Technical Product Specification
Chassis Power Sub-system Intel
®
Server Chassis P4000S Family TPS
Intel order number G22850-006 Revision 1.5
38
Parameter
Tolerance
Min
Nom
Max
Units
+12V2
- 4%/+5%
+11.52
+12.00
+12.60
Vrms
+12V3
- 4%/+5%
+11.52
+12.00
+12.60
Vrms
- 12V
- 10%/+10%
- 13.20
-12.00
-10.80
Vrms
+5VSB
- 4%/+5%
+4.80
+5.00
+5.25
Vrms
2.2.5.5 Dynamic Loading
The output voltages remain 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 41. Transient Load Requirements
Output
Step Load Size
(See note 2)
Load Slew Rate
Test capacitive Load
+3.3V
6.0A
0.5 A/sec
970 F
+5V
4.0A
0.5 A/sec
400 F
12V1+12V2 +12V3
23.0A
0.5 A/sec
2200 F
1,2
+5VSB
0.5A
0.5 A/sec
20 F
Notes:
1. Step loads on each 12V output may happen simultaneously.
2. The +12V should be tested with 2200F evenly split between the four +12V rails.
3. This will be tested over the range of load conditions in section 2.1.6.2.
2.2.5.6 Capacitive Loading
The power supply is stable and meets all requirements with the following capacitive loading
ranges.
Table 42. Capacitive Loading Conditions
Output
Min
Max
Units
+3.3V
250
5000
F
+5V
400
5000
F
+12V
500
8000
F
-12V
1
350
F
+5VSB
20
350
F
2.2.5.7 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.
The power supply is provided with a reliable protective earth ground. All secondary circuits are
connected to protective earth ground. Resistance of the ground returns to chassis does not
exceed 1.0 m. This path may be used to carry DC current.