Power Supply Specification Guidelines
Intel® Server Board S2600CW Family TPS
128
Revision 2.4
10.2.4.3
Voltage Regulation
The power supply output voltages stay within the following voltage limits when operating at
steady state and dynamic loading conditions. These limits include the peak-peak ripple/noise.
These shall be measured at the output connectors.
Table 51. Voltage Regulation Limits
Parameter
Tolerance
Min
Nom
Max
Units
+12V
-5%/+5%
+11.40
+12.00
+12.60
V
rms
+12V stby
-5%/+5%
+11.40
+12.00
+12.60
V
rms
10.2.4.4
Dynamic Loading
The output voltages remains within limits specified for the step loading and capacitive loading
specified in the table below. The load transient repetition rate is tested between 50Hz and
5kHz at duty cycles ranging from 10%-90%. The load transient repetition rate is only a test
specification. The
∆
step load may occur anywhere within the minimum load to the maximum
load conditions.
Table 52. Transient Load Requirements
Output
∆
Step Load Size
(See note 2)
Load Slew Rate
Test Capacitive Load
+12VSB
1.0A
0.25 A/
µ
sec
20
µ
F
+12V
60% of max load
0.25 A/
µ
sec
2000
µ
F
Note
: For dynamic con12V min loading is 1A.
10.2.4.5
Capacitive Loading
The power supply is stable and meets all requirements with the following capacitive loading
ranges.
Table 53. Capacitive Loading Conditions
Output
Min
Max
Units
+12VSB
20
3100
µ
F
+12V
500
25000
µ
F
10.2.4.6
Grounding
The output ground of the pins of the power supply provides the output power return path.
The output connector ground pins are connected to the safety ground (power supply
enclosure). This grounding is well designed to ensure passing the maximum allowed Common
Mode Noise levels.
