Chapter 4. Power Supply
Chapter 4. Power Supply
The power supply requirements are supplied by 145-watt PC 300GL power supply. The power supply
provides 3.3-volt power for the Pentium microprocessor and core chip set and 5-volt power for ISA and
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.
The power supply connects to the system board with a 2 x 10 connector.
Power Input
The following figure shows the input power specifications. The power supply has a manual switch to
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.
The total combined 3.3 V and 5 V power should not exceed 100 watts.
Figure 12. 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 13. Power Output (145 Watt)
Output Voltage
Regulation
Minimum Current
Maximum Current
+5 volts
+5% to
−
5%
1.5 A
18.0 A
+12 volts
+5% to
−
5%
0.02 A
4.2 A
−
12 volts
+10% to
−
10%
0.0 A
0.4 A
+3.3 volts
+5% to
−
5%
0.0 A
10.0 A
+5 volt (auxiliary)
+5% to
−
5%
0.0 A
0.720 A
18
Copyright IBM Corp. November 1998
Содержание PC 300GL Type 6267
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