Control And Indicator Functions (Hard-Wired); Table 92. Over-Voltage Protection (Ovp) Limits - Intel SC5299BRP Technical Product Specification

Power Sub-system
2.4.4.2 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 combo 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.
2.4.5

Control and Indicator Functions (Hard-wired)

The following sections define the input and output signals from the power distribution board.
Signals that can be defined as low true use the following convention:
#
signal = low true
2.4.5.1 PSON
#
#
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 for the +5VSB) turn off. This signal is pulled
to a standby voltage by a pull-up resistor internal to the power supply.
76

Table 92. Over-voltage Protection (OVP) Limits

Output Voltage
+3.3V
+5V
-12V
+12V1/2/3/4/5 See Power Supply specification
+5vsb See Power Supply specification
Input and Output Signals
Intel order number D37594-005
®
Intel Entry Server Chassis SC5299-E TPS
#
signal or by an AC power interruption.
OVP MIN (V) OVP MAX (V)
3.9 4.5
5.7 6.5
-13.3 -14.5
#
is an active low
Revision 3.1