Intel SC5299WS User Manual
Intel
®
Entry Server Chassis SC5299-E TPS
Power Sub-system
Revision 3.1
Intel order number D37594-005
57
2.3.3.15
Residual Voltage Immunity in Standby Mode
The power supply is immune to any residual voltage placed on its 12V output (typically a
leakage voltage through the system from standby output) up to 1000 mV. This residual voltage
does not have any adverse effects on the power supply, including additional power dissipation
or over-stressing/over-heating any internal components or adversely effect the turn-on
performance (no protection circuits tripping during turn on).
leakage voltage through the system from standby output) up to 1000 mV. This residual voltage
does not have any adverse effects on the power supply, including additional power dissipation
or over-stressing/over-heating any internal components or adversely effect the turn-on
performance (no protection circuits tripping during turn on).
While in standby mode, at no load condition, the residual voltage on 12V output does not
exceed 100 mV.
exceed 100 mV.
2.3.3.16
Soft Starting
The power supply contains control circuits that provide monotonic soft start of its outputs without
overstress of the AC line or any power supply components at any specified AC line or load
conditions. There is no requirement for rise time on the 5VSB but the turn on/off is monotonic.
overstress of the AC line or any power supply components at any specified AC line or load
conditions. There is no requirement for rise time on the 5VSB but the turn on/off is monotonic.
2.3.3.17
Zero Load Stability Requirements
When the power subsystem operates in a no-load condition in a 1+0 or 1+1 configuration, it
does not need to meet the output regulation specification, but it must operate without any
tripping of over-voltage or other fault circuitry. When the power subsystem is subsequently
loaded, it must begin to regulate and source current without fault.
does not need to meet the output regulation specification, but it must operate without any
tripping of over-voltage or other fault circuitry. When the power subsystem is subsequently
loaded, it must begin to regulate and source current without fault.
2.3.4
Protection Circuits
Protection circuits inside the power supply 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
15sec and a PSON# cycle HIGH for 1sec will reset the power supply.
down. If the power supply latches off due to a protection circuit tripping, an AC cycle OFF for
15sec and a PSON# cycle HIGH for 1sec will reset the power supply.
2.3.4.1
Over-current Protection (OCP)
The power supply has a current limit to prevent the +5VSB and +12V outputs from exceeding
the values shown in the following table. If the current limits are exceeded the power supply will
shut down and latch off. The latch will be cleared by toggling the PSON
the values shown in the following table. If the current limits are exceeded the power supply will
shut down and latch off. The latch will be cleared by toggling the PSON
#
signal or by an AC
power interruption. The power supply is not damaged from repeated power cycling in this
condition. 5VSB is protected under over-current or shorted conditions so that no damage can
occur to the power supply.
condition. 5VSB is protected under over-current or shorted conditions so that no damage can
occur to the power supply.
Table 65. Over-current Protection (OCP)
Output
Voltage
Over-current Protection Limits
+12V
120% min (= 65.0 A min); 140% max (= 76.0 A max)
+5VSB
120% min (= 3.6 A min); 200% max (= 6.0 A max)