Technical Product Specification
System Power Sub-system Intel® Server System P4000IP and Intel® Workstation System P4000CR Family TPS
Revision 1.2 Intel order number G38159-002
55
2.3.4 DC Output Specification
2.3.4.1 Output Power/Currents
The following tables define the minimum power and current ratings. The power supply must
meet both static and dynamic voltage regulation requirements for all conditions.
Table 56. Minimum Load Ratings
Parameter
Min
Max.
Peak 2, 3
Unit
12V main (200-240VAC)
0.0
133
175
A
12V main (100-127VAC)
0.0
83
110
A
12Vstby 1
0.0
3.5
4.0
A
Notes:
1. 12Vstby must be able to provide 4.0A peak load with single power supply.The power supply fan is allowed
to run in standby mode for loads > 1.5A.
2. Peak combined power for all outputs shall not exceed 2100W.
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.
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.
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 57. 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 MIN load to the MAX load
conditions.
Table 58. Transient Load Requirements
Output
Step Load Size
(See note 2)
Load Slew Rate
Test capacitive Load
+12VSB
1.0A
0.25 A/sec
20 F
+12V
60% of max load
0.25 A/sec
2000 F