Working Of Zener Diode As Voltage Regulator Pdf Download image sound electrotechnique tunisie 6.2.5

Zener diode.ppt Upcoming SlideShare Loading in 5 1 1 of 9 Like this presentation? Why not share! Share Email pn junction and zener diode 12 clas1994where is the null load resistor voltage (ieThe Zener diode is like a general-purpose signal diodeNote that for load voltages up to 8V, a single zener diode can be usedThis breakdown point is referred as Zener voltagepp.95100

The Zener diode is therefore ideal for applications such as the generation of a reference voltage (e.gHence a negative temperature coefficient diode is used for compensationThe Electrical Engineering Handbook2 A voltage regulator circuit automatically maintains the output voltage of a power supply constant, regardless of i) a change in the loadii) a change in the source voltage + Transformer(V)S Filter Regulator VDC LOAD and rectifier - 3^ Diffenderfer, Robert (2005)

The depletion region formed in the diode is very thin (<1m) and the electric field is consequently very high (about 500kV/m) even for a small reverse bias voltage of about 5V, allowing electrons to tunnel from the valence band of the p-type material to the conduction band of the n-type materialIn such cases, a zener diode is used to provide a 3V reference to the Bluetooth deviceClick to view the Simulator >> Imax Maximum current for Zener diodeIf you continue browsing the site, you agree to the use of cookies on this website(1993)A large number of covalent bonds break resulting in formation of a large number of electron hole pairs and sudden increase in the reverse currentThe value of R must satisfy two conditions:Create a clipboard You just clipped your first slide! Clipping is a handy way to collect important slides you want to go back to later

ISBN0-8493-0185-8Fig 1: Zener diode2The Zener diode's operation depends on the heavy doping of its p-n junctionThe fact that the voltage across the diode in the breakdown region is almost constant turns out to be an important application of the zener diode as a voltage regulatorModern manufacturing techniques have produced devices with voltages lower than 5.6V with negligible temperature coefficients,[citation needed] but as higher-voltage devices are encountered, the temperature coefficient rises dramaticallypp.4548When connected in parallel with a variable voltage source so that it is reverse biased, a Zener diode conducts when the voltage reaches the diode's reverse breakdown voltageMcGraw HillIn this type of regulation, series resistance and load resistance are fixed, only input voltage is changing

Unbiased semiconductor diode An electric polarity or electric dipole is formed across the junction, causing flow of flux from n side to p sideAuthority control GND: 4190693-7 Approximate value of this field is about 2*10^7 V/mpp.710 The zener diode is typically connected reverse biased, in parallel with the loadAt some high current level the power dissipation of the diode becomes excessive and the part is destroyedThey are also used to protect circuits from over-voltage, especially electrostatic discharge (ESD)When biased in the forward direction it behaves just like a normal signal diode, but when a reverse voltage is applied to it, the voltage remains constant for a wide range of currentsThis filtered DC voltage is regulated by the diode to provide a constant reference voltage of 15V^ a b Dorf, Richard C., ed 3d39b66ab9

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