IBM PC 300PL manual Power supply, Power input, Power output, Aux

Chapter 4. Power supply

Chapter 4.	Power supply
The power-supply requirements		are supplied	by 145-watt PC		300PL Personal Computer power sup
The power supply provides 3.3-volt power			for the	Pentium	microprocessor			and	core chip
power for PCI adapters. Also included is			an auxiliary 5-volt			(AUX	5) supply		to	provide
power-management circuitry and a Wake on LAN adapter. The					power supply			converts		the ac
voltage into	four dc output	voltages and	provides	power	for	the	following:

ŸSystem board

ŸAdapters

ŸInternal drives

Ÿ Keyboard and auxiliary devices

ŸUSB devices

A logic signal on the power connector controls the power supply; the front panel switch 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 select the correct input voltage.

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 3HzHz

Power output

The power supply outputs shown in the following figures include the current-supply capabi connectors, including system board, DASD, PCI, and auxiliary outputs.

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

Note:

The

total

combined

3.3 V

and 5 V power

must not exceed 100 watts.

18  Copyright IBM Corp. September 1999