Intel BB5520UR Product Specification - Page 146

Design and Environmental Specifications Intel® Server Boards S5520HC, S5500HCV, and S5520HCT TPS 9.4.3 Remote Sense The power supply should have remote sense return (ReturnS) to regulate out ground drops for all output voltages: +3.3 V, +5 V, +12 V1, +12 V2, +12 V3, +12 V4, -12 V, and 5 VSB. The power supply should use remote sense to regulate out drops in the system for the +3.3 V, +5 V, and +12 V1 outputs. The +12 V1, +12 V2, +12 V3, +12 V4, -12 V, and 5V SB outputs only use remote sense referenced to the ReturnS signal. The remote sense input impedance to the power supply must be greater than 200 Ω on 3.3 VS and 5 VS. This is the value of the resistor connecting the remote sense to the output voltage internal to the power supply. Remote sense must be able to regulate out a minimum of 200 mV drop. The remote sense return (ReturnS) must be able to regulate out a minimum of 20 0mV drop in the power ground return. The current in any remote sense line should be less than 5 mA to prevent voltage sensing errors. The power supply must operate within specification over the full range of voltage drops from the power supply's output connector to the remote sense points. 9.4.4 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. All outputs are measured with reference to the return remote sense signal (ReturnS). The +12 V3, +12 V4, -12 V and 5 VSB outputs are measured at the power supply connectors referenced to ReturnS. The +3.3 V, +5 V, +12 V1, and +12 V2 are measured at its remote sense signal located at the signal connector. Table 75. Voltage Regulation Limits Parameter +3.3 V +5 V +12 V 1 +12 V 2 +12 V 3 +12 V 4 - 12 V +5 VSB Tolerance - 5%/+5% - 5%/+5% - 5%/+5% - 5%/+5% - 5%/+5% - 5%/+5% - 5%/+9% - 5%/+5% Minimum +3.14V +4.75V +11.40V +11.40V +11.40V +11.40V - 11.40V +4.75V Nominal +3.30V +5.00V +12.00V +12.00V +12.00V +12.00V -12.00V +5.00V Maximum +3.46V +5.25V +12.60V +12.60V +12.60V +12.60V -13.08V +5.25V Units Vrms Vrms Vrms Vrms Vrms Vrms Vrms Vrms 9.4.5 Dynamic Loading The output voltages remain within limits for the step loading and capacitive loading specified in the following table. You should test the load transient repetition rate between 50 Hz and 5 kHz at duty cycles ranging from 10% to 90%. The load transient repetition rate is only a test specification. The Δ step load may occur anywhere within the minimum load to the maximum load range. 132 Revision 1.8 Intel order number E39529-013