1N5819 Schottky Diode : Pin Configuration & Its Applications

The Schottky diode or Schottky Barrier diode is designed with metal to the silicon-based junction to provide special characteristics. There are different Schottky diodes are available based on the manufacturers. From that, 1N5819 Schottky diode is a polarized electronic component including a band that denotes the cathode terminal of the diode.

The 1N5819 Schottky diode provides less forward voltage drop & maximum switching speed, so it is applicable where the high frequency is required like DC-DC converters, inverters, etc. This article discusses an overview of the 1N5819 Schottky diode and its working with applications

What is 1N5819 Schottky Diode?

The 1N5819 Schottky Diode includes 600mV of forward voltage drop & 1A forward current. As compared to a normal PN-junction diode, this diode has a less forward voltage drop across it once 1A of current is supplied through it and fast switching speeds. So this diode is used in protection circuits that have reverse polarity and high frequency-based switching circuits.

The reverse blocking voltage for 1N5819 is about 28V only which is kind of a downside for all Schottky diodes so make sure this does not affect the performance of your circuit.

The construction of this diode can be done by combining the metallic & semiconductor material. The anode terminal of this diode can be formed through the metallic material whereas the cathode terminal is made with semiconductors.

Pin Configuration

The pin configuration of 1N5819 Schottky Diode & its symbol are shown below. This diode includes two terminals which are discussed below.

• Pin1 (Anode): This terminal allows the flow of current always
• Pin2 (Cathode): The flow of current that exists from this terminal always

Features & Specifications

The features and specifications of 1N5819 Schottky Diode include the following.

• It is a Schottky rectifier diode
• The typical forward current is 1A
• Forward surge current is 25A
• Forward voltage drop at 1A is 600mV
• Peak reverse voltage is 40V
• RMS reverse voltage is 28V
• The available package is DO-41
• Very less vF
• The stored charge is less
• Power loss is less
• The approximate weight is 0.4 gram
• All outside surfaces are resistant to corrosion
• Polarity is indicated with a band
• These diodes are Pb-Free
• For soldering the leads, the maximum temperature for 10secs is 260°C
• High efficiency
• Surge capacity is high
• The material used for the case is molded plastic

Alternative 1N5819 schottky diodes are; 1N4733A, 1N4148, 1N5408, 1N5822 and Alternative 1N5819 schottky diodes are 1N5824, 1N5822 & BAT54A.

1N5819 Schottky Diode Working

As compared to a normal PN junction diode, this diode working is somewhat different because P-Type based semiconductor is changed by metal.

Once metal & semiconductor materials are connected, then they form a metal-semiconductor junction which permits the electrons to flow from one level to another like high to low. In N-type semiconductors, the available electrons exhibit more energy & start flowing from the semiconductor region to the metal.

We know that once an atom drops an electron then it is known as a positive ion whereas it gets electrons, it is a negative ion. The positive & negative charge carriers which are available in metal & semiconductor regions can form the depletion region.

The charge carrier’s width in the n-type semiconductor is higher than the electrons moving from semiconductor material to the metal. To flow electrons from the semiconductor region to the metal, the electron’s positional energy should be superior as compared to a fixed voltage.

How to use 1N5819 Schottky Diode/Circuit Diagram

The circuit diagram of 12Volts to 24Volts DC to DC converter is shown below. The required components to build this circuit mainly includes a breadboard, connecting wires, NE555 timer IC, 12V DC input supply, Zener diode (24V/1W), 100uH Inductor (2A/3A), 1N5819 Schottky Diode, BD139 NPN Transistor, capacitors like 10nF, 1uF/50V & 560pF, resistors like 1K & 10K, battery clips.

In today’s electronics, a 12Volts to 24Volts DC to DC converter is an essential device. These are used for load matching of variable drives and also to test or troubleshoot electronics. So, in this project, we are going to build a simple 12V to 24V DC-DC converter circuit using NE555 IC & a 24V/1W based Zener Diode IC.

In this circuit, NE555 timer IC is an essential component that performs like an astable multivibrator. An astable multivibrator continuously switches in between two unbalanced states.

The transistors in this circuit switch continuously from cut-off state to saturation without external signal at a frequency determined by the RC time constant in the circuit. If these time constants are equivalent then a square wave signal will produce with 1/1.4 R x C frequency. Thus, an astable multivibrator is also a square wave or a pulse generator.

This dc to dc converter circuit turns around the NE555 IC function within Astable Mode. So this IC generates some frequency signals through resistors and capacitors in the circuit. In the circuit, both the pins of NE555 IC like pin2 & 6 are connected to make self trigger constantly to provide signals at the o/p pin 3 of IC

The output pin of this IC like pin3 is connected with the BD139 transistor. Once every signal is obtained then the transistor will be turned ON & generate some amount of energy within the inductor.

Once the BD139 transistor is turned OFF, then the energy saved in the inductor is fed to the 50V 1uF capacitor using 1N5819 Schottky diode. So finally, the o/p current of this circuit ranges from 100mA – 150mA. This circuit is used in applications like trainer board supply, test bench supply, and many more.

Where to use 1N5819 Schottky Diode?

The applications of 1N5819 Schottky diode include the following.

• It avoids the issues that occurred by reverse polarity.
• This diode is used in the inverter because that uses a large frequency value.
• It is used as a protection device in several devices.
• RF applications
• This diode is used where polarity protection is necessary
• Used as a general-purpose rectifier
• It detects signals & power supplies
• Logic Circuits
• Freewheeling diodes

Please refer to this link to know more about 1N5819 Schottky Diode Datasheet

Thus, Schottky diodes have faster-switching speeds as compared to normal diodes, so they are applicable in switching circuits with high frequency. The reverse blocking voltage of this diode is simply 28V. So for all Schottky diodes, it is one of the main drawbacks. Here is a question for you, what are the advantages of a Schottky diode?