SilverStone SST-ST50F [6/12] St50ef plus sc manual 06 pdf

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.

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.

Minimum

9.5

4.1

2.55

+3.3 VDC

output

+12 V1DC or +12V2DC

+5 VDC

Nominal

10.0

4.3

2.69

Maximum

10.5

2.83

4.47

Unit

Volts

4. TIMING

4.1 Signal timing drawing

Figure 2. is a reference for signal timing for main power connector signals and rails.

3.6 Under voltage protection

The under voltage sense circuitry and reference shall reside in packages that are separate and

distinct from the regulator control circuity and reference.No single point fault shall be able to

cause a sustained under voltage condition on any or all outputs.The supply shall provide

latch-mode under voltage protection as defined in Table.