SilverStone ST46GF Manual - Manual (Page 5)

ST46GF
04
3.3 Timing Requirements
These are the timing requirements for the power assembly operation. The output voltages must rise
from 10% to within regulation limits (Tvout_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 (Tvout_on) of each other during turn on of the power supply.
Each output voltage shall fall out of regulation within 400 mS (Tvout_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.
Table 4 – Output Voltage Timing
Figure 1 : Output Voltage Timing
Item
Tvout_rise
Tvout_on
Tvout_off
Description
Output voltage rise time from each main output.(+5Vsb < 70mS)
All main output must be within regulation of each other within this time.
All main output must leave regulation within this time
MIN
5
MAX
70
50
400
Units
mS
mS
mS