Intel® Server Board S3420GP TPS Design and Environmental Specifications
Revision 2.4
Intel order number E65697-010
99
10.4 Power Supply Output Requirements
This section is for reference purposes only. The intent is to provide guidance to system
designers to determine a power supply for use with this server board. This section specifies the
power supply requirements Intel used to develop a power supply for the Intel
®
Server System
SR1630GP and SR1630HGP.
The following tables define two power and current ratings for this 350-W power supply. The
combined output power of all outputs should not exceed the rated output power. The power
supply must meet both static and dynamic voltage regulation requirements for the minimum
loading conditions.
Table 64. 350-W Load Ratings
Voltage Minimum Continuous
Maximum Continuous
Peak
+3.3 V 0.2A 14 A
+5 V 1.0 A 18A
+12 V 1.5A 24 A 28A
-12 V 0A 0.3A
+5 VSB 0.1 A 2.0 A 2.5 A
Notes:
1. Maximum continuous total DC output power should not exceed 350 W.
2. Peak total DC output power should not exceed 400 W.
3. Peak power and peak current loading should be supported for a minimum of 12 seconds.
4. Combined 3.3 V/5 V power should not exceed 100 W.
10.4.1 Grounding
The grounds of the power supply output connector pins provide the power return path. The
output connector ground pins are connected to the safety ground (power supply enclosure).
This grounding is designed to ensure passing the maximum allowed common mode noise levels.
The power supply is provided with a reliable protective earth ground. All secondary circuits are
connected to protective earth ground. Resistance of the ground returns to chassis does not
exceed 1.0 m. This path may be used to carry DC current.
10.4.2 Standby Outputs
The 5 VSB output is present when an AC input greater than the power supply turn on voltage is
applied.
10.4.3 Remote Sense
The power supply has remote sense return (ReturnS) to regulate out ground drops for all output
voltages: +3.3 V, +5 V, +12 V, -12 V, and 5 VSB. The power supply uses remote sense to
regulate out drops in the system for the +3.3 V, +5 V, and 12 V outputs. 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.
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