IBM 6268, 6288, 6278 manual Power supply, Power input, Power output

Chapter 4. Power supply

Chapter 4.

Power supply

The

power

supply requirements

are supplied

by a 145-watt power supply. The power

su

3.3-volt power for the system

memory,

Super

I/O, and core chip set

and 5-volt

power

hard disk, and diskette drive. Also included

is an auxiliary 5-volt (AUX 5) supply to

power standby

circuitry and

a

Wake

on

LAN

adapter. The

power supply

converts

the

AC

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 switc 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 manu
select the correct input voltage.
Figure	8. 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 cap

connectors,

including

system

board,

DASD,

PCI, and

auxiliary outputs.

Figure

9.

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

The

total

combined

3.3

V

and 5

V power

should

not exceed

100 watts.

 Copyright IBM Corp. September 1999 17