月別アーカイブ：2022年12月

: [Zener Diode] What is Resistance Rz (Impedance Zz)?
2023/1/24
This article explains "Resistance (Impedance) of Zener Diode". In the zener diode, when the zener current \(I_Z\) changes, the zener voltage \(V_Z\) changes slightly. The slope of the Zener voltage \(V_Z\) and the Zener current \(dV_Z/dI_Z\) is called the resistance (or impedance) of zener diode. Now, I will explain "Resistance (Impedance) of Zener Diode" in detail using diagrams. Resistance (Impedance) of Zener Diode The above figure shows the "Zener current \(I_Z\)-Zener voltage \(V_Z\) characteristic" of the zener diode. Ideally, the zener voltage \(V_Z\) of the zener diode should remain constant even when the zener current \(I_Z\) changes. In reality, however, ...

: Temperature Coefficient of Zener Diode
2023/1/24
Regarding the temperature coefficient of zener diode: This article will explain the information below. Characteristics of Temperature Coefficient of Zener Diode Method of Temperature Compensation of Zener Diode Characteristics of Temperature Coefficient of Zener Diode The zener voltage of a zener diode varies with temperature. Depending on the magnitude of the zener voltage, a zener diode may have a positive or negative temperature coefficient. Those with a Zener voltage higher than around 5V have a positive temperature coefficient, so the zener voltage increases as the temperature rises. On the other hand, those whose zener voltage is lower than around 5V ...

: [Zener Diode] What is Reverse Current (Leakage Current)?
2023/1/24
The reverse current in a zener diode is the current that flows in a minute amount when a reverse voltage is applied. Regarding the reverse current in a zener diode: This article will explain the information below. Reverse Current of Zener Diodes How reverse current is described on the datasheet Reverse Current (Leakage Current) of Zener Diode The above figure shows the "current-voltage characteristic" of a zener diode. In the "current-voltage characteristic," the horizontal axis represents the voltage applied to the zener diode and the vertical axis represents the current flowing through the zener diode. When the reverse voltage (the ...