Technical Product Specification
Intel
®
Server Chassis P4000S Family TPS Chassis Power Sub-system
Revision 1.5 Intel order number G22850-006
49
Loading
100% of maximum
50% of maximum
20% of maximum
10% of maximum
Minimum Efficiency
88%
92%
88%
80%
The power supply must pass with enough margins to make sure in production all power supplies
meet these efficiency requirements.
2.3.4 DC Output Specification
2.3.4.1 Output Power/Currents
The following table defines the minimum power and current ratings. The power supply must
meet both static and dynamic voltage regulation requirements for all conditions.
Table 57. Minimum Load Ratings
Parameter
Min
Max.
Peak
2, 3
Unit
12V main
0.0
38.0
45.0
A
12Vstby
1
0.0
2.1
2.4
A
Notes:
1. 12Vstby must provide 4.0A with two power supplies in parallel. The Fan may start to work when stby current
>1.5A.
2. Peak combined power for all outputs shall not exceed 575W.
3. Length of time peak power can be supported is based on thermal sensor and assertion of the SMBAlert#.
signal. Minimum peak power duration shall be 20 seconds without asserting the SMBAlert# signal at
maximum operating temperature.
2.3.4.2 Standby Output
The 12VSB output shall be present when an AC input greater than the power supply turn on
voltage is applied. There should be load sharing in the standby rail. And two PSU modules
should be able to support 4A standby current.
2.3.4.3 Voltage Regulation
The power supply output voltages must 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 58. 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
2.3.4.4 Dynamic Loading
The output voltages shall remain within limits specified for the step loading and capacitive
loading specified in the table below. The load transient repetition rate shall be 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 59. Transient Load Requirements