Intel EPS1U Benutzerhandbuch
SSI
EPS1U Power Supply Design Guide, V1.1
6.2 Grounding
STATUS
Required
The ground of the pins of the power supply wire harness provides the power return path. The wire harness
ground pins shall be connected to safety ground (power supply enclosure).
ground pins shall be connected to safety ground (power supply enclosure).
6.3 Remote Sense
STATUS
Optional
The power supply may have remote sense return (ReturnS) to regulate out ground drops for all output voltages;
+3.3 V, +5 V, +12 V1, +12 V2, -12 V, and 5 VSB. The power supply may use remote sense (3.3VS) to regulate
out drops in the system for the +3.3 V output. The +5 V, +12 V1, +12 V2, –12 V, and 5 VSB outputs only use
remote sense referenced to the ReturnS signal. The remote sense input impedance to the power supply must be
greater than 200
+3.3 V, +5 V, +12 V1, +12 V2, -12 V, and 5 VSB. The power supply may use remote sense (3.3VS) to regulate
out drops in the system for the +3.3 V output. The +5 V, +12 V1, +12 V2, –12 V, and 5 VSB outputs only use
remote sense referenced to the ReturnS signal. The remote sense input impedance to the power supply must be
greater than 200
Ω
on 3.3 VS and ReturnS. This is the value of the resistor connecting the remote sense to the
output voltage internal to the power supply. Remote sense must be able to regulate out a minimum of 200 mV
drop on the +3.3 V output. The remote sense return (ReturnS) must be able to regulate out a minimum of 200 mV
drop in the power ground return. The current in any remote sense line shall be less than 5 mA to prevent voltage
sensing errors. The power supply must operate within specification over the full range of voltage drops from the
power supply’s output connector to the remote sense points.
drop on the +3.3 V output. The remote sense return (ReturnS) must be able to regulate out a minimum of 200 mV
drop in the power ground return. The current in any remote sense line shall be less than 5 mA to prevent voltage
sensing errors. The power supply must operate within specification over the full range of voltage drops from the
power supply’s output connector to the remote sense points.
6.4 Output Power/Currents
The following tables define three power and current ratings for a 125W, 250 W and a 350 W power supply. These
were selected to cover different types of systems and configurations. The 125W power level is targeted for use in
“today’s” low power server systems. The 250W power level is targeted for use in “today’s” higher power 1U
server systems. The 350W power level is directed at “tomorrow’s” higher power 1U server systems. The
combined output power of all outputs shall not exceed the rated output power. The tables show the load ranges
for each of the two power supply power levels. The power supply must meet both static and dynamic voltage
regulation requirements for the minimum loading conditions.
were selected to cover different types of systems and configurations. The 125W power level is targeted for use in
“today’s” low power server systems. The 250W power level is targeted for use in “today’s” higher power 1U
server systems. The 350W power level is directed at “tomorrow’s” higher power 1U server systems. The
combined output power of all outputs shall not exceed the rated output power. The tables show the load ranges
for each of the two power supply power levels. The power supply must meet both static and dynamic voltage
regulation requirements for the minimum loading conditions.