4
3.
Overall Performance:
a.
Hold up time: 14ms at full load normal line input voltage.
b.
Switching frequency: 50KHz at normal line input.
c.
Stability: +/- 5% for 24KHR after warm up.
4.
Protections:
a.
Under voltage protection.
If an under voltage fault occurs, the supply will latch all DC outputs into a shutdown state
when +12V,+5V & +3.3V outputs under 60% of its maximum value.
b.
Over voltage protection
Output
Minimum
Nominal
Maximum
Unit
+12 VDC
13.4
15.0
17
Volts
+5 VDC
5.70
6.3
7.0
Volts
+3.3 VDC
3.70
4.2
4.8
Volts
c.
Short circuit
An output short circuit is defined as any output impedance less than 0.1 ohms. The power
supply shall shut down and latch off for shorting the +3.3 VDC,+5 VDCor+12 VDC rails.
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.
