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3.6 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+12VDC 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
3.7 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.
4.1 Signal timing drawing
Figure 2. is a reference for signal timing for main power connector signals and rails.
4.2 Hold up time
When the power loss its input power, it shall maintain 16ms in regulation limit at normal input voltage
and 75% load (AC:115V/60Hz or 230V/50Hz)
Figure 2. PS-OK Timing Sequence
(1)T3: Power good signal turn on delay time (100ms~500ms)
(2)T4: Power good signal turn off delay time (75%Load 1ms min)
(3)T2: Rise tim (0.1~20ms)
(4)T6: Hold up time (75%Load 16ms Min)
4. 0 TIMING
