SilverStone ST1500 Manual - Manual (Page 7)

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4. TIMING
4-1. Signal timing drawing
Figure 2. is a reference for signal timing for main power connector signals and
Figure 2. PW-OK Timing Sequence
T5
T1
T6
T2
T4
T3
~
~
~
~
on
VAC
PS-ON
+12V/+5V/+3.3V O/P
pw-OK
pw-OK Sense level=95% of
nominal
off
95%
10%
3-5. No load operation
No damage or hazardous condition should occur with all the DC output connectors
disconnected from the load. The power supply may latch into the shutdown state.
3-4. Short circuit
An output short circuit is defined as any output impedance of less than 0.1 ohms.The
power supply shall shut down and latch off for shorting the +3.3 VDC,+5 VDC,or+12 VDC
rails to return or any other rail. Shorts between main output rails and +5VSB shall not
cause any damage to the power supply. The power supply shall either shut down and
latch off or fold back for shorting the negative rails.+5VSB must be capable of being
shorted indefinitely, but when the short is removed, the power supply shall recover
automatically or by cycling PS_ON#.The power supply shall be capable of withstanding
a continuous short-circuit to the output without damage or overstress to the unit.
(1)T3: Power good signal turn on delay time (100ms~500ms)
(2)T4: Power good signal turn off delay time (1ms min)
(3)T5: Rise time (5~70ms max)
(4)T6: Hold up time (16ms min)