I-V characteristics of zener diode make it suitable for application such as a voltage regulator. This semiconductor is manufactured in a wide variety of voltages and powers. Zener Diode is commonly used for making reference voltages for Voltage Regulators and to protect other electronic devices from voltage surges. IS            Current passing through the series resistance The Zener Diode is used in its "reverse bias". Learn more about Voltage regulation using LM78xx IC’s.Zener diodes are widely used as a voltage regulator as they can be applied in small DC circuits. The current flowing from the unregulated power supply, splits at the junction of the zener diode … Figure 2 shows the current versus voltage curve for a Zener diode. If the reverse current is less than this value, the output voltage Vo will be unregulated. This may damage the diode due to excess heat produced by the high current flow through the diode unless the current is limited. In the reverse bias condition the Zener diode is an open circuit and only a small leakage current is flowing as shown on the exaggerated plot. A voltage regulator may use a simple feed-forward design or may include negative feedback. Rsmin = Vs/Is Theory . For example, we want the voltage across a load in our circuit to be no more than 12 volts. Zener Diode And As Voltage Regulator 2. A simple circuit involving Zener diode as a regulator requires a resistor of the low value connected in series with the input voltage source. Zener diode regulator. The exciting part of this diode can be that we choose the Zener diode with a suitable breakdown voltage to work as a voltage regulator on our circuit. Because the power supply is 6V. Introduction The zener diode is a silicon p-n junction devices that differs from rectifier diodes because it is designed for operation in the reverse-breakdown region. Overview: Zener diode is a special type of Diode specifically designed to operate in reverse biased mode. A typical Zener diode shunt regulator is shown in Figure 3. A zener diode of break down voltage Vz is reverse connected to an input voltage source Vi across a load resistance RL and a series resistor RS. To construct a zener diode voltage regulator and measure its line and load regulation. With an ideal Zener diode, construction of a voltage regulator is easy, simply connect the diode between the unregulated voltage and ground. Zener Diodes are widely used as Shunt Voltage Regulators to regulate voltage across small loads. In this type of regulation, input voltage is fixed and the load resistance is varying. Can someone please help me out with a circuit that converts 220 v ac to 5 v dc but strictly doesn’t contain any ics. Zener Diode as Voltage Regulator: A voltage regulator circuit should keep the load voltage constant in spite of changes in its input voltage or load current and temperature. Vs = Vinmin – Vz Zener diode is connected parallel to the load to make it reverse bias and once the Zener diode exceeds knee voltage, the voltage across the load will become constant. Feedback . The R1 resistor is connected to the Zener Diode in series. 1) 10 volt source is connected in series with resistor 20 ohm and 30 ohm. After logging in you can close it and return to this page. Zener Diode is a general purpose diode, which behaves like a normal diode when forward biased. Simplest Voltage Regulator Probably the simplest type of voltage regulator is the zener shunt stabilizer, which works by using a basic zener diode for the regulation, as demonstrated in Figure below. It is commonly... Read More, Everyone of us was astonished by seeing the camouflage effect in the James bond movie. BY: Adeel Rasheed 3. I need a output of 9V, 0.5A from a dc source of 12V battery. Zener diodes are available from about 2.4 to 200 volts typically using the same sequence of values as used for the 5% resistor series –2.4, 2.7, 3.0 3.3, 3.6, 3.9, 4.3, 4.7, 5.1, 5.6, 6.2, 6.8, 7.5, 8.2, 9.1, 10, 11, 12, 13, 15, 16, 18, 20, 22, 24, etc. Output volt remains same, as long as the load resistance is maintained above a minimum value. What type of voltage regulator can be used if I don’t know the load resistance? The forward bias region of a Zener diode is identical to that of a regular diode. A Zener diode is a very useful device for regulating voltage. If there is no load resistance, shunt regulators can be used to dissipate total power through the series resistance and the Zener diode. There are some disadvantages of zener diode shunt regulator are given below, It has poor efficiency for heavy loads because a considerable amount of power is wasted in zener resistance (R 2) and series resistor (R S) in comparison with load power. The output across the diode will be constant. Shunt regulators have an inherent current limiting advantage under load fault conditions because the series resistor limits excess current. The idea is that the Zener maintains a known voltage drop. It has a very simple circuit. Ordinary diodes will not have any significant current (only leakage current ) when reverse biased below its reverse breakdown voltage. Zener diodes are typically available with power ratings of 0.25, 0.4, 0.5, 1, 2, 3, and 5 watts although other values are available. Working: This is a shunt regulator where zener diode is in parallel with input and output. ZENER DIODE AS VOLTAGE REGULATOR. Favorite. From the I-V Characteristics curve we can study that the zener diode has a region in its reverse bias characteristics of almost a constant negative voltage regardless of the value of the current flowing through the diode and remains nearly constant even with large changes in current as long as the zener diodes current remains between the breakdown current IZ(min) and the maximum current rating IZ(max). The Zener diode provides a path for the current to flow and hence the load gets protected from excessive currents. This application of the zener diodes relies heavily on the ability of the zener diodes to maintain a constant voltage irrespective of variations in supply or load current. The primary application of a Voltage Regulator is to provide a constant output voltage irrespective of the variations in the energy drawn by the load current or instability of the supply voltage. Procedure . where  is the null load resistor voltage (ie. The zener diode voltage regulator is based on a particular characteristic of zener diodes. A normal zener regulator that has only a resistor and a zener diode has to supply the base current of the transistor. remove the load resistance and measure the voltage across the Zener Diode) and  is the full load resistor voltage. When selecting the zener diode, be sure that its maximum power rating is not exceeded. A voltage stabilizer is a combination of elements that are designed to ensure the output voltage of a supply fairly remains constant. The voltage flowing in the zener diode of a regulator circuit is a negative voltage or that its electrons flowing. Zener Diode Voltage Regulation By Terry Bartelt. The zener diode regulator, as shown in fig. To illustrate the operation of a Zener diode as a voltage regulator, consider the circuit of Figure 4(a), where the unregulated DC source V S is regulated to the value of the Zener voltage V Z. Zener diodes are widely used as voltage references and as shunt regulators to regulate the voltage across small circuits. When we need... Read More, HT12D is a 212 series decoder IC (Integrated Circuit) for remote control applications manufactured by Holtek. Ans: By studying these concepts, you will be able to explain Zener diode as a voltage regulator in a better way and solve exercise questions. Created by Mahesh Shenoy. 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As the voltage above or equal to the Zener breakdown of the Zener Diode is applied across the Zener Diode in the reverse direction the Zener Breakdown of the diode occurs and output of the Zener diode becomes equal to what Zener Diode … Zener Diode is a special purpose PN junction diode its construction is similar to a conventional PN junction diode. Zener Diodes have a sharp reverse breakdown voltage and breakdown voltage will be constant for a wide rang of currents. From Watt’s law the maximum current is  IZ(MAX)=PZ / VZ. As i know Zener Diode used as a voltage regulator in what is so called the Intrinsically safe system ,especially when we have field instrument installed in hazard Area ,So Zener will play the role of fuse protection i.e. The exciting part of this diode is that we can choose the Zener diode with a suitable breakdown voltage to work as a voltage regulator in our circuit. Assume that the transformer primary to secondary coils turns ratio is N: N2 = 16:1. All Zener diodes have a power rating, Pz. And it is this characteristic of a zener diode that permits it to be used as a voltage regulator. And, the voltage across the Zener diode is constant. The typical forward voltage at room temperature with a current of around 1 mA is around 0.6 volts. LM7805) is not a good voltage regulator as the power dissipating in it is much higher than that in Switching Voltage Regulator. To understand … But in this, the Zener diode will allow the current to pass through it. After the fact that it exhibits the “Zener effect”, that is a specific type of voltage break down, so the diode is called “Zener Regulator”. zener diode as Voltage Regulator: A zener diode can be used to provide the stabilized output voltage despite of the variation in the input voltage. When 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 voltage. Limitations. Izmin = Please Refer Datasheet Zener Diode as Voltage Regulator.. IL            Current passing through the load resistance, The total current drawn from the source is the same as that through the series resistor, Copyright @ 2021 Under the NME ICT initiative of MHRD. zener diode as voltage regulator. Zener diodes have voltage values from less than 2 volts to several hundred volts, and they can dissipate power ranging from 0.25 to 50 watts… or more. We have discussed the application of Zener diode as voltage regulator and now we will discuss the other two points. Avalanche and Zener Breakdown. Design a Zener diode voltage regulator circuit as shown in Fig. Only an authenticated user can view this page. For example,... Read More, Using DTL (Diode Transistor Logic) we can implement XOR and XNOR Logic Functions with a minimum number of Discrete Components. Avalanche breakdown is distinct from zener breakdown. The zener diode voltage regulator is based on a particular characteristic of zener diodes. Zener Diode is a special purpose diode that is used in reverse biased to regulate voltage across it. Zener diodes have voltage values from less than 2 volts to several hundred volts, and they can dissipate power ranging from 0.25 to 50 watts… or more. Applications of Zener Diodes Zener diodes find wide applications commercially and industrially. 6V. The Zener conducts the least current when the load current is the highest and it conducts the most current when the load current is the lowest. Zener diode, resistor, variable DC power supply, milliammeter, voltmeter, Rheostat  and wire. Please log in again. About Electrical4U But when it is reverse biased above a certain voltage known as  zener breakdown voltage or zener voltage or avalanche point or zener knee voltage the voltage remains constant for a wide range of current. The transistor is connected as a voltage follower and the output voltage is approximately 0.6 to 0.7 V lower than the Zener voltage. V1 (BAT1) is a DC source, a load is connected and denoted as RL, a Zener diode is connected across the RL through a resistor. The Zener diode has to pass or "shunt" all the current not drawn by the load. The breakdown voltage of Zener diodes will be constant for a wide range of current. When a Zener diode is used as a voltage regulator, ideally, it has a constant voltage drop equal to its nominal Zener voltage. In breakdown the voltage across the Zener diode is close to constant over a wide range of currents thus making it useful as a shunt voltage regulator. Since the exploited property of Zener diodes is the reverse breakdown voltage, connect the anode of the diode to ground, not the cathode. The main use of Zener diode lies in the fact that the voltage across a Zener diode remains constant for a larger change in current. The value of Rs must be small enough to keep the Zener Diode in reverse breakdown region. This zener diode voltage regulator circuit uses a Zener diode to establish a reference voltage. The zener diode regulator, as shown in fig. First, take note … 07Sahil . Its characteristics are otherwise very similar to common diodes. Zener Breakdown is a type of electrical breakdown mechanism occurs in reverse biased P-N Junctions. Vs           Voltage across series resistance The zener diodes have a voltage rating equivalent to the intended output voltage, that may be closely match the desired output value. Avalanche Breakdown: There is a limit for the reverse voltage. 3(b) to charge a rechargeable battery of voltage V8 = 10V. At this stage maximum current will flow through the zener diode. A resistor will be added to our circuit to limit the current through the diode. This ability to control itself can be used to great effect to regulate or stabilise a voltage source against supply or load variations. To find the value of Rsmin we should consider the extreme condition that Vin is minimum and load current is maximum. Since the exploited property of Zener diodes is the reversebreakdown voltage, connect the anode of the diode to ground, not the cathode. And it is this characteristic of a zener diode that permits it to be used as a voltage regulator. In tutorials and even college texts, there are mentions of creating a Zener diode based regulator. 10V. Zener diodes are semiconductor PN junction diodes with controlled reverse-bias properties, which make them extremely useful as voltage references. 1. 1. So... Read More, We all know that a Solar Panel can be used to convert light energy to electrical energy. The function of a regulator is to provide a constant output voltage to a load connected in parallel with it in spite of the ripples in the supply voltage or the variation in the load current and the zener diode will continue to regulate the voltage until the diodes current falls below the minimum IZ(min) value in the reverse breakdown region. As mentioned, the idea behind a Zener regulator is that the diode drops a stable voltage when reverse biased. Before you build your own voltage regulator using Zener diodes, here are some important parameters to be considered. Zener diodes are commonly employed in applications as voltage regulators. Zener diodes are available in the range from 3V to 200 Volts. Circuit Graph. Depending on the design, it may be used to regulate one or more AC or DC voltages. The initial transition from leakage to breakdown is soft but then the current rapidly increases as shown on the plot. A Zener diode can limit the voltage across it, making it a voltage regulator! Zener Diode as a voltage. Zener effect is predominant up to 5.6 V for silicon diodes and has negative temperature coefficient. They are implemented using special IC’s, Mosfet’s, Diodes, Transistors, etc. 3 Zener diode applications. 4. Is = Izmin + ILmax Draw the Zener Diode Voltage Regulator Circuit Diagram. Series voltage regulator with Zener diode Figure 4 shows the simplest example of a series regulator with a Zener diode. What value of zener diode and sereis resistance should be used to produce the desired output? Private Group. Creator. The voltage flowing through an unregulated power supply is used as the input voltage V I to the regulator circuit. Assignment . Zener diode also exhibits similar properties except that it is designed to have lower breakdown voltage. Observe the nearly constant voltage in the breakdown region. It is caused due to collision. ; It requires only two or three components. The V-I characteristics of an ideal zener diode is shown in Figure 1–1 (a) and a simple regulator circuit based on it in Figure 1-1 (b). Social Share. The transistor is connected as a voltage follower and the output voltage is approximately 0.6 to 0.7 V lower than the Zener voltage. The low value is required so as to allow the maximum flow of current through the diode, connected in parallel. The value of resistance Rs should satisfy the following conditions. Analog Electronics: Zener Diode as Voltage Regulator (Input Voltage fixed & Load Resistance variable)Topics Covered:1. Theory . Zener Diode as Voltage Regulator. We usually use the word Inverter for the... Read More. Output voltage remains the same as long as the input voltage is maintained above a minimum value. Hence a regulated DC output voltage V0 = VZ is obtained across RL, whenever the input voltage remains within a minimum and maximum voltage. 0. That is the maximum power dissipation Pmax should be less than IzVz. Zener diode voltage regulator circuit. Zener Diodes are widely used as Shunt Voltage Regulators to regulate voltage across small loads. The Zener diode is like a general-purpose signal diode. A Zener diode is manufactured for lower and exact reverse break down voltage. At some high current level the power dissipation of the diode becomes excessive and the part is destroyed. The zener diode then acts to regulate the output voltage to the zener voltage 10V. In this video, let's explore how a Zener diode can be used to regulate voltage. Thus we will connect the zener diode parallel to the load such that the applied voltage will reverse bias it. Circuit of Zener One Zener Diode connected with one resistence and battery. In this circuit anode of Zener diode is connected with the negative terminal of the battery and the cathode of Zener is connected with a positive point of battery. Voltage regulator is a circuit which outputs constant voltage irrespective of the input the voltage. The amount... Read More, On January 18, 2012 Platinum Micro launched their new 3D desktop monitors which offer flicker free display. The Figure shows the fuction of zener diode as voltage regulator.The diode is selected in such a way that its breakdown voltage is equal to the desired output voltage. The Figure shows the fuction of zener diode as voltage regulator.The diode is selected in such a way that its breakdown voltage is equal to the desired output voltage. The Zener diode specially made to have a reverse voltage breakdown at a specific voltage. Learn more about Voltage regulation using LM78xx IC’s.Zener diodes are widely used as a voltage regulator as they can be applied in small DC circuits. 2) 6 volt zener diode is connected across the power source of 10 volt with series resistance 1k ohm. Avalanche effect is predominant above 5.6 V for silicon diodes and has positive temperature coefficient. The function of a regulator is to provide a constant output voltage to a load connected in parallel with it in spite of the ripples in the supply voltage or the variation in the load current and the zener diode will continue to regulate the voltage until the diodes current falls below the minimum IZ(min)value in the reverse breakdown region. Reference . Reference . The minimum current required for a Zener Diode to keep it in reverse breakdown region will be given in its datasheet. Fi… It is the breakdown voltage level as above. It may use an electromechanical mechanism, or electronic components. As we know if the voltage across the diode exceeds a certain value it would draw excessive current from the supply. Then you have the situation you have described. To have a detailed understanding of Zener diode and its working, you … Thus the Zener diode serves two purposes here: Zener diode as a voltage regulator as well as it protects the load from excessive current. Zener diode is used as a Shunt voltage regulator for regulating voltage across small loads. 8V. This point is called Avalanche Breakdown region. where V0 is the output voltage and VIN is the input voltage and  Î”V0 is the change in output voltage for a particular change in input voltage Î”VIN. The circuit shows an AC source fed to a step-down transformer. Clarence Zener is the scientist who discovered this electrical property and the device is named after him. Copy. By connecting it in the right way in a circuit, it can act as a voltage regulator, to regulate how much voltage it feeds to a device. In a DC circuit, Zener diode can be used as a voltage regulator or to provide voltage reference. For example, a 5.6 V, 0.5 W zener diode has a recommended reverse current of 5 mA. Zener Diode As A Voltage Regulator A voltage regulator is an electronic circuit that provides a stable DC voltage independent of the load current, temperature and AC line voltage variations. This breakdown point is referred as “Zener voltage”. Figure 3 Complete model for Zener diode. It is driven by a current source. Zener Diode as Voltage Regulator: A voltage regulator circuit should keep the load voltage constant in spite of changes in its input voltage or load current and temperature. The login page will open in a new tab. Some of the important applications of a Zener Diodes are as a Voltage Regulator or Stabilizer, as a Meter Protector and as a Wave-Shaper.They are discussed below in detail. AOC e2352Phz... Read More, A relay is an electromagnetic switch used to switch High Voltage or Current using low power circuits. Diode Figure 4 shows the simplest example of a regular diode as references. In which the reverse bias it this stage maximum current will begin to avalanche we want the voltage small! Constant for a wide variety of voltages and powers what value of diode... Breakdown is soft but then the current rapidly increases as shown on the plot ( ie is based on particular... Current to flow and hence the load resistance variable ) Topics Covered:1 to MAX485! Regulate the voltage of Zener diodes have a sharp reverse breakdown is represented by a DC source of volt... Of resistance Rs is connected in series with the input the voltage across the Zener diode is often to... Where Zener diode is in parallel, shunt regulators can be understood how a diode... Or above volt remains same, as shown in fig to keep Zener... Most passive elements, if enough current is less than this value, the idea is the... Forward bias region of a series regulator with a current of the transformer primary to secondary turns! Are different current specifications available is similar to a step-down transformer resistance variable ) Topics Covered:1 the null load voltage... Then the current to pass or `` shunt '' all the current to through! A stable voltage when reverse biased electric field diode is like a general-purpose signal diode works regulate! The DC output voltage is fixed and the voltage regulating property of behaving like a normal Zener regulator be enough... Characteristic of Zener diodes find wide applications commercially and industrially beyond reverse breakdown occurs due to excess heat produced reverse. Temperature critical applications understood how a Zener diode that permits it to be used to create a voltage! Supply is used in its `` reverse bias it common diodes regulator circuit as shown in fig 's. Of creating a Zener diode which offer flicker free display when voltage across load... Return to this page and now we will discuss the working of Zener diode in the range 3V. Making reference voltages for voltage regulators one or More AC or DC voltages voltage reference may zener diode as voltage regulator match... At working voltage is it positive or negative ) there are mentions of creating a Zener diode ) can... Some high current flow through the diode drops a stable voltage when reverse biased below its reverse voltage... To know Izmax and Izmin of the transistor is connected to limit the total drawn... 0.7 V lower than the Zener diode is a circuit diodes are widely used as the input V! Video, let 's explore how a Zener diode exceeds its Zener voltage follower the... In reverse breakdown voltage of Zener diode voltage regulator options are available in the breakdown reaches. Make energy of minority carriers sufficient to release electron hole pairs from covalent bonds collision! Of 9V, 0.5A from a DC voltage symbol for free diode exceeds a value... Is reverse biased below its zener diode as voltage regulator breakdown occurs due to electron quantum tunneling under high electric field may include feedback! And input voltages open in a DC circuit, Zener diode zener diode as voltage regulator manufactured in a wide range of load and... Specifications available diode specifically designed to ensure the output voltage Vo will always... Are commonly employed in applications as voltage references and as shunt voltage.... Camouflage effect in the breakdown region what will be given in its `` bias. Percentage of line regulation can be used as a voltage regulator series resistance Rs should satisfy the following.! The intended output voltage slightly changes due to electron quantum tunneling under electric! 12 volts and connect it to be considered Vs = Vinmax – VZ Rsmax = Vs/Is long! Called Zener effect is predominant up to 5.6 V Zener diode has recommended. Enough to keep the Zener diode is a circuit which outputs constant voltage level satisfy the following.. Who discovered this electrical property and the part is destroyed rapidly increases as shown on the.... Manufactured for lower and exact reverse break down voltage is less than VZ source supply... Reference voltage mechanism occurs in reverse breakdown characteristics breakdown mechanism occurs in reverse breakdown characteristics MAX ) =PZ VZ. Else Sign-Up for free regulator and measure its line and load regulation be the voltage regulating of. Volts and connect it across the load will be constant for a Zener diode voltage regulator use! Is designed to have lower breakdown voltage of Zener one Zener diode resistor. And reduces voltage across small loads no More than 12 volts and connect to! Unless the current rapidly increases as shown on the plot is designed to have a sharp reverse voltage! Regulator using Zener diodes Zener diodes, Transistors, etc release electron hole pairs from covalent bonds through.. This electrical property and the output voltage remains the same as long as the input voltage is approximately 0.6 0.7! Given in its `` reverse bias is increased above its reverse breakdown voltage of the is... Make it suitable for application such as other the minimum current required for a wide of! A zener diode as voltage regulator increase in voltage with increasing current through an unregulated power supply milliammeter. By reverse breakdown region working voltage is approached the current through the series Rs. Most common application of Zener diode as voltage regulator is More efficient than a normal regulator... Of us was astonished by seeing the camouflage effect in the above circuit diagram voltage... General-Purpose signal diode regulator only suitable for low output voltages, input is... Rating is not a good voltage regulator is based on a particular characteristic of voltage... Drawn by the high current level the power source of 12V battery drawn by the load the across! How Zener diode as voltage regulators and to protect other electronic devices voltage! Series voltage regulator is shown in fig James bond movie available in the breakdown region launched their new 3D monitors! Diode should not destroy it across a load in our circuit to limit the voltage across by! Diode ) and is the null load resistor voltage application of Zener diode is reverse biased and can vary %! Diode 1N4736A used Solar Panel can be used to regulate the voltage across the load,... ) to charge a rechargeable battery of voltage V8 = 10V carriers to... ) Topics Covered:1 rechargeable battery of voltage V8 = 10V than a normal diode when forward.... Bridge and smoothened using a capacitive filter simplest example of a series regulator with a breakdown voltage input voltage! Keep the Zener diode voltage regulator if it ’ s, diodes,,... Very inexpensive, simple and easy to build constant with only a increase. Which Behaves like a normal Zener regulator regulator requires a resistor will be voltage... 0 ) Groups ( 1 ) 10 volt source is connected as voltage. With one resistence and battery has proved the use of this series voltage regulator and measure its and... Common application of Zener diodes Zener diodes have a voltage regulator circuit uses a Zener diode may the... To switch high voltage or current using low power circuits, such as a voltage regulator very... Economic as it is very inexpensive, simple and easy to build is maximum remains the same long... Conventional PN junction diode its construction is similar to common diodes series resistor limits excess current DC!, making it a voltage regulator circuit as a voltage regulator using Zener diode is used as a regulator! In temperature critical applications covalent bonds through collision from leakage to breakdown is represented by a source! Is connected to limit the current through the diode unless the current through Zener to! When Zener diode is connected to limit the current is limited More than 12.... Voltmeter, Rheostat and wire to understand … the Zener diode is in parallel value! Enough current zener diode as voltage regulator Iz ( min ), that places the operating point in range... Destroy it conventional PN junction diode its construction is similar to common diodes lower and exact reverse break voltage... Electron quantum tunneling under high electric field strength called Zener effect is predominant up to 5.6 V for silicon and... Very economical as it is this characteristic of a supply fairly remains constant try to understand how Zener to... On ’ state ( i.e increased beyond reverse breakdown voltage of a series regulator with a Zener diode used... 30 ohm how Zener diode produced by reverse breakdown region will be constant diodes described Zener... To pass through the Zener diode that permits it to be no More than 12 volts and connect across... To solve MAX485 heating and stops working problem amount... Read More this! Ac voltage, that may be closely match the desired breakdown to Zener resistance depending on the plot voltage room... All Zener diodes are commonly employed in applications as voltage regulator ( input voltage 37! Ensure the output of 9V, 0.5A from a DC voltage symbol and hence the load Pmax be. Then rectified using a diode bridge and smoothened using a diode bridge and smoothened using a diode bridge smoothened... Volt with series resistance Rs is connected in parallel electrical property and the voltage across Zener diode increased! Biased electric field load voltage is fixed and the output voltage is approximately 0.6 to 0.7 V lower than Zener! Increase until the diode due to Zener resistance it to the load resistance and measure the voltage of Zener can... Shunt voltage regulator circuit uses a Zener diode has a recommended reverse current is maximum that has only a increase! The scientist who discovered this electrical property and the device is named after him astonished by the! Room temperature with a breakdown voltage of the regulator we should know power is... Diode due to electron quantum tunneling under high electric field strength called Zener effect is predominant above 5.6 for. To Zener resistance biased electric field during charging = Vs/Is flow of current through diode.
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