Over-Current Protection; Short Circuit Protection; Reset After Shutdown; Table 25. Over-Current Protection Limits - Intel S7000FC4UR Technical Product Specification

Intel® Server System S7000FC4UR TPS
10.2.4 Over­Current Protection
Over-current is a fault condition defined as a 10A/s current ramp starting from full load applied
to the output under test. A fault on any output will cause the rest of the outputs to latch off. (See
note 4.)
Output Level
+3.3V standby
+12V
+12V
Notes:
1. Output is Level III SELV and non-energy hazard complaint
2. The above current limits will be satisfied throughout the entire operating temperature range
3. A fault on any output other than +3.3V standby will not cause the +3.3V standby to turn off. A fault on
+3.3V standby will cause the other outputs to turn off.
4. Dynamic loading must not cause a false over current when two supplies are in parallel.
5. The +3.3V standby output will not latch off. It must return to normal operation once the fault is removed.
Current foldback method is preferred.
10.2.5

Short Circuit Protection

A short circuit, which is defined as an impedance of 0.1 ohms or less, applied to any output
during start-up or while running will not cause any damage to the power supply (connectors,
components, PCB traces, etcetera).
When the +3.3VSB is shorted the output may go into "hiccup mode." When the +3.3VSB
attempts to restart, the maximum peak current from the output must be less than 8.0A. The
maximum average current, taking into account the "hiccup" duty cycle, must be less than 4.0A.
10.2.6

Reset After Shutdown

If the power supply latches into a shutdown state due to a fault condition on any output, the
power supply will return to normal operation only after the fault has been removed and the
power supply has been power-cycled. Power cycling is defined as either:
Removing AC input power, waiting for +3.3V standby to drop below 1.0V, then
reapplying AC power. (The time it takes for +3.3V standby to drop below 1.0V must not
exceed 15 seconds.)
Cycling the state of PS_ON from on to off to on. (The minimum cycle time will be 1mS.)
Revision 1.0

Table 25. Over-Current Protection Limits

Input Voltage
1,3,4,
90 – 140 VAC
180 – 264 VAC
Minimum
2,4
7 Amps 10 Amps
115 Amps 132 Amps
151 Amps 173 Amps
1570W Power Supply
Maximum
2,4
87