SilverStone ST60F [4/12] St60f manual 04

AC Hot

AC Neutral

Power Supply

Vout

Vreturn

10uF 0.1uF

Load

Scope

AC Ground

Figure 1. Ripple/Noise voltage test circuit

2.4 Overshoot

Any overshoot at turn on or turn off shall be less 10% of the nominal voltage value, all

outputs shall be within the regulation limit of section 2.0 before issuing the power good

signal of section 4.0.

2.5 Efficiency

2.5.1 Power supply typical efficiency is 80% min under 20% Load / 50% Load / 100%

Load at nominal input voltage of 115VAC .

2.5.2 Other Low Power System Requirements

To help meet the Blue Angel*, RAL-UZ 78, US Presidential executive order 13221, future

EPA requirements, and other low Power system requirements, it is recommended that

the +5VSB standby supply should be as efficient as possible. Standby efficiency is

measured with the main outputs off (PS_ON# high state). Standby efficiency should

be greater than 50% with a minimum loading of 100mA at input 115Vac. Pin 1W with a

minimum loading of 50mA at input 230Vac.

2.6 Remote on/off control

When the logic level "PS-ON" is low, the DC outputs are to be enabled.

When the logic level is high or open collector, the DC outputs are to be disabled.

2.3.3 Ripple/Noise voltage test circuit