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LTC1732-4
LTC1732-4

... SEL (Pin 2): 4.1V/4.2V Battery Selection Input Pin. Grounding this pin will set the output float voltage to 4.1V per cell, while connecting to VCC will set the voltage to 4.2V per cell. For the LTC1732-4.2, the SEL pin must be connected to VCC. CHRG (Pin 3): Open-Drain Charge Status Output. When the ...
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IOSR Journal of Electrical and Electronics Engineering (IOSR-JEEE) ISSN: 2278-1676
IOSR Journal of Electrical and Electronics Engineering (IOSR-JEEE) ISSN: 2278-1676

... network unbalance, and harmonically distortions. Among the various types of wind turbines, the variable speed wind turbines based on the doubly fed induction generator (DFIG), which have many advantages over the fixed speed induction generators or fully fed synchronous generators with full-sized con ...
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... IMPORTANT: READ BEFORE REMOVING FIXTURE FROM CARTON. RETAIN FOR FUTURE REFERENCE. WARNING: Make certain power is OFF before starting installation or attempting any maintenance. BI-LEVEL SWITCHING (IF EQUIPPED) For Bi-level switching, the input leads to the fixture will be independently labeled to in ...
A repetitive-PI Current Controller for Boost Single Phase PFC
A repetitive-PI Current Controller for Boost Single Phase PFC

... in the past two decades have enabled the design and implementation of single phase ac-dc boost converters with close to unity power factor and much less input current distortion that generated by simple diode rectification circuits. Typical PFC schemes use two cascaded loops: the first loop aims to ...
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... Another way to view this is that the output is a frequency of approximately one-quarter of the clock that has been phase modulated. A constant frequency can be thought of as accumulating phase linearly with time at a rate equal to 2πf radians per second. Therefore, the average output frequency, whic ...
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... a loop filter, a voltage-controlled oscillator (VCO), and a frequency divider (including a prescaler) [1–3]. The phase detector compares the phase of the input signal against the divided phase of the VCO. The output of the phase detector is a measure of the phase difference between the two inputs. T ...
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... converter (VSCs) links the rotor circuit to the power grid. In the case of a low voltage at the grid side of the DFIG, transient overcurrents flow from the rotor circuit towards the rotor side converter (RSC). These over-currents can either trip the DFIG system out or damage its power electronic com ...
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... During recent years, the utilization of renewable energy sources has been promoted quickly to fulfill increasing energy demand and deal with global climate change. Since the distributed power generation by renewable energy has different characteristics with conventional power generation by fossil fu ...
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... 3x3 m size, and the complete collection happens in less than 1 s. Thanks to the built-in potential at the interface p-epi/p-substrate, the excess carriers created in the epi layer do not escape to the substrate during diffusion. The diodes have no active pixel adressing system, they are just conne ...
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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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