Silverstone ST85ZF SST-ST85ZF User Manual

3.5 Timing Requirements   

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

vout_rise

) within 5 to 70mS. The +5V, +3.3V and +12V output voltages should start 

to rise at about 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 50 mS (T

vout_on

) of each other 

during turn on of the power supply. Each output voltage shall fall out of regulation within 400 mS (T

vout_off

) of 

each other during turn off. Figure 1 and figure 2 show the turn On and turn Off timing requirement. In Figure 2, 
the timing is shown with both AC and PSON# controlling the On/Off of the power supply. 

     

Description 

T

v

out_rise

 

  Output voltage rise time from each main output.(+5Vsb < 70mS)

5 

70 

mS 

T

vout_on

 

  All main output must be within regulation of each other within 

 this time. 

 50 

mS 

T

vout_off

 

All main output must leave regulation within this time 

 

400 

mS 

 
 
 
 
 
 
 
 
                      Vout 

     

 

Description: 

   Electrical Specification

SilverStone Technology Co., Ltd. 

 

Subject: 

SilverStone Technology 

Model: ST85ZF 

Switching Power Supply 

 

 

Document No.: 

   ES-850-ZEUS-01 

File Name: ST85ZF.doc                                           Page :  5    

  

 

 
 
                      V1     

10% Vout

 

                               

                      V2 
 
                      V3 
 
                      V4 
 
 
                                                             

T

vout_on

                                                   

T

vout_off

                               

                               

T

v

out_rise