05
3.1 Over current protection
The power supply shall have current limit to prevent the +3.3V,+5V,and +12V outputs from exceeding
the values shown in the following Table.If the current limits are exceded the power supply shall shutdown
and latch off.
3.2 Over Temperature Protection
The power supply will be protected against over temperature conditions caused by loss of fan cooling
or excessive ambient temperature.In an OTP condition the PSU will shutdown.When the power supply
temperature drops to within specifide limits,the power supply shall restore power automatically.The
OTP circuit must have built in hysteresis such that the power supply will not oscillate on and off due to
temperature recovering condition.
3.3 Over-power protection
The power supply will be shutdown and latch off when output power within 110~150% of rated DC output.
Note: Assurance machine can work at low voltage,full load won't damage machine.
3.4 Under voltage protection.
In an under voltage fault occurs, the supply will latch all DC outputs into a shutdown state when +12V,
+5V & +3.3V outputs under 85% of it's maximum value.
3.5 Over voltage protection
The over voltage sense circuitry and reference shall reside in packages that are separate and distinct
from the regulator control circuity and reference.No single point fault shall be able to cause a sustained
over voltage condition on any or all outputs.The supply shall provide latch-mode over voltage protection
as defined in Table.
3.0 PROTECTION
output
+12V VDC
+5 VDC
+3.3 VDC
Nominal
15
6
4
Minimum
13
5.5
3.6
Voltage
+12V(1000W)
+12V(1200W)
+5V
+3.3V
Over Current Limit (Iout limit)
90A minimum; 125A maximum
110A minimum; 150A maximum
28A minimum; 48A maximum
28A minimum; 48A maximum
Maximum
17
7
5
Unit
Volts
Volts
Volts
