There are some important parameters to consider on how to select a fuse. These are the Current Rating, Ampere Square Seconds, Breaking Capacity and Voltage Rating to name some. These will be discussed below so keep on reading. Read also the fuse basic operation and fundamental for further information. A useful design practice in selecting a fuse which is also
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In this article I will discuss Fuse Operation and Principle. A fuse is a simple electrical part which consists of a wire and terminals on each end. It is plainly a passive device which protects the circuit in the event of a large current. When this happens, the fuse element will open and the circuit will become discontinuous. Fuse operation
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Current transfer ratio is comparable to BJT’s HFE or beta (β). This is the ratio of the optocoupler’s collector current to the forward current. Current transfer ratio is popular by its abbreviation CTR. CTR is simply the measure of the optocoupler’s transfer efficiency. If we recall the basics, optocoupler is a semiconductor device with a light source and a detector.
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Way back several years ago, power supply designers and engineers are continuously searching for innovation. Long time ago what is available is only the linear type power supply. A linear power supply will consume a lot of power in order to provide regulation. This huge power consumption sacrifices the efficiency of the power supply. Try to imagine if you are
READRelay is made up of two elements; the coil and the contact. The coil needs to be energized so that the contact will change state. For detailed analysis on how to drive the relay coil for it to energize read this. In this topic we will jump directly to relay kickback voltage analysis. As mentioned, relay has a coil. This coil
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Opto coupler CTR explanation is not well elaborated by other authors and before I was also having hard time of understanding what is it. Current transfer ratio or commonly known as CTR is the ratio of the collector current to the forward current of an optocoupler. It is synonymous to a current gain of a bipolar junction transistor. If this is the first
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We will discuss here the three main contributors of power losses of the MOSFET when used in switching converter or switch mode power supply. The main MOSFET efficiency factors are drain to source on state resistance, gate charge and the equivalent output capacitance. Drain to source on state resistance or simply RDSon has a positive temperature coefficient (increases with temperature
READMOSFET is not well discussed in the undergrads; much more how to designing MOSFET switch. MOSFET stands for metal oxide semiconductor field effect transistor. Actually it is easier than BJT if we are talking a switch circuit. Nowadays MOSFET is very popular in circuit designs. Such in automotive, power supply and general electronics as a low side and high side
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One of the usual applications of optocoupler is to provide isolation between two ground reference. That is why it is often seen in power supply feedback circuit. How to analyze optocoupler in feedback system is to discussed in this article. Keep on reading below. How to analyze optocoupler in feedback system is not as difficult as you think. However, the lack
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In this article I will teach Mathcad Step by Step Tutorials for Beginners. Advance topic will be discussed in another article. There are two parts on this article. The first part is about software familiarization while the second part is about Mathcad computations. Mathcad Step by Step Tutorials for Beginners Part 1: Software Familiarization Open Mathcad software. A blank page
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