Overvoltage/Overcurrent Protection
Voltage
Type
Rating
Nominal(Vac)
Protection
Amps
110 Fuse
5.0
220/240
Fuse
3.5
Voltage
and Current Protection
Power Good Signal
When
the supply
is
switched off for a minimum
of
1.0
second,
and then switched on, the
'power
good'
signal will be
regenerated.
The
'power
good'
signal indicates that there
is
adequate power to
continue processing. If the power goes below the specified levels,
the
'power
good'
signal triggers a system shutdown.
This signal
is
the logical
AND
of the dc output-voltage
'sense'
signal and the ac input-voltage
'fail'
signal. This signal is
TTL-compatible up-level for normal operation
or
down-level for
fault conditions. The ac
'fail'
signal causes
'power
good'
to
go
to a down level when any output voltage falls below the regulation
limits.
The dc output-voltage
'sense'
signal holds the
'power
good'
signal at a down level (during power-on) until all output voltages
have reached their respective minimum sense levels. The
'power
good'
signal has a turn-on delay of at least 100 ms
but
no greater
than
500 ms.
Power Supplies 3-5
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