Intel SC5400BASE Manual Do Utilizador

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

  C of 

ambient temperature hysterisis. 

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 
 

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.  

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. 

The power supply shall have a minimum MTBF at continuous operation of 100,000 hours at 
75% load at 40

  C, as calculated by Bellcore RPP, or 250,000 hours demonstrated at 75% load 

at 40

 

C. 

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.