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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 719680-
+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
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
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
frequency.
The power supply, in a configured system, is specified to operate without error at full power supply
P/S Rating, Maximum Continuous
002
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
10% of the voltage ranges, and similarly
4
Current
2 C.
3Hz on the line input
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