Protection Circuits; Table 51. Over-Current Protection Limits / 240Va Protection - Intel SC5650HCBRP Product Specification

Power Sub-system
4.2.2.13 Soft Start Requirements
The power supply contains a control circuit which provides monotonic soft start for its outputs
without overstressing 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.
4.2.3

Protection Circuits

Protection circuits inside the cage (and the power supply) cause the power supply's main +12V
output to shut down, thereby forcing the remaining three outputs on the cage to shut down. If
the power supply latches off due to a protection circuit tripping, an AC cycle OFF for 15 sec min
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and a PSON cycle HIGH for 1 second will reset the power supply and the PDB.
4.2.3.1 Over-current Protection (OCP) / 240VA Protection
Each DC/DC converter output on the cage has individual OCP circuits. The PS+cage
combination will shut down and latch off after an over-current condition occurs. This latch is
cleared by toggling the PSON
at the PDB harness connectors. The DC/DC converters are not damaged from repeated power
cycling in this condition. The +12V output from the power supply is divided on the PDB into 5
channels and each channel is limited to 240VA of power except for +12V5 (+12V5 is not user
accessible). Current sensors and limit circuits are available to shut down the entire PS+PDB
combination if the limit is exceeded. The over-current limits are listed in the following table.

Table 51. Over-current Protection Limits / 240VA Protection

Output Voltage
+3.3V
+5V
-12V
+12V1
+12V2
+12V3
+12V4
+5VSB
4.2.3.2 Over-voltage Protection (OVP)
Each DC/DC converter output on the cage has individual OVP circuits built in and is locally
sensed. The PS+cage combination will shut down and latch off after an over-voltage condition
occurs. This latch can be cleared by toggling the PSON
The following table defines the over-voltage limits. The values are measured at the cage
harness connectors. The voltage does not exceed the maximum levels when measured at the
power pins of the output harness connector during any single point of fail. The voltage does not
trip any lower than the minimum levels when measured at the power pins of the cage connector.
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signal or by an AC power interruption. The values are measured
MIN OCP Trip Limits
110% min (= 26.4A min)
110% min (= 33A min)
0.625A
18A
18A
18A
18A
See the Power Supply specification for details.
Intel order number E81443-002
Intel® Server System SC5650HCBRP TPS
MAX OCP Trip Limits
150% max (= 36A max)
150% max (= 45A max)
2.0A
20Amax
20Amax
20A max
20A max
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signal or by an AC power interruption.
Revision 1.2