Rosewill RP500-2 User Manual download pdf (Page 5)

2.2 Efficiency

The power supply is a minimum of 72% efficient under typical load. The “Energy Star”

efficiency of the power supply is a minimum of 50% when the AC input power is 60W.

2.3 Remote ON/OFF control

The power supply DC outputs (with the exception of +5 VSB which is always available)

are enabled with an active-low, TTL-compatible signal (“PS-ON”), When PS-ON is

pulled to TTL low, the DC outputs are enabled. When PS-ON is pulled to TTL high or

open-circuited, the DC outputs are disabled. PS-ON may be active by either electronic

means or a mechanical switch.

2.4 Overshoot at TURN-ON/TURN-OFF

The output voltage overshoot upon the application or removal of the input voltage is

less than 10%.

2.5 Hold-up Time

The power supply will maintain output regulation despite a loss of a minimum of 16 ms

while under full load. Test to be performed at nominal input voltage.

2.6 Power Good Signal

A “power good” signal is asserted by the supply to indicate that the +5VDC output is

within regulation limits.

Power Good Signal Characteristics

Signal Type Open collector TTL compatible

Logic level low <0.8V while sinking 5mA

Logic level high >2.4V while sourcing 500uA

High state impedance 1K (from output to common)

POK delay 100-500ms

Power fall warning time 1ms minimum

3. Protection

3.1 Over Voltage Protection

The power supply prods latch-mode over-voltage protection as defined below:

Nominal output voltage Trigger voltage

+12V 13.4-15.6V

+5V 5.74-7.0V

+3.3V 3.76-4.3V

POWER SUPPLY

PERFORMANCE

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Rosewill RP500-2 User Manual Page 5