Technical Product Specification

Intel
®
Server System R1000RP Family TPS Power Subsystem
Revision 1.3 Intel order number: G91532-003 27
3.2.7.2 Over Voltage Protection (OVP)
The power supply over voltage protection should be locally sensed. The power supply must shut
down 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. The following table contains the over voltage
limits. The values are measured at the output of the power supply pins. The voltage should
never exceed the maximum levels when measured at the power pins of the power supply
connector during any single point of fail. The voltage should never trip any lower than the
minimum levels when measured at the power pins of the power supply connector. 5VSB will be
auto-recovered after the OVP limit is removed.
Table 23. Over Voltage Protection (OVP) Limits
OUTPUT VOLTAGE
PROTECTION POINT [ V]
+12 V
13.6V ~ 15.0V
5VSB
5.6V ~ 6.5V
3.2.7.3 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 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 must have a built in
margin, so that the power supply will not oscillate ON and OFF due to the temperature
recovering condition. The OTP trip level should have a minimum of 4C of ambient temperature
margin.