PC 817
2
User
’
s
Manua
l
72
Power Suppl
y
S
p
ec
i
f
ication
SHORT
CIRCU
I
T
PROTECTION
Output
short
circuit
is
defined
to
be
a
short
circuit
load
of
less
t
han
0
.
1
ohm
.
I
n
the
event
of
an
output
short
circuit
condition
on
+3.3V,
+5V
or
+12V
output
, t
he
power
supply
will
shutdown
and
latch
of
f.
The
power
supply
shall
return
t
o
normal
operation
after
t
he
short
circuit
has
been
removed
and
the
power
switch
has
been
turned
off
f
or
no
more
than
2
seconds.
OVERLOAD
PROTECTION
Overload
currents
defined
as
a
10
amp/sec
fault
current
ramp
starting
f
rom
f
ull
load,
applied
t
o
t
he
+3.3V,
+5V
output
,
shall
not
cause
that
output
t
o
exceed
32
amps
before
t
he
output
voltage
drops
below
0.5
volts
and
is
latched
of
f.
The
+12V
output
shall
no
t
exceed
20
amps under
t
he
same
ramp
conditions
starting
at
f
ull
load
before
it
is
latched of
f.
POWER
SIGNAL
100 –500mSec.
POWER GOOD @ 115/230V,FULL LOAD
POWER FAIL @115/230V, FULL LOAD 1 mSec. minimum
2. Efficiency
Typical
load
Loading Voltage Full load Light load
Required Minimum 115V 80% 81% 80%
Efficiency
Required Minimum 230V 81% 82% 80%
Efficiency
3. Environmental Requirements
f
Operating
temperature
range:
10
°
C
to
50
°
C
f
Storage
temperature
range:
-20
°
C
to
+80
°
C
f
Hum
i
d
i
ty
,
non-condensing:
5%
~
95%RH,
Non-
Condensing