Technical Product Specification

Intel® Server System P4000IP and Intel® Workstation System P4000CR Family TPS System Power Sub-system
42 Intel order number G38159-002 Revision 1.2
Table 35. Minimum Load Ratings
Parameter
Min
Max.
Peak 2, 3
Unit
12V main (200-
240VAC)
0.0
100
133
A
12V main (100-
127VAC)
0.0
83
110
A
12Vstby
1
0.0
3
3.5
A
Notes:
1. 12Vstby must provide 6A with two power supplies in parallel. The power supply fan is allowed to run in
standby mode for loads > 1.5A.
2. Length of time peak power can be supported is based on thermal sensor and assertion of the SMBAlert#
signal.
2.2.4.2 Pmax Power support
The PSU should support 3msec peak power duration at a 50msec period; 5.7% duty cycle,
Step loading from 1140W to 2200W, Average power = 1200W. High line only: 200-240VAC
2.2.4.3 Standby Output
The 12VSB output shall be present when an AC input greater than the power supply turn on
voltage is applied.
2.2.4.4 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 36. 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
2.2.4.5 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.