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MAX5441–MAX5444 +3V/+5V, Serial-Input, Voltage-Output, 16-Bit DACs General Description
MAX5441–MAX5444 +3V/+5V, Serial-Input, Voltage-Output, 16-Bit DACs General Description

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... Using a transistor as a switch (on or off) produces minimal heat, while using a transistor to directly control the voltage to a load creates a lot of heat. The more time spent by the transistor in the analog mode, the more heat it produces. Specifications for 800µS rise or fall time require the tran ...
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... The capacity of a battery is measured in Amp Hours (Ah). Basically, a battery with a capacity of 1Ah will provide a current of 1A for 1 hour. Capacity (Ah) = Current (A) x Time (hours) 1) A battery provides a current of 2A for 2 hours. What was its capacity? 2) Another battery has a capacity of 10Ah ...
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... continue several tens of seconds. In the same power supply very fast transients may occur during a load breakdown, e.g., a sparking in an X-ray tube. In long-pulse applications, a DC voltage is established in anywhere from microseconds to many milliseconds, the latter being the case for computer tom ...
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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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