Intel® Server Chassis SC1400UP / Intel® Server Platform SR1425BK1-E
Revision 1.0
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6.20 Grounding
The ground of the pins of the power supply output connector provides the power return path.
The output connector ground pins are connected to safety ground (power supply enclosure).
The power supply provides a reliable protective earth ground. All secondary circuits are
connected to the protective earth ground. Resistance of the ground returns to chassis does not
exceed 1.0 m
Ω
. This path may be used to carry DC current.
6.21 Remote Sense
The power supply has remote sense return (ReturnS) to regulate out ground drops for all output
voltages; +3.3V, +5V, +12V, -12V, and 5VSB. The power supply uses remote sense (3.3VS) to
regulate out drops in the system for the +3.3V output. The +5V, +12V, –12V and 5VSB 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 3.3VS, 5VS. 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 200mV drop on the +3.3V output. The remote sense
return (ReturnS) must be able to regulate out a minimum of 200mV drop in the power ground
return. The current in any remote sense line shall be less than 5mA 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.
6.22 Output Power / Currents
The following table defines power and current ratings for this 300W power supply. The
combined output power of all outputs shall not exceed the rated output power. The power
supply must meet both static and dynamic voltage regulation requirements for the minimum
loading conditions.
Table 31. Load Ratings
Voltage
Minimum Continuous
Load
Maximum Continuous Load
Peak Load
+3.3V
1.5 A
14 A
+5V
1.0 A
18 A
+12V
1A
20 A (note 3)
24.0 A (note 5)
-12V
0 A
0.3 A
+5VSB
0.1 A
2.0 A
Table 32. Load Range 2
Voltage
Minimum Continuous
Load
Maximum Continuous Load
Peak Load
+3.3V 0.2A
5.0
A
+5V
0.2 A
5.0 A
+12V 0.2A
8.0A
-12V
0 A
0.3 A
+5VSB
0.1 A
2.0 A