Spire JEWEL 550W / SP-ATX-550W-PFC - Manual (Page 12)

Version:A/0 Page 12 of 17
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2.4 Output Protection
Each DC output is protected from over voltage, over current and short circuit. The
following sections include the details for these protection mechanisms.
2.4.1 Over voltage Protection
The overvoltage sense circuitry and reference reside in packages that are
separate and distinct from the regulator control circuitry and reference. No
single point fault is able to cause a sustained overvoltage condition on any
or all outputs. The power supply provides latch-mode overvoltage
protection defined as:
+5V output is between 5.74V to 7V
+12V output is between 13.4V to 15.6V
+3.3V output is between 3.76V to 4.8V
2.4.2 Over Current Protection
The power supply DC outputs are protected from supplying output current
above the maximum ratings defined in Table 3, and when output power is
between
120%~180%. With the exception of the 5VSB output, all DC outputs
are latched off in the event of an over-current event on any of the DC outputs.
In the event of a short circuit on any output , except the 5VSB rail , all outputs
are disabled and remain disabled until the power supply is powered off back
on. The 5VSB rail will recover upon removal of the over current condition.
2.4.3 Short-circuit Protection
The power supply DC outputs are protected from damage due to faults,
when any output shorts to ground. In the event of a short circuit on any
output, all outputs shall be disabled and remain disable until the power
supply is powered off and back on. The +5VSB rail will recover upon
removal of the over current condition.
3 Mechanical
3.1 AC Connector
The AC input receptacle is an IEC 320 type or equivalent. In lieu of a dedicated
switch, the IEC 320 receptacle may be considered the mains disconnect.