Intel P4000RP Technical Product Specification - Page 221
Dynamic Loading, Capacitive Loading, Grounding, Residual Voltage Immunity in Standy mode
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Intel® Server Board S1200V3RP Server Board Power Distribution 13.1.5 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 MIN load to the MAX load conditions. Table 66. Transient Load Requirements Output +3.3V ∆ Step Load Size (See note 2) 6.0A Load Slow Rate 0.5 A/µsec +5V 4.0A 0.5 A/µsec 12V1+12V2 18.0A 0.5 A/µsec +5VSB 0.5A 0.5 A/µsec Note: 1. Step loads on each 12V output may happen simultaneously. Test capacitive Load 970 µF 400 µF 2200 µF 1,2 20 µF 2. The +12V should be tested with 2200µF evenly split between the four +12V rails. 13.1.6 Capacitive Loading The power supply is stable and meets all requirements with the following capacitive loading ranges. Table 67. Capacitive Loading Conditions Output +3.3V +5V +12V -12V +5VSB MIN 250 400 500 1 20 MAX 5000 5000 8000 350 350 Units µF µF µF µF µF 13.1.7 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 max 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 mΩ. This path may be used to carry DC current. 13.1.8 Residual Voltage Immunity in Standy mode The power supply is immune to any residual voltage placed on its outputs (Typically a leakage voltage through the system from standby output) up to 500mV. There is neither additional heat generated, nor stressing of any internal components with this voltage applied to any individual or all outputs simultaneously. It also does not trip the protection circuits during turn on. Revision 1.0 209