Technical Product Specification
Intel® Server Chassis SC5600 Chassis Power Subsystem
Revision 1.1
Intel order number E39532-004
33
5.1.5.3 Voltage Regulation
The output voltages must stay within the following voltage limits when operating at steady state
and dynamic loading conditions. These limits include the peak-peak ripple/noise. All outputs are
measured with reference to the return remote sense signal (Returns). The +12V3, +12V4, –12 V,
and 5 VSB outputs are measured at the power supply connectors referenced to Returns. The
+3.3 V, +5 V, +12V1, and +12V2 are measured at the remote sense signal located at the signal
connector.
Table 21. Voltage Regulation Limits
Parameter Tolerance Minimum Nominal Maximum Units
+3.3 V - 5% / +5% +3.14 +3.30 +3.46 V
rms
+5 V - 5% / +5% +4.75 +5.00 +5.25 V
rms
+12V1 - 5% / +5% +11.40 +12.00 +12.60 V
rms
+12V2 - 5% / +5% +11.40 +12.00 +12.60 V
rms
+12V3 - 5% / +5% +11.40 +12.00 +12.60 V
rms
+12V4 - 5% / +5% +11.40 +12.00 +12.60 V
rms
- 12 V - 5% / +9% - 11.40 -12.00 -13.08 V
rms
+5 VSB - 5% / +5% +4.75 +5.00 +5.25 V
rms
5.1.5.4 Standby Operation
The 5 V standby output is present when an AC input greater than the power supply turn on
voltage is applied.
5.1.5.5 Fan-less Operation
The power supply fan is off (fan-less operation) when the power supply is in the stand-by mode
of operation. The power supply will work indefinitely in stand-by mode with the input AC power
on, power supply off, and the 5 V stand-by output at full load (= 3 A).
5.1.6 670-W Power Supply Protection Circuits
Protection circuits inside the power supply shall cause only the power supply’s main outputs to
shut down. If the power supply latches off due to a protection circuit tripping, an AC cycle OFF
for 15 seconds and a PSON
#
cycle HIGH for 1 second shall be able to reset the power supply.
5.1.6.1 Over Current Protection (OCP)
If the current limits are exceeded, the power supply shall shutdown and latch off. You can clear
the latch by toggling the PSON
#
signal or by an AC power interruption. The power supply shall
not be damaged from repeated power cycling in this condition. -12V and 5VSB shall be
protected under over-current or shorted conditions so no damage can occur to the power supply.
5VSB will be auto-recovered after removing OCP limit.