line and load regulation of zener diode experiment pdf

Line and load regulation of zener diode experiment pdf

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Published: 30.05.2021

Zener diode

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The Zener diode is like a general-purpose signal diode. 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 currents. Avalanche Breakdown : There is a limit for the reverse voltage. Reverse voltage can increase until the diode breakdown voltage reaches. This point is called Avalanche Breakdown region.

Zener diode

It has higher gain, frequency, and voltage ratings. The voltage flowing in the zener diode of a regulator circuit is a negative voltage or that its electrons flowing. By passing a small current through the diode, close to 0 A, from a voltage source, the zener diode conducts sufficient current to maintain a voltage drop at Vout. Zener diodes except you do not regulate by dumping the maximum load into the Zener diode; rather you regulate the series PWM with an inductor current and pulse and compare that voltage and current with a stable current into a low-power Zener diode, programmable Zener diode, or an LED voltage. Features: Zener Voltage: 3.

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Zener diodes are a special kind of diode which permits current to flow in the forward direction. What makes them different from other diodes is that Zener diodes will also allow current to flow in the reverse direction when the voltage is above a certain value. This breakdown voltage is known as the Zener voltage. In a standard diode, the Zener voltage is high, and the diode is permanently damaged if a reverse current above that value is allowed to pass through it. Zener diodes are designed in a way where the Zener voltage is a much lower value.

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Load regulation is the capability to maintain a constant voltage or current level on the output channel of a power supply despite changes in the supply's load such as a change in resistance value connected across the supply output. Load regulation of a constant-voltage source is defined by the equation: [3]. For a constant-current supply, the above equation uses currents instead of voltages, and the maximum and minimum load values are when the largest and smallest specified voltage across the load are produced. For switching power supplies, the primary source of regulation error is switching ripple, rather than control loop precision. In such cases, load regulation is defined without normalizing to voltage at nominal load and has the unit of volts, not a percentage.

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