Intel SLWBR Product Specification - Page 9

Intel© LB440GX 2U Rack Server Chassis TPS Rev 1.0 3 Chassis Power Subsystem This chassis uses a single standard PS/2 form factor power supply. Variations may be chosen for future board sets to satisfy the chassis power, power distribution, thermal performance, acoustic noise and cost requirements. The form factor was chosen to optimize the overall chassis dimensions. The typical PS/2 form factor power supply with a remote enable feature can be used. The remote enable feature permits the chassis power to be activated from a variety of sources, allowing the implementation of "Wake On LAN*" (WOL) or other remote management features. The 300-watt PFC (Power Factor Correction) power supply features a 24-pin main power connector and a 6-pin Auxiliary ATX power connector. The following table is a brief overview: ATX 300W Non-PFC 719680002 +5 VDC Output +12 VDC Output -12 VDC Output -5 VDC Output +3.3 VDC Output +5 VDC Standby Output balancing AC Line Voltage AC Line Frequency AC Input Current P/S Rating, Maximum Continuous Current 26 Amp Max 10 Amp Max 0.5 Amp Max 0.25 Amp Max 16 Amp Max 800mA Max Total combined output power of +3.3V and +5V shall not exceed 167 W. Autorange 50/60 Hz 4.6 Amp at 115 VAC 2.3 Amp at 220 VAC Table 2. Power Supply Output Summary 3.1 Mechanical Outline The mechanical outline and dimensions of the power supply adhere to the standard PS/2 Form factor. The approximate dimensions are: 140mm high x 86mm wide x 150mm deep. 3.2 Fan Requirements The power supply incorporates an 80mm low-acoustic-noise fan to exhaust air. The sound pressure level is measured at a distance of 0.1 meter from each side of the power supply in a free field. The worst-case peak value of the measurements shall not exceed 38 dBA at 23°C ± 2°C. Due to the increased output requirements of the 5V standby circuit, power supply thermal margins are difficult to maintain while the system is in the "off" state. For this reason, the power supply fan will run at a reduced RPM when the system is off. 3.3 AC Power Line The power supply is specified to operate from 100-120VAC, 200-240VAC, at 50 or 60Hz and is auto- ranging. The power supply is tested to meet these voltages, and has been tested (but not specified) in a configured system at ± 10% of the voltage ranges, and similarly ± 3Hz on the line input frequency. The power supply, in a configured system, is specified to operate without error at full power supply 4