In-line diodes are divided into many kinds, it can be said that in addition to the resistance capacitor external use more of a component, then what types of diodes?

1, voltage regulator diode

Voltage regulator diode, sometimes called Zener diode. The principle is to use the pn junction reverse breakdown state, the current varies over a wide range but the voltage remains basically unchanged. Voltage regulator diodes are graded by breakdown voltage, and can be used in series if you want to obtain a higher voltage, which can obtain a higher output constant voltage. For example, the 1N4620 voltage regulator 3.3V, 1N4625 voltage regulator 5.1V, etc., the power ranges from 200mW to 100W.

2. Light-emitting diodes

Made of compounds containing gallium (Ga), arsenic (As), phosphorus (P), etc. Gallium arsenide diode emits red light, silicon carbide diode emits yellow light, etc. This diode is driven forward, the working current is low, the current is relatively small, especially for the patch type, long life, can be a variety of colors of light, widely used in billboards and digital screen display and other occasions that need light.

3, rectifier diode rectifier diode can be imagined to be used for rectification, the use of single-direction conduction of AC rectification into DC output. For the rectifier diode in the ordinary regulated power supply, the reverse recovery time requirement of the cutoff frequency is not very strict, generally meet the large rectifier current and large reverse operating voltage, such rectifier diodes have 1NXX series, 2CZ series, etc. For the high frequency switching power supply, the rectifier diode with higher operating frequency and shorter reverse recovery time should be used, such diodes have RU series, V series, 1SR series and so on. For higher ones, consider using Schottky diodes for rectification. .

4. Diode for detection

Detection is to take out the modulation signal from the input signal, to the size of the rectification current, generally 100mA as the cut-off point, usually the output current less than 100mA called detection. Detection diodes are usually used in semiconductor radio, television and other small signal circuits.

5. Schottky diode

Schottky diode is a kind of low power consumption, ultra-high speed diode. Its main feature is that the reverse recovery time is very short, the minimum can reach a few nS, and its positive pilot voltage drop is only about 0.4V. It is widely used in large current rectifier diode, continuous current diode and protection diode. Some switching power supplies require Schottky diodes.

The above five commonly used, are classified according to the purpose, in addition to these are: Limiting diodes, modulating diodes, mixing diodes, amplifying diodes, switching diodes, varcasting diodes, frequency multiplication diodes, PIN diodes, avalanche diodes, Esaki diodes, fast turn-off diodes, damping diodes, transient voltage suppression diodes, in-line diodes, etc.