Operation process of voltage regulator diode

Operation process of voltage regulator diode

To understand the working principle of a voltage regulator diode, one only needs to understand the reverse characteristics of the diode. The fundamental characteristic of all crystal diodes is that they have a single guide. That is to say, the forward pressure is conductive, while the reverse pressure is not. There is a condition here that the reverse pressure does not exceed the reverse pressure resistance value of the pipe. So what is the result after exceeding the withstand voltage value? A simple answer is to burn the pipes. But this is not all the answers. The experiment found that by simply constraining the reverse current value (for example, by connecting a resistor in series between the diode and the power supply), the diode, although broken down, will not burn. Moreover, it was found that after the reverse breakdown of the diode, the current decreased from large to small, and the voltage only decreased slightly. It was only when it reached a certain current value that the voltage sharply decreased with the decrease of the current. It is precisely by utilizing this characteristic that people have created a voltage regulator diode. The key to using a voltage regulator diode is to design its current value.

The characteristic of a voltage regulator diode is that after breakdown, the voltage at both ends remains unchanged. In this way, when the voltage regulator is connected to the circuit, if the voltage at each point in the circuit changes due to fluctuations in the power supply voltage or other reasons, the voltage at both ends of the load will remain fundamentally unchanged.