Intel SPSH4 Technical Product Specification page 40

Power supply Subsystem
Subsystem
PCI (32bit/33MHz)
System Total
Power Subsystem Spec
Margin
4.2.4.2 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 operates within the
specification shown in Table 19 over the full range of voltage drops from the power supply's
output connector to the remote sense points on the server system boardset.
4.2.4.3 DC and Transient Load Output Voltage Limit
The power supply will maintain regulation specified in Table 20 under all specified conditions,
including parallel operation with other power supplys, line variations, load variations, transient
load conditions, peak ripple/noise, maximum remote sense drops, subsystem hot swap, and
temperature change. The +3.3V, +5V, and +12V output voltages should be measured at their
respective remote sense points. The output voltages must stay within regulation requirements
with the remote sense regulating out the maximum drops shown in Table 19.
Table 20: Dynamic Tolerance Requirement
+3.3V
+5V
-12V
+12V
+5V standby
28
Qty +5V
2 6.00
32.54
64.60
32.06
Table 19: Remote Sense Drops
Output
+3.3V
+5V
+12V
Remote Sense return
Output Min. Output [V]
3.20
4.85
11.4
11.64
4.85
SPSH4 Server System External Product Specification
+3.3V +12V -12V
26.37 54.92 0.01
76.00 68.40 1.00
49.63 13.48 0.99
Max Drops Units
250 mV
250 mV
500 mV
100 mV
Max. Output [V]
3.43
5.20
13.08
12.48
5.20
+5VSB Total (W)
0.03 30.15
0.72 912.48
2.00 1140.00
1.28 227.52
Tolerance
+4% & -3 %
+4% & -3 %
+9 & -5%
+4% & -3 %
+4% & -3 %
Revision 1.11