Intel SC5400BASE Benutzerhandbuch
Intel® Server Chassis SC5400 5U Kit TPS
Chassis Power Subsystem
Revision: 1.0
33
5.1.6.2
Over Temperature Protection
In an Over Temperature condition, the power supply 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 over temperature protection circuit has built-in
hysterisis such that the power supply will not oscillate on and off due to a temperature
recovering condition. The over temperature protection trip level shall have a minimum of 4
temperature drops to within specified limits, the power supply shall restore power automatically,
while the 5VSB remains always on. The over temperature protection circuit has built-in
hysterisis such that the power supply will not oscillate on and off due to a temperature
recovering condition. The over temperature protection trip level shall have a minimum of 4
C of
ambient temperature hysterisis.
5.1.7
670W Power Supply 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:
Signal# = low true
Signals that can be defined as low true use the following convention:
Signal# = low true
5.1.7.1
PSON# Input Signal
The PSON# signal is required for remotely turning on or off the power supply. PSON# is an
active low 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.
active low 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.
5.1.7.2
PWOK (Power OK) Output Signal
PWOK is a power OK signal and is pulled HIGH by the power supply to indicate that all the
outputs are within the regulation limits of the power supply. When any output voltage falls below
regulation limits or when AC power has been removed for a time sufficiently long so that power
supply operation is no longer guaranteed, PWOK will be de-asserted to a LOW state. The start
of the PWOK delay time shall be inhibited as long as any power supply output is in current limit.
outputs are within the regulation limits of the power supply. When any output voltage falls below
regulation limits or when AC power has been removed for a time sufficiently long so that power
supply operation is no longer guaranteed, PWOK will be de-asserted to a LOW state. The start
of the PWOK delay time shall be inhibited as long as any power supply output is in current limit.
5.1.8
670W Mean Time Between Failures (MTBF)
The power supply shall have a minimum MTBF at continuous operation of 100,000 hours at
75% load at 40
75% load at 40
C, as calculated by Bellcore RPP, or 250,000 hours demonstrated at 75% load
at 40
C.
5.2 830W Power Supply
The 830W power supply replaceable module has two outputs: 12V and 5VSB. The input is
power factor corrected. An IEC connector on the external face provides for AC input to the
power supply. The power supply contains a cooling fan.
power factor corrected. An IEC connector on the external face provides for AC input to the
power supply. The power supply contains a cooling fan.