10 Switch Mode Power Supply S82J
■ Overload Protection
10- to 300-W Models
The Power Supply is provided with an overload protection function
that protects the power supply from possible damage by overcurrent.
When the output current rises above 105% to 160% of the rated
output current, the protection function is triggered, automatically
decreasing the output voltage. When the output current falls within
the rated range, the overload protection function is automatically
cleared.
Note: 1. If the S82J is connected to a load with a built-in DC-DC
converter, the overload protection function may be triggered
at startup, and consequently the S82J may not operate.
2. Internal parts may occasionally deteriorate or be damaged
if a short-circuited or other overcurrent state continues
during operation.
Eliminate the overcurrent state as soon as possible.
3. In actual operation, the output voltage may not fall to 0 V
when the overload protection function is triggered. Even
with short-circuits on the load side, the drop in voltage will
vary depending on factors such as the impedance in the
load line.
4. The overload protection function is activated at 105% of the
rated output current for 300-W models.
600-W Models
If an excessive current flows for 5 s or more, the output will be turned
OFF and simultaneously the protection-ON alarm indicator will be lit.
To reset the S82J, turn OFF the power, leave the S82J for at least
three minutes, and then turn ON the power again.
Note: Internal parts may occasionally deteriorate or be damaged if a
short-circuited or other overcurrent state continues during
operation.
Eliminate the overcurrent state as soon as possible.
■ Overvoltage Protection
100-W (5-, 24-V Output) Models
Consider the possibility of an overvoltage and design the system so
that the load will not be subjected to an excessive voltage even if the
feedback circuit in the Power Supply fails. When an excessive
voltage that is approximately 120% of the rated voltage or more is
output, the output voltage is shut OFF, preventing damage to the load
due to overvoltage. Reset the power by turning it OFF for at least one
minute and then turning it back ON again.
300- and 600-W Models
When an excessive voltage that is approximately 120% of the rated
voltage or more is output, the output voltage will be turned OFF and
simultaneously the protection-ON alarm indicator will be lit. To reset
the S82J, turn OFF the power, leave the S82J for at least three
minutes if it is a 600-W model or at least 90 seconds if it is a 300-W
model, and then turn it back ON again.
■ Overheat Protection Function
600-W Models Only
If the internal temperature of the S82J rises excessively as a result of
fan failure or any other reason, the overheat protection circuit will be
triggered to protect the internal elements of the S82J and
simultaneously the protection-ON alarm indicator will be lit. To reset
the S82J, turn OFF the power, leave the S82J for at least three
minutes, and then turn it back ON again.
■ Inrush Current, Startup Time,
Hold Time
10 W, 25 W Models
50 W, 100 W (24 V) Models
100 W (5 V, 12 V, 15 V), 150 W, 300 W Models
0
Output current (%)
10050
Intermitted operation
Output voltage (V)
500 100
Output current (%)
Intermitted operation
Output voltage (V)
0 10050
Output voltage (V)
Output current (%)
50
Output interrupted
0
100
Output current (%)
Output voltage (V)
Voltage
adjustable range
Output voltage (V)
Rated output
voltage
Overvoltage
protection
operates
90%
96.5%
Input ON Input OFF
Startup time
Inrush current on input application
AC input
voltage
AC input
current
Output
voltage
Hold time
(20 ms
min.)
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