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Electric Current
Electric Current

... • The rate at which energy is delivered to a resistor ...
AD8016 Low Power, High Output Current xDSL Line Driver Data
AD8016 Low Power, High Output Current xDSL Line Driver Data

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... Shut off the power and disconnect the power supply from the circuit. Carefully, without moving the arm of the potentiometer, measure the resistance between the upper and center terminal and then between the lower and center terminal. Record these values. ...
P85445D
P85445D

... NOTE: Make sure that the total RMS current required by all appliances that are connected to the system’s primary and secondary power sources, NAC Circuits ,DSM Sync Modules or Wheelock Power Supplies do not exceed the power sources’ rated capacity or the current ratings of any fuses on the circuits ...
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SLP 05 - Cary Audio

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Switched-mode power supply



A switched-mode power supply (switching-mode power supply, switch-mode power supply, SMPS, or switcher) is an electronic power supply that incorporates a switching regulator to convert electrical power efficiently. Like other power supplies, an SMPS transfers power from a source, like mains power, to a load, such as a personal computer, while converting voltage and current characteristics. Unlike a linear power supply, the pass transistor of a switching-mode supply continually switches between low-dissipation, full-on and full-off states, and spends very little time in the high dissipation transitions, which minimizes wasted energy. Ideally, a switched-mode power supply dissipates no power. Voltage regulation is achieved by varying the ratio of on-to-off time. In contrast, a linear power supply regulates the output voltage by continually dissipating power in the pass transistor. This higher power conversion efficiency is an important advantage of a switched-mode power supply. Switched-mode power supplies may also be substantially smaller and lighter than a linear supply due to the smaller transformer size and weight.Switching regulators are used as replacements for linear regulators when higher efficiency, smaller size or lighter weight are required. They are, however, more complicated; their switching currents can cause electrical noise problems if not carefully suppressed, and simple designs may have a poor power factor.
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