Intel SC5299WS User Manual
Power Sub-system
Intel
®
Entry Server Chassis SC5299-E TPS
Revision
3.1
Intel order number D37594-005
54
2.3.3.8
Capacitive Loading
The power supply is stable and meets all requirements with the following capacitive loading
ranges. Minimum capacitive loading applies to static load only.
ranges. Minimum capacitive loading applies to static load only.
Table 61. Capacitive Loading Conditions
Output
MIN
MAX
Units
+12V 2000
11,000
F
+5VSB 1
350
F
2.3.3.9
Closed Loop Stability
The power supply is unconditionally stable under all line/load/transient load conditions, including
capacitive load ranges. A minimum of 45 degrees phase margin and -10dB-gain margin are
met. Closed-loop stability is ensured at the maximum and minimum loads, as applicable.
capacitive load ranges. A minimum of 45 degrees phase margin and -10dB-gain margin are
met. Closed-loop stability is ensured at the maximum and minimum loads, as applicable.
2.3.3.10
Common Mode Noise
The common mode noise on any output does not exceed 350mV pk-pk over the frequency band
of 10Hz to 20MHz.
of 10Hz to 20MHz.
2.3.3.11
Ripple/Noise
The maximum ripple/noise output of the power supply is defined in the following table. This is
measured over a bandwidth of 0Hz to 20MHz at the power supply output connectors. A 10
measured over a bandwidth of 0Hz to 20MHz at the power supply output connectors. A 10
F
tantalum capacitor in parallel with a 0.1
F ceramic capacitor is placed at the point of
measurement.
Table 62. Ripple and Noise
+12V Output
+5VSB Output
120mVp-p 50mVp-p
2.3.3.12
Forced Load Sharing
The +12V output has forced load sharing. The output shares within 10% at full load. All current
sharing functions are implemented internal to the power supply by making use of the 12LS
signal. The power distribution board connects the 12LS signal between the two power supplies.
The failure of a power supply does not affect the load sharing or output voltages of the other
supplies still operating. The supplies are able to load share with up to 2 power supplies in
parallel and operate in a hot-swap/redundant 1+1 configuration. The 5Vsb output is not required
to actively share current between power supplies (passive sharing). The 5Vsb outputs 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.
sharing functions are implemented internal to the power supply by making use of the 12LS
signal. The power distribution board connects the 12LS signal between the two power supplies.
The failure of a power supply does not affect the load sharing or output voltages of the other
supplies still operating. The supplies are able to load share with up to 2 power supplies in
parallel and operate in a hot-swap/redundant 1+1 configuration. The 5Vsb output is not required
to actively share current between power supplies (passive sharing). The 5Vsb outputs 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.