Important Operating Characteristics
Over Voltage/Current Protection
PRIMARY
(INPUT)
VOLTAGE
RATING
NOMINAL
TYPE
PROTECTION
AMPS
VAC
120
60
Hz
FUSE
TYPE
2
SOC
SD4
2AMPS
Power On/Off Cycle: When the supply is turned off for a maximum
of
5 seconds, and then turned on, the power good signal will be
regenerated.
Signal Requirements
The power good signal indicated that there
is
adequate power to
continue processing.
If
the power goes below the specified levels,
the power good signal triggers a system shut-down.
The Power Supply. Provides a power good signal out, to indicate the
presence
of
the
+/-5V
and
+/-12Voutputs
are above the sense level
defined in the chart below, the power good signal is an up level (2.4V to
"'"
5 .5V),
TTL
compatible and capable of sourcing 60
VA.
When any
of
the four sensed output voltages is below its sense level voltage as
defined in the chart below, the power good signal is down level
(OV
to
O.4V),
TTL
compatible and capable
of
sinking
500
VA.
The power
good signal (after all levels
of
the output voltage are good) has a turn
on delay
of
100 MS, but no greater than 500 MS.
The sense levels
of
the
+/-5V
and
+/-12V
outputs are:
SENSE
VOLTAGE
OUTPUT
MIN
NOMINAL
MAX
+5V
+3.7
+4.0
+4.3
-5V
-3.7
-4.0
-4.3
+12V
+8.5
+9.6
+10.5
-12V -8.5 -9.6 -10.5
2-36
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