FLZ6V2B Datasheet/PDFFLZ6V2B Application Field and Working Principle
The FLZ6V2B is part of the single Zener diode range. It is a fast, small signal low current Zener diode, which is primarily used as a switching diode. This type of diode is particularly used in a wide range of applications as it integrates excellent switching characteristics, low voltage operation and high current handling capabilities.
The single Zener diode is usually made of doped semiconductor material, and it has two distinct types of PN junctions. It is a heavily doped PN junction which is made to breakdown when a reverse bias voltage is applied. In this state, a short reverse current flows through the diode, thus causing the voltage to clamp at a steady level which is referred to as the breakdown voltage. This voltage is the Zener voltage and it is the specific parameter that is specified in the diode’s datasheet.
In its normal operating state, the diode is reverse biased and hence the Zener diode will be reversed biased when a higher voltage is applied. This high reverse bias voltage will cause the Zener diode to break down, resulting in a low voltage drop (often around 0.4 volts). The conduction of current across the diode is therefore limited to the low voltage drop, allowing for its use in various switching applications.
The FLZ6V2B is most commonly used in a variety of converters, voltage regulators, power regulators and switching power supplies. With the breakdown voltage of 6 volts, the Zener diode can function as a resistor, while its tolerance characteristics ensure that it can accurately regulate the voltage. This device is also suitable for high temperature operation (up to a maximum of 125°C) and its small footprint makes it a preferred choice for these applications.
In essence, the Zener diode can be seen as a form of current limiting device. Whenever a higher voltage than the breakdown threshold is present, it will activate the low current path which results in a controlled current flow, instead of a potentially uncontrollable voltage spike. This is due to the PN junction acting like a rectifier, wherein the current flows in only one direction.
The linear nature of the breakdown voltage of a single Zener diode also makes it ideal for use in Class AB amplifiers, subtractors and slopes switching. In these applications, it functions as a constant current source and provides an output that is independent of the input. This is especially useful in analog to digital converters, as it allows for a more accurate representation of the input signal’s voltage.
In conclusion, the FLZ6V2B single Zener diode is a reliable switching device and is suitable for use in a wide range of applications. It is capable of providing fast response times and ensures excellent stability, making it an excellent choice for all types of current limiting, voltage regulation and protection operations.