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Regulating Pulse Width Modulator
Regulating Pulse Width Modulator

1 - Pui Chor Wong
1 - Pui Chor Wong

... • Kirchoff’s Law of Voltages (KVL) – Sum of all voltages in a complete circuit is zero – Choose arbitrary loop of a circuit (CW or CCW) – If encounters (+) terminal 1st then (-), then its a voltage drop. (usually a resistor) – If encounters (-) terminal 1st then (+) which is a voltage increase. (usu ...
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... accumulate on the human body and test equipment and can discharge without detection. Although the ADR512 features proprietary ESD protection circuitry, permanent damage may occur on devices subjected to high energy electrostatic discharges. Therefore, proper ESD precautions are recommended to avoid ...
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... an internal dropping resistor located in the analog circuitry on the board, or by using an external precision dropping resistor between 90-210 Ω. The external dropping resistor is typically located on the terminal blocks of an assembly panel within the cabinet. If the external resistor option is uti ...
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RT8030 - Richtek Technology

High Power Semiconductor Switches and Products
High Power Semiconductor Switches and Products

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... 20. A free wheeling diode in a phase controlled rectifier a) Enables the inverter operation b) Smoothens the load current consequently the smoothing inductance required is small c) Makes the converter draw additional reactive power d) Impairs the line power factor 21. A phase controlled converter is ...
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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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