondary circuits, and
primary to ground circuits, complies with the IEC 950 spacing requirements.
isolation between primary and secondary windings complies with the 3000Vac (4242Vdc)
dielectric strength criteria. In addition, the insulation system complies with reinforced insulation
per safety standard IEC 950. Separation between the primary and secondary circuits, and
primary to ground circuits, complies with the IEC 950 spacing requirements.
2.5.8
DC Output Specifications
2.5.8.1
Grounding
The output ground of the pins of the power supply provides the power return path. The output
connector ground pins are connected to safety ground (power supply enclosure). This
grounding is designed to ensure passing the maximum allowed common mode noise levels.
connector ground pins are connected to safety ground (power supply enclosure). This
grounding is designed to ensure passing the maximum allowed common mode noise levels.
2.5.8.2
Remote Sense
The power supply has remote sense return (ReturnS) to regulate out ground drops for all output
voltages: +3.3V, +5V, +12V1, +12V2, +12V3, +12V4, -12V, and 5VSB. The power supply uses
remote sense to regulate out drops in the system for the +3.3V, +5V, and 12V1 outputs. The
+12V1, +12V2, +12V3, +2V4, –12V and 5VSB outputs only use remote sense referenced to the
ReturnS signal. The remote sense input impedance to the power supply is greater than 200
voltages: +3.3V, +5V, +12V1, +12V2, +12V3, +12V4, -12V, and 5VSB. The power supply uses
remote sense to regulate out drops in the system for the +3.3V, +5V, and 12V1 outputs. The
+12V1, +12V2, +12V3, +2V4, –12V and 5VSB outputs only use remote sense referenced to the
ReturnS signal. The remote sense input impedance to the power supply is greater than 200
.
This is the value of the resistor connecting the remote sense to the output voltage internal to the
power supply. Remote sense is able to regulate out a minimum of a 200mV drop. The remote
sense return (ReturnS) is able to regulate out a minimum of a 200mV drop in the power ground
return. The current in any remote sense line is less than 5mA to prevent voltage sensing errors.
power supply. Remote sense is able to regulate out a minimum of a 200mV drop. The remote
sense return (ReturnS) is able to regulate out a minimum of a 200mV drop in the power ground
return. The current in any remote sense line is less than 5mA to prevent voltage sensing errors.