Справочник Пользователя для Intel SE7520JR2

Revision 1.0 

 

The power supply shall contain control circuit that provides monotonic soft start for its outputs 
without overstress of the AC line or any power supply components at any specified AC line or 
load conditions. There is no requirement for rise time on the 5V Standby but the turn on/off shall 
be monotonic.  

When the power subsystem operates in a no load condition, it does not need to meet the output 
regulation specification, but it must operate without any tripping of over-voltage or other fault 
circuitry.  When the power subsystem is subsequently loaded, it must begin to regulate and 
source current without fault. Each output voltage may not be internally diode isolated. At the 
same time failure in the primary side of one power supply doesn’t cause the other to shut down. 

These are the timing requirements for the power supply operation.  The output voltages must 
rise from 10% to within regulation limits (T

vout_rise

) within 5 to 70ms, except for 5VSB - it is 

allowed to rise from 1.0 to 70ms. The +3.3V, +5V and +12V output voltages should start to rise 
approximately at the same time. All outputs must rise monotonically. The +5V output needs 
to be greater than the +3.3V output during any point of the voltage rise. The +5V output must 
never be greater than the +3.3V output by more than 2.25V. Each output voltage shall reach 
regulation within 50ms (T

vout_on

) of each other during turn on of the power supply. Each output 

voltage shall fall out of regulation within 400msec (T

vout_off

) of each other during turn off. The 

following figures show the timing requirements for the power supply being turned on and off via 
the AC input, with PSON held low and the PSON signal, with the AC input applied. 

T

vout_rise

 

Output voltage rise time from each main output. 

msec 

T

vout_on

 

All main outputs must be within regulation of each 
other within this time. 

msec 

T 

vout_off

 

All main outputs must leave regulation within this 
time. 

msec 

Note: 
The 5VSB output voltage rise time shall be from 1.0ms to 25.0ms