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Intel® Server Chassis SC1400UP / Intel® Server Platform SR1425BK1-E
VOLTAGE
+3.3V
+5V
+12V
5VSB
6.34 Over Voltage Protection (OVP)
The power supply over voltage protection shall be locally sensed. The power supply shall
shutdown and latch off after an over voltage condition occurs. This latch shall be cleared by
#
toggling the PSON
signal or by an AC power interruption. Table 14 contains the over voltage
limits. The values are measured at the output of the power supply's connectors. The voltage
shall never exceed the maximum levels when measured at the power pins of the power supply
connector during any single point of fail.
minimum levels when measured at the power pins of the power supply connector.
Exception: +5VSB rail should be able recover after its over voltage condition occurs.
Output Voltage
+3.3V
+5V
+12V
+5VSB
6.35 Over Temperature Protection (OTP)
The power supply will be protected against over temperature conditions caused by loss of fan
cooling or excessive ambient temperature. In an OTP condition the PSU will shutdown. When
the power supply temperature drops to within specified limits, the power supply shall restore
power automatically, while the 5VSB remains always on. The OTP circuit must have built in
hysteresis such that the power supply will not oscillate on and off due to temperature recovering
condition. The OTP trip level shall have a minimum of 4°C of ambient temperature hysterisis.
6.36 Control and Indicator Functions
The following sections define the input and output signals from the power supply.
Signals that can be defined as low true use the following convention:
#
= low true
signal
Revision 1.0
Table 39. Over Current Protection (OCP)
OVER CURRENT LIMIT
16A min; 25A max
19A min; 30A max
21A min; 30A max
2.5 min; 5.0A max
The voltage shall never trip any lower than the
Table 40. Over Voltage Protection (OVP) Limits
MIN (V)
3.9
5.7
13.3
5.7
(Iout limit)
MAX (V)
4.5
6.5
15
6.5
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