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Part of the output control for a power supply. A special type of inductor with a very square hysteresis loop. Used as a regulating switch to control the output voltage.
See Air Gap.
Adjusting the output voltage by a specified amount for system testing or other use.
Two or more regulated power supplies connected such that one (the master) controls the others (the slaves).
1) The highest allowable output rating specified for any or all outputs of a power supply (PSU) under specified conditions including duty cycle, period and amplitude.
2) The highest specified output power rating of a power supply (PSU) specified under worst case conditions.
The average length of time between system failures, exclusive of infant mortality and rated end-of-life. Established methods of calculating MTBF are described in the most recent edition of Mil Handbook 217 or according to Telcordia. Two key factors which affect the MTBF are the ambient temperature at which the power supply is used and the component count. Adding components that actually increase the reliability of a unit (such as clamping diodes, snubbers, etc.) can lower the calculated MTBF figure. It is important to note that this figure is vulnerable to 'specmanship' from some manufacturers who may wish to make their power supplies look better than they should be.
Acronym for Multiple Efficiency Gain.
SI prefix multiplier. Multiplies by 106. So 1 MHz = 1 x 106 Hz = 1000000 Hz. Written as 'mega'. Abbreviated to 'M'.
Common type of Varistor. A two terminal device with a resistance which is high at low voltages and low at high voltages.
SI prefix multiplier. Multiplies by 10-12. So 100 pF = 100 x 10-12 F. Written as 'pico'. Abbreviated to 'p'.
SI prefix multiplier. Multiplies by 10-3. So 100 mF = 100 x 10-3 F = 0.1 F. Written as 'milli'. Abbreviated to 'm'.
The lowest current that must be drawn from a power supply (PSU) for the power supply to operate within specification.
The lowest ambient temperature at which the power supply (PSU) will continuously operate safely and within specifications.
The lowest ambient temperature at which a power supply (PSU) will turn on and operate safely (although not necessarily to full specification).
Negative terminal of a power supply (PSU).
A power supply (PSU) made up of a number of separate building blocks such as output modules. Each module is usually selectable to closely match the requirements. Normally, each module is galvanically isolated. Lambda's Vega, NV-350 & NV 700 are industry leading examples of modular power supplies.
Acronym for Metal Oxide Semiconductor Field Effect Transistor.
Abbreviation for Metal Oxide Varistor.
Abbreviation for Multi-Resonant Topology.
Abbreviation for Mean Time Between Failure.
Abbreviation for Mean Time to Repair.
A meter capable of measuring current, voltage and resistance.
A technology introduced with Lambda's NV-Power range of products to achieve industry leading efficiency for multiple-output power supplies. Efficiency improvements at various stages of the power supply multiply together producing the compound effect of Multiple Efficiency Gain.
A power supply (PSU) with two or more outputs.
A switched mode power supply topology used in modern design, high efficiency, switched mode power supplies. Rather than using magamp post regulators and two-stage conversion, MRT uses closed loop control of the main outputs, a single conversion stage and auxiliary channels employing high efficiency dc-dc post regulation. The inherent low internal voltages on the secondary side allow the use of low voltage synchronous rectifiers with much lower losses, thus improving the efficiency. This topology allows the use of smaller inductors and wound components. The use of MRT over more traditional magamp regulation can offer up to 5% efficiency improvement for multiple output power supplies. Lambda's NV-Power range utilises MRT to provide units which have high efficiency.