Technical Product Specification

Power Sub-system Intel® Server Chassis SC5650 TPS
Revision 1.2
Intel order number E39531-004
28
Table 21. Over Current Protection (OCP)
VOLTAGE OVER CURRENT LIMIT
Min Max
+3.3 V 26.4 A 36 A
+5 V 26.4 A 36 A
+12 V1 18 A 20 A
+12 V2 18 A 20 A
+12 V3 18 A 20 A
+12 V4 18 A 20 A
-12 V 0.625 A 4 A
5 VSB N/A 8 A
2.1.7.1 Over Voltage Protection (OVP)
The power supply over voltage protection is locally sensed. After an over-voltage condition
occurs, the power supply shuts down and latches off. You can clear this latch by toggling the
PSON
#
signal or by an AC power interruption. The following table contains the over voltage
limits. The values are measured at the output of the power supply’s pins. The voltage never
exceeds the maximum levels when measured at the power pins of the power supply connector
during any single point of fail. The voltage will not trip any lower than the minimum levels when
measured at the power pins of the power supply connector. After the OVP condition is removed,
+5 VSB will auto-recover.
Table 22. Over Voltage Protection Limits
Output Voltage MIN (V) MAX (V)
+3.3 V 3.9 V 4.5 V
+5 V 5.7 V 6.5 V
+12 V1,2,3,4 13.3 V 14.5 V
-12 V -13.3 V -16 V
+5 VSB 5.7 V 6.5 V
2.1.7.2 Over Temperature Protection (OTP)
The power supply is protected against over temperature conditions caused by loss of fan
cooling or excessive ambient temperature. In an OTP condition, the power supply shuts down.
When the power supply temperature drops to within specified limits, the power supply restores
power automatically, while the 5 VSB will always remain on. The OTP circuit has a built-in
hysteresis such that the power supply will not oscillate on and off due to a temperature
recovering condition. The OTP trip level has a minimum of 4°C of ambient temperature
hysteresis.