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A B C D E F G H I L M N O P R S T U V W

Pi Filter
Input filter consisting of two capacitors connected in parallel with a series inductance. Often used in converters to reduce input reflected ripple current.
Leakage Current
Current flowing from input to output or input to case of an isolated converter at a specified voltage level.
Life Test
Reliability test in which a converter is operated (typically under accelerated conditions) over some period of time in order to approximate its life expectancy.
Line Regulation of a constant current power supply
The change in the static value of DC output current resulting from a change in AC input voltage from low line to high line or from high line to low line.
Line Regulation of a constant voltage power supply
The change in the static value of DC output voltage resulting from a change in AC input voltage from low line to high line or from high line to low line.
Linear Regulation
Power supply regulation technique in which the regulating device (typically a transistor) is placed in series or parallel with the load. Voltage variations across the load are controlled by changing the effective resistance of the regulating device to dissipate unused power.
Load
Electronic components/circuits connected to the output pins of a converter. The characteristics (resistance, reactance, etc.) of the load determine the amount of power drawn from the converter.
Load Decoupling
Placement of filter components (typically uF capacitors) at the power terminals of the load in order to reduce noise.
Load Regulation of a Constant Current Power Supply
The change in the static value of DC output current resulting from a change in load resistance from short circuit to a value which gives maximum rated output voltage.
Load Regulation of a Constant Voltage Power Supply
The change in the static value of DC output voltage resulting from a change in load resistance from short circuit to a value which yields maximum rated output current.
Local Sensing
Using the output terminals of the converter to provide feedback to voltage regulation circuits.
Logic Inhibit/Enable
Signal (typically TTL/CMOS compatible) used to turn a power supply output on/off. Also called Remote On/Off.
Long Term Stability
Change in output voltage of a converter over time with all other factors (line, load, temp., etc.) remaining constant. Expressed as a percent, the output change is primarily due to component aging.
Low Line
Minimum value of input line voltage specified for normal converter operation.

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Absolute Maximum Ratings Adaptor Aging Ambient Temperature Auto-Parallel or automatic parallel Auto-Series or automatic series operation Base Plate Temperature Basic Insulation Battery Backup Breakdown Voltage Burn-in CB-Scheme CFM Canadian Standards Association (CSA) Case Case Temperature Common Common Mode Noise Conducted EMI Conduction Cooled Constant Current Power Supply Constant Voltage Power Supply Constant Voltage/Constant Current (CV/CC) with automatic crossover Constant Voltage/Current Limiting (CV/CL) with automatic crossover Convection Cooled Cross Regulation Crowbar Current Limit Knee Current Limiting Derating Dielectric Dielectric Withstand Voltage Differential Mode Noise Drift Dynamic Load Dynamic Response EMI Filter Efficiency Electromagnetic Interference (EMI) Electrostatic Discharge (ESD) Electrostatic Shield Enclosure Equivalent Series Inductance(ESL) Equivalent Series Resistance (ESR) Failure Mode Faraday Shield Fault Mode Current Federal Communications Commission (FCC) Floating Output Foldback Current Limiting Forced Air Cooling Free Convection Front End Full Load Ground Ground Loop Heat Sink Hi-Pot Test High Line Hold-Up Time Hot Plug-In Input Current Input Line Filter Input Surge Current Input Transient Input Voltage Range Inrush Current Inrush Current Limiting Insulation Insulation Resistance Internal Power Dissipation International Electrotechnical Commission (IEC) Isolation Isolation Voltage Leakage Current Life Test Line Regulation of a constant current power supply Line Regulation of a constant voltage power supply Linear Regulation Load Load Decoupling Load Regulation of a Constant Current Power Supply Load Regulation of a Constant Voltage Power Supply Local Sensing Logic Inhibit/Enable Long Term Stability Low Line Master/Slave Operation Maximum Load Mean Time Between Failure (MTBF) Minimum Load Minimum Operating Temperature N+1 Redundancy No Load Voltage Noise Nominal Value OTP: Over Temperature Protection Open Frame Open-Circuit Voltage Operating Temperature Range Output Current Limiting Output Impedence of a power supply Output Voltage Output Voltage Accuracy Output Voltage Range Overload Protection Overshoot Overvoltage Protection (OVP) Parallel Operation Periodic and Random Deviation (PARD) Pi Filter Polarity Post Regulation Power Density Power Factor Correction (PFC) Power Good Power Rating Pre-Regulation Primary Circuit Programmable Power Supply Radiated EMI Rated Output Current Redundant Operation Reference Reflected Ripple Current Regulation Remote Error Sensing or Remote Sensing Remote Programming Remote Programming Speed Remote Shutdown Resolution Return Reverse Voltage Protection Ripple and Noise SMBus Secondary Circuit Sense Line Series Operation Series Regulator Short Circuit Protection Shunt Regulator Six-Sided Shielding Soft Start Split Bobbin Winding Stability Standby Current Step Change Storage Temperature Range Technischer Uberwachungs-Verein (TUV) Temperature Coefficient Temperature Range Thermal Conductivity Thermal Gasket Thermal Joint Compound Thermal Protection Thermal Resistance Thermal Resistivity Thermal Shutdown Three-Terminal Regulator Topology Tracking Transient Transient Recovery Time Under Voltage Lock Out (UVLO) Undershoot Underwriters Laboratories (UL) UninterruptiblePower Supply (UPS) Verband Deutsher Elektrotechniker (VDE) Voltage Balance Warmup Drift Warmup Time Withstand Voltage
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