Intel
®
Entry Server Chassis SC5299-E TPS Glossary
Revision 3.1
Intel order number D37594-005
139
Word/Acronym Definition
Over-current A condition in which a supply attempts to provide more output current than the amount for which
it is rated. This commonly occurs if there is a ‘short circuit’ condition in the load attached to the
supply.
OVP Over Voltage Protection
PDB Power Distribution Board
PFC Power Factor Correction
PSU Power Supply Unit
PWOK A typical logic level output signal provided by the supply that signals the Server System that all
DC output voltages are within their specified range
RI Ring Indicate
Ripple The periodic or random signals over frequency band of 10 Hz to 20 MHz.
Rise Time Rise time is defined as the time it takes any output voltage to rise from 10% to 95% of its
nominal voltage.
Sag The condition where the AC line voltage drops below the nominal voltage conditions
SCA Single Connector Attachment
SDR Sensor Data Record
SE Single-Ended
SSI Server Standards Infrastructure
Surge The condition where the AC line voltage rises above nominal voltage.
THD Total Harmonic Distortion
UART Universal Asynchronous Receiver Transmitter
USB Universal Serial Bus
VCCI Voluntary Control Council for Interference
VSB or Stand By An output voltage that is present whenever AC power is applied to the AC inputs of the supply.