Technical Product Specification

Power Supply Specification Guidelines Intel
®
Server Board S2600WP TPS
additional heat generated, nor stressing of any internal components with this voltage applied to
any individual or all outputs simultaneously. It also should not trip the protection circuits during
turn on.
The residual voltage at the power supply outputs for no load condition shall not exceed 100mV
when AC voltage is applied and the PSON# signal is de-asserted.
10.2.9
Common Mode Noise
The Common Mode noise on any output shall not exceed 350mV pk-pk over the frequency
band of 10Hz to 20MHz.
10.2.10
Soft Starting
The Power Supply shall contain control circuit which provides monotonic soft start for its outputs
without overstress of the AC line or any power supply components at any specified AC line or
load conditions.
10.2.11
Zero Load Stability Requirements
When the power subsystem operates in a no load condition, it does not need to meet the output
regulation specification, but it must operate without any tripping of over-voltage or other fault
circuitry. When the power subsystem is subsequently loaded, it must begin to regulate and
source current without fault.
10.2.12
Hot Swap Requirements
Hot swapping a power supply is the process of inserting and extracting a power supply from an
operating power system.
During this process, the output voltages shall remain within the limits
with the capacitive load specified.
The hot swap test must be conducted when the system is
operating under static, dynamic, and zero loading conditions.
10.2.13
Forced Load Sharing
The +12V output will have active load sharing. The output will share within 10% at full load. The
failure of a power supply should not affect the load sharing or output voltages of the other
supplies still operating.
The supplies must be able to load share in parallel and operate in a hot-
swap/redundant 1+1 configurations.
The 12VSBoutput is not required to actively share current
between power supplies (passive sharing).
The 12VSBoutput of the power supplies are
connected together in the system, so that a failure or hot swap of a redundant power supply
does not cause these outputs to go out of regulation in the system.
10.2.14
Ripple/Noise
The maximum allowed ripple/noise output of the power supply is defined in the following table.
This is measured over a bandwidth of 10Hz to 20MHz at the power supply output connectors. A
10µF tantalum capacitor in parallel with a 0.1µF ceramic capacitor is placed at the point
of measurement.
Table 96. Ripples and Noise
+12V main
+5VSB
120mVp-p
50mVp-p
10.2.15
Timing Reuqirement
These are the timing requirements for the power supply operation. The output voltages must rise
from 10% to within regulation limits (T
vout_rise
) within 5 to 70ms. For 5VSB, it is allowed to rise
Intel order number G44057-007 Revision 1.6
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