Lenovo PC 300PL Technical Information Manual for IBM PC300GL (Type 6563, 6564, - Page 32

Chapter 4. Power supply Power input A 145-watt power supply drives your computer. The power supply provides 3.3-volt power for the Pentium III microprocessor, core chip set, and 5-volt power for PCI adapters. Also included is an auxiliary 5-volt (AUX 5) power supply to provide power to power-management circuitry and a Wake on LAN adapter. The power supply converts the ac input voltage into four dc output voltages and provides power for the following: • System board • Adapters • Internal drives • Keyboard and auxiliary devices • USB devices A logic signal on the power connector controls the power supply; the front panel switch is not directly connected to the power supply. The power supply connects to the system board with a 2 x 10 pin connector. The following table shows the power input specifications. The power supply has a manual switch to select the correct input voltage. Table 8. Power input requirements Specification Input voltage, low range Input voltage, high range Input frequency Measurements 100 (min) to 127 (max) V ac 200 (min) to 240 (max) V ac 50 Hz ± 3 Hz or 60 Hz ± 3 Hz Power output The following figures show the power supply output of all the connectors, including the system board, DASD, PCI, and auxiliary outputs. Table 9. Power output (145 watts) Output voltage Tolerance +5 V dc +5% to -5% +12 V dc +5% to -5% -12 V dc +10% to -10% +3.3 V dc +5% to -5% +5 V ac (auxiliary) +5% to -5% Minimum current 1.5 A 0.02 A 0.0 A 0.0 A 0.0 A Maximum current 18.0 A 4.2 A 0.4 A 10.0 A 0.720 A The total combined 3.3 V and 5 V power must not exceed 100 watts. © Copyright IBM Corp. 2000 25