Power and Environmental Specifications Intel
®
Server Board S5500BC TPS
Intel order number: E42249-009 Revision 1.8
Note: The grounding should be well designed to ensure passing the maximum allowed common
mode noise levels.
9.2.4 Standby Outputs
The 5 VSB output should be present when an AC input greater than the power supply turn on
voltage is applied.
9.2.5 Remote Sense
The power supply has remote sense return (ReturnS) to regulate out ground drops for all output
voltages; +3.3V, +5V, +12V1, +12V2, -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, +12V1, +12V2, 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 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
9.2.6 Fan Operation in Standby Mode
The power supply fans must continue to operate at their lowest speed when in standby mode.
9.2.7 Voltage Regulation
The power supply output voltages must remain within the following limits when operating at
steady state and dynamic loading conditions. These limits include the peak-peak ripple/noise.
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