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PC 6170 User's Manual
SHORT CIRCUIT PROTECTION
Output short circuit is defined to be a short circuit load of less than 0.1
ohm.
In the event of an output short circuit condition on +3.3V, +5V or +12V
output, the power supply
will shutdown and latch off. The power supply shall return to normal
operation after the short
circuit has been removed and the power switch has been turned off
for no more than 2 seconds.
In the event of an output short circuit condition –12V output, the power
supply will not be latch off.
The power supply shall return to normal operation as soon as the
short circuit has been removed and
the power switch has been turned off for no more than 2 seconds.
OVERLOAD PROTECTION
Overload currents defined as a 10 amp/sec fault current ramp starting
from full load, applied to the
+3.3V, +5V output, shall not cause that output to exceed 32 amps
before the output voltage drops
below 0.5 volts and is latched off. The +12V output shall not exceed
20 amps under the same ramp
conditions starting at full load before it is latched off.
POWER GOOD SIGNAL
The power good signal is a TTL compatible signal for the purpose of
initiating an orderly star-up
procedure under normal input operating conditions.
This signal is
asserted (low) until +5Vdc has
reached 4.75 volts during power up. Characteristics:
TTL signal asserted (low state) : less than 0.5V while sinking 10mA.
Power Supply Specification
65
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