Table 18. Over Voltage Protection Limits - Intel SC5299BRP Technical Product Specification

Power Sub-system
limits. The values are measured at the output of the power supply's connectors. 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.
Exception: +5VSB rail will recover after its over voltage condition occurs.
2.1.6.3 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 PSU will shut down. When
the power supply temperature drops to within specified limits, the power supply will restore
power automatically, while the 5VSB always remains 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.
2.1.6.4 PSON# Input Signal
#
The PSON signal is required to remotely turn on/off the power supply. PSON
signal that turns on the +3.3V, +5V, +12V, and -12V power rails. When this signal is not pulled
low by the system, or left open, the outputs (except the +5VSB) turn off. This signal is pulled to
a standby voltage by a pull-up resistor internal to the power supply.
22

Table 18. Over Voltage Protection Limits

Output Voltage
+3.3V
+5V
+12V1,2
-12V
+5VSB
Intel order number D37594-005
®
Intel Entry Server Chassis SC5299-E TPS
MIN (V) MAX (V)
3.71
5.62
13.4
-13.5 -15.0
5.7
4.2
6.5
15.0
6.5
#
is an active low
Revision 3.1