What is zener diode? How is it used as voltage regulator?
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Zener Diode➙ A form of semiconductor diode in which at a critical reverse voltage a large reverse current can flow.
▶Uses of Zener Diode are:-
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❖ To voltage references & as shunt regulators to regulate the voltageacross small circuits.
❖ It conducts when the voltage reaches the diode's reverse breakdown voltage.
❖ It behaves as battery during ON state.
❖ It always operated in its reverse biased condition.
❖ It can be used as a voltage regulator or to provide voltage reference.
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Thanks...✊
▬▬▬▬▬▬▬▬▬▬▬▬☟
Zener Diode➙ A form of semiconductor diode in which at a critical reverse voltage a large reverse current can flow.
▶Uses of Zener Diode are:-
===========================⤵
❖ To voltage references & as shunt regulators to regulate the voltageacross small circuits.
❖ It conducts when the voltage reaches the diode's reverse breakdown voltage.
❖ It behaves as battery during ON state.
❖ It always operated in its reverse biased condition.
❖ It can be used as a voltage regulator or to provide voltage reference.
_________
Thanks...✊
Answered by
9
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=) ⏺️Zener diode = It is a special type of semiconductor diode , named after its inventor C. Zener . It is designed to operate under reverse bias in the breakdown region . Zener diode is fabricated by heavily doping both p - and n - sides of the junction .
Q.) How is it used as voltage regulator ?
Ans.) ⏺️ Principle =) When zener diode is used in reverse breakdown region , the voltage across it reamains practically constant equal to the breakdown voltage Vz for a large change in reverse current .
⏺️ Working =) In the figure , 16 Vin is unregulated input d.c. voltage whose fluctuations are to be regulated . For this zener diode is connected in reverse bias across a fluctuating d.c. input voltage Vin through a series resistance R . If the input voltage increases , the current through R and zener diode also increases . This increases the voltage drop across R without any change in the voltage across the zener diode . This is because in the breakdown region , zener voltage remains constant even the current in the zener diode changes . Similarly , if the input voltage decreases , the current hence the voltage across R decreases without any change in voltage of zener diode . When Vin changes , I and IR drop , change in such a way to keep V output = Vz always under all conditions .
Vin = IR + Vz .
and , I = Iz + IL
Thus , R = Vin - Vz / Iz + IL
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HOPE , IT HELPS ... ✌️
____________________________
____________________________
=) ⏺️Zener diode = It is a special type of semiconductor diode , named after its inventor C. Zener . It is designed to operate under reverse bias in the breakdown region . Zener diode is fabricated by heavily doping both p - and n - sides of the junction .
Q.) How is it used as voltage regulator ?
Ans.) ⏺️ Principle =) When zener diode is used in reverse breakdown region , the voltage across it reamains practically constant equal to the breakdown voltage Vz for a large change in reverse current .
⏺️ Working =) In the figure , 16 Vin is unregulated input d.c. voltage whose fluctuations are to be regulated . For this zener diode is connected in reverse bias across a fluctuating d.c. input voltage Vin through a series resistance R . If the input voltage increases , the current through R and zener diode also increases . This increases the voltage drop across R without any change in the voltage across the zener diode . This is because in the breakdown region , zener voltage remains constant even the current in the zener diode changes . Similarly , if the input voltage decreases , the current hence the voltage across R decreases without any change in voltage of zener diode . When Vin changes , I and IR drop , change in such a way to keep V output = Vz always under all conditions .
Vin = IR + Vz .
and , I = Iz + IL
Thus , R = Vin - Vz / Iz + IL
___________________
___________________
HOPE , IT HELPS ... ✌️
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