Protection Circuits; Over Current Protection (Ocp); Over Voltage Protection (Ovp); Over Temperature Protection (Otp) - Intel JBOD2312S3SP Hardware Manual

4.6.14

Protection Circuits

The protection circuits inside the power supply cause only the power supply's main outputs to shut down. If
the power supply latches off due to a protection circuit tripping, an AC cycle OFF for 15 seconds and a
PSON# cycle HIGH for one second reset the power supply.
4.6.15

Over Current Protection (OCP)

The power supply has a current limit to prevent the outputs from exceeding the values shown in the table
below. If the current limit is exceeded, the power supply will shut down and latch off. The latch will be
cleared by toggling the PSON# signal or by an AC power interruption. The power supply will not be damaged
from repeated power cycling in this condition. 12VSB will be auto-recovered after removing the OCP limit.
4.6.16

Over Voltage Protection (OVP)

The power supply over voltage protection is locally sensed. The power supply will shut down and latch off
after an over voltage condition occurs. This latch will be cleared by toggling the PSON# signal or by an AC
power interruption. 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 connectors of the power supply connector
during any single point of fail. The voltage never trips any lower than the minimum levels when measured at
the power connector. 12VSB will be auto-recovered after removing the OVP limit.
4.6.17

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
12VSB remains always on. The OTP circuit has a built-in margin so that the power supply will not oscillate on
and off due to temperature recovering conditions. The OTP trip level has a minimum of 4ºC of ambient
temperature margin.

4.7 Power Supply Status LED

There is a single bi-color LED to indicate power supply status. The LED operation is defined in the following
table.
Intel® Storage Server System JBOD2312S3SP Hardware Guide

Table 17. 460 Watt Power Supply Over Current Protection

Output Voltage
+12V
12VSB

Table 18. Over Voltage Protection (OVP) Limits

Output Voltage
+12V
12VSB
Input Voltage Range Over Current Limit
90–264VAC 47A min; 55A max
90–264VAC 2A min; 2.5A max
Min (V)
13.3 14.5
13.3 14.5
Max (V)
21