Intel SC5650BCDP User Manual
Intel
®
Server System SC5650BCDP TPS
Power Sub-System
Revision 1.5
Intel order number: E80367-002
23
3.1.5.8
Capacitive Loading
The power supply is stable and meets all requirements with the following capacitive loading
ranges.
ranges.
Table 21. Capacitive Loading Conditions
Output
MIN
MAX
Units
+3.3V 10 12,000
μF
+5V 10
12,000
μF
+12V(1, 2, 3)
500 each
11,000
μF
+12V4 10 500
μF
-12V 1 350
μF
+5VSB 20 350
μF
3.1.5.9
Closed Loop Stability
The power supply is unconditionally stable under all line/load/transient load conditions, including
capacitive load ranges in Section 2.1.5.8. A minimum of a 45-degree phase margin and -10dB-
gain margin is required. Closed-loop stability is ensured at the maximum and minimum loads as
applicable.
capacitive load ranges in Section 2.1.5.8. A minimum of a 45-degree phase margin and -10dB-
gain margin is required. Closed-loop stability is ensured at the maximum and minimum loads as
applicable.
3.1.5.10
Residual Voltage Immunity in Standby Mode
The power supply is immune to any residual voltage placed on its outputs (typically a leakage
voltage through the system from standby output) up to 500mV. There is neither additional heat
generated, nor stressing of any internal components with this voltage applied to any individual
output or all outputs simultaneously. Residual voltage also does not trip the protection circuits
during turn on/off.
voltage through the system from standby output) up to 500mV. There is neither additional heat
generated, nor stressing of any internal components with this voltage applied to any individual
output or all outputs simultaneously. Residual voltage also does not trip the protection circuits
during turn on/off.
The residual voltage at the power supply outputs for a no-load condition does not exceed
100mV when AC voltage is applied.
100mV when AC voltage is applied.
3.1.5.11
Common Mode Noise
The Common Mode noise on any output does not exceed 350mV pk-pk over the frequency
band of 10Hz to 30MHz.The measurement is made across a 100Ω resistor between each of the
DC outputs, including ground at the DC power connector and chassis ground (power subsystem
enclosure). The test set-up uses a FET probe, such as a Tektronix* P6046, or equivalent.
band of 10Hz to 30MHz.The measurement is made across a 100Ω resistor between each of the
DC outputs, including ground at the DC power connector and chassis ground (power subsystem
enclosure). The test set-up uses a FET probe, such as a Tektronix* P6046, or equivalent.
3.1.5.12
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 10 Hz to 20 MHz at the power supply output connectors.
A 10
This is measured over a bandwidth of 10 Hz to 20 MHz at the power supply output connectors.
A 10
μF tantalum capacitor in parallel with a 0.1μF ceramic capacitor is placed at the point of
measurement.