Intel Server Board S1200BT - PROconsult Data A/S

Design and Environmental Specifications
Intel® Server Board S1200BT TPS
Output
∆ Step Load Size
Load Slew Rate
Test capacitive Load
(See note 2)
+5 VSB 0.5 A 0.25 A/µsec 20 µF
Note:
Step loads on each 12 V output may happen simultaneously and should be tested that way.
10.3.6 Capacitive Loading
The power supply is stable and meets all requirements with the following capacitive
loading ranges.
10.3.7 Closed-loop Stability
Table 50. Capacitve Loading Conditions
Output Minimum Maximum Units
+3.3 V 100 2200 µF
+5 V 400 2200 µF
+12 V 500 2200 µF
-12 V 1 350 µF
+5 VSB 20 350 µF
The power supply is unconditionally stable under all line/load/transient load conditions including
capacitive load ranges. A minimum of 45°phase margin and -10 dB-gain margin is required.
The power supply manufacturer provides proof of the unit‘s closed-loop stability with local
sensing through the submission of Bode plots. Closed-loop stability is ensured at the maximum
and minimum loads as applicable.
10.3.8 Common Mode Noise
The Common Mode noise on any output does not exceed 350 mV pk-pk over the frequency
band of 10 Hz to 20 MHz.
• 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 setup uses a FET probe such as Tektronix* model P6046 or equivalent.
10.3.9 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 0 Hz to 20 MHz at the power supply output connectors. A
10 F tantalum capacitor is placed in parallel with a 0.1 F ceramic capacitor at the point of
measurement.
Table 51. Ripple and Noise
+3.3 V +5 V +12 V -12 V +5 VSB
50 mVp-p 50 mVp-p 120 mVp-p 120 mVp-p 50 mVp-p
10.3.10 Timing Requirements
The timing requirements for the power supply operation are as follows:
114
Intel order number G13326-003
Revision 1.0