Table 1-1 defines the acronyms, conventions, and terminology that is used throughout the design guide.
Acronym, Convention/ Terminology
Alternative Low Power Mode, ALPM replaces the traditional Sleep Mode (ACPI S3) with a new sleep mode. An example of ALPM is with Microsoft* Windows Modern Standby* or Lucid Sleep with Google* Chrome*.
American Wire Gauge
Declared sound power, LwAd. The declared sound power level shall be measured according to ISO* 7779 for the power supply and reported according to ISO 9296.
Cubic Feet per Minute (airflow).
A waveform changes from one level to another in a steady fashion, without oscillation.
Mean time between failure.
The periodic or random signals over frequency band of 0 Hz to 20 MHz.
Computers that do not use Alternative Low Power Mode use traditional Sleep Mode (ACPI S3).
A condition in which the current demand on a supply output exceeds its rated output current. This commonly occurs if there is a "short circuit" condition in the load attached to the supply.
Power Factor Correction.
Peak-to-Peak Voltage Measurement.
PWR_OK is a “power good” signal used by the system power supply to indicate that the +5VDC, +3.3 VDC and +12VDC outputs are above the under-voltage thresholds of the power supply.
The periodic or random signals over a frequency band of 0 Hz to 20 MHz.
Rise time is defined as the time it takes any output voltage to rise from 10% to 90% of its nominal voltage.
The condition where the AC line voltage rises above nominal voltage.
VSB or Standby Voltage
An output voltage that is present whenever AC power is applied to the AC inputs of the supply.
Table 1-2: Support Terminology
The status given to items within this design guide, which are not required to meet design guide, however, some system applications may optionally use these features. May be a required or recommended item in a future design guide.
The status given to items within this design guide, which are not required to meet design guide, however, are required by many system applications. May be a required item in a future design guide.
The status given to items within this design guide, which are required to meet design guide and a large majority of system applications.