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IOSR Journal of Electrical and Electronics Engineering (IOSR-JEEE)
IOSR Journal of Electrical and Electronics Engineering (IOSR-JEEE)

PreLab 4 – Emitter Follower (Week of May 4th)
PreLab 4 – Emitter Follower (Week of May 4th)

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Adaptive switching frequency buck DC–DC converter with high
Adaptive switching frequency buck DC–DC converter with high

... In order to design high efficiency DC–DC integrated circuits, numerous methods are introduced. Firstly, a well-known strategy of the sleeping mode by shutting down the unused partial circuitŒ2 is used to reduce the power consumption; it can only enhance efficiency in standby mode but no power can b ...
ULTRA SLIMPAK G168-0001 ® DC Powered AC Input Limit Alarm
ULTRA SLIMPAK G168-0001 ® DC Powered AC Input Limit Alarm

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MC34164 MC33164 Micropower Undervoltage Sensing Circuits

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TAP 128- 3: Energy stored in a capacitor and the potential difference
TAP 128- 3: Energy stored in a capacitor and the potential difference

... provides an essential link to temperature rise and thus the energy stored by the capacitor. It is advisable to discuss in advance how to analyse the data recorded. Be careful to shield the apparatus from draughts, as they affect the final temperature rise obtained. Ensure the ‘cold junction’ of the ...
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TAP 128- 3: Energy stored in a capacitor and the potential difference
TAP 128- 3: Energy stored in a capacitor and the potential difference

... provides an essential link to temperature rise and thus the energy stored by the capacitor. It is advisable to discuss in advance how to analyse the data recorded. Be careful to shield the apparatus from draughts, as they affect the final temperature rise obtained. Ensure the ‘cold junction’ of the ...
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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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