IBM PC 300PL Manuel D’Utilisation
Chapter 4. Power supply
Chapter 4. Power supply
The power-supply requirements are supplied by 145-watt PC 300PL Personal Computer power supply.
The power supply provides 3.3-volt power for the Pentium microprocessor and core chip set and 5-volt
power for PCI adapters. Also included is an auxiliary 5-volt (AUX 5) 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:
The power supply provides 3.3-volt power for the Pentium microprocessor and core chip set and 5-volt
power for PCI adapters. Also included is an auxiliary 5-volt (AUX 5) 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.
connected to the power supply.
The power supply connects to the system board with a 2 x 10 connector.
Power input
The following figure shows the power-input specifications. The power supply has a manual switch to
select the correct input voltage.
select the correct input voltage.
Power output
The power supply outputs shown in the following figures include the current-supply capability of all the
connectors, including system board, DASD, PCI, and auxiliary outputs.
connectors, including system board, DASD, PCI, and auxiliary outputs.
Note: The total combined 3.3 V and 5 V power must not exceed 100 watts.
Figure 7. Power-input requirements
Specification
Measurements
Input voltage, low range
100 (min) to 127 (max) V AC
Input voltage, high range
200 (min) to 240 (max) V AC
Input frequency
50 Hz
±
3 Hz or 60 Hz
±
3 Hz
Figure 8. Power-output (145 watts)
Output voltage
Regulation
Minimum current
Maximum current
+5 volts
+5% to
−
4%
1.5 A
18.0 A
+12 volts
+5% to
−
5%
0.2 A
4.2 A
−
12 volts
+10% to
−
9%
0.0 A
0.4 A
+3.3 volts
±
2%
0.0 A
10.0 A
−
5 volts
±
10%
0.0 A
0.3 A
+5 volt (auxiliary)
+5% to
−
5%
0.0 A
0.02 A
18
Copyright IBM Corp. September 1999