4-22 Theory of Operation
4.7.8 Over-Current Protection
All outputs are protected against damage due to overloads or short circuits. Short
circuit current levels for any output, unless specified below, will not exceed 125% of
maximum current for that output.
Each output has independent current limiting, that is the over-current of any of these
outputs will not cause any other output except –5.0V Output. If –5.0V output will
short, -12.0V output reduces output voltage. The over current circuitry is latch type.
Whenever Over-Current protection occur, all Outputs shut down to protect Circuitry
damage. –5V output only have over-current adjustment value(6A) and adjustment
potentiometer.
4.7.9 Over-Temperature Protection
The power supply will shut down before any damage occurs from over-temperature.
This is true independent of the cause of the over-temperature condition (i.e. blocked
power supply cooling fan, excessive ambient temperature, etc.) When the power
supply restart , the power supply must remove AC Line for a few minutes and
remove the cause of the over-temperature condition.
4.7.10 Over-Voltage Protection
Over-voltage protection is required to reduce the likelihood of damage to system
components in the event of a single point fault within the power supply. All outputs
incorporate an over-voltage protection limited to less than 135% of the nominal Vset
values. When the power supply restart , the power supply must remove AC Line for
a few minutes and remove the cause of the over-Voltage condition.
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