MOSFET-transistor. Application of MOSFETs in electronics

MOSFET transistors are often used in the manufacture of microchips. These elements are designed to control the voltage of the circuit. The devices operate on the principle of polarity reversal. To date, many modifications have been released, which differ in the parameter of output resistance, sensitivity and conductivity. By design, they are similar.

Models with low conductivity consist of two cells. The conductors are installed in the lower part of the housing. Inside the element there are channels with diodes. The field of application of transistors is very extensive. Most often they occur in power supplies.

IRG4BC10K Series Transistors

This designation of transistors indicates that they are suitable for switches. They are installed on microcircuits with high current conductivity. Modes of operation of the transistor can be adjusted by changing the frequency in the circuit. In this case, the sensitivity limit is 5 mV. The output voltage of the submarine can withstand 12 V. If we consider modifications with connectors, then the transistors are connected via a modulator. Condensers for improving conductivity are used only in impulse type.

To solve problems with negative polarity, varicaps are needed. It is also important to note that these transistors are suitable for video encoders. In this case, the elements are able to work only with field capacitors. In this case, the current conductivity will not exceed 10 microns. In power supplies, the use of transistors is limited to models up to 15 V.

Parameters of the IRG4BC8K series transistor

The presented MOSFET series N-channel transistor is in high demand. First of all, it is important to note that it belongs to the class of high-frequency elements. The sensitivity parameter of the models is 6 mV. The conductivity of the current averages 12 microns. For the switches, the models are not suitable. They also quickly overheat in the sides of the food.

Work devices can only with absorbing filters. Most often, modifications are found in controllers and regulators. The chips for them are selected by the PP20 series. If we consider a standard controller with the specified transistor, the capacitors are of a through type. Filters in this case are taken with an overlay. If we consider the regulator circuit, then the transistor is installed behind the open capacitors. The conductivity should not exceed 15 microns. The maximum permissible current overload is 3 A.

Application of models IRG4BC17K

This designation of transistors indicates that they are used for switches and receivers. In this case, the conductivity of the current fluctuates around 5.5 μ. The sensitivity of the modification depends on the type of capacitors selected. If we consider the circuit of a standard receiver, then they are used in the field type. In this case, the sensitivity of the element fluctuates around 16 mV. It is also important to note that the filters are allowed to use only the absorbing type.

The permissible level of overload in this situation will not exceed 3.5 A. The output voltage of these transistors in the receivers can withstand 14 V. If we consider the circuit with a commutator, then the capacitors are of the impulse type. In total, the device requires two filters. Directly the transistor is installed behind the winding. The current conductivity index should not exceed 8 microns.

If we consider a modification with operational capacitors, then the above parameter does not exceed 10 microns. How to test a MOSFET transistor? You can do this with a conventional tester. The specified device will immediately show a violation of the integrity of the conductors.

Features of the IRG4BC15K

Powerful transistors of the presented series are suitable for PP20 microcircuits. They are used in various regulators to control the engines. Modes of operation of the transistor can be easily adjusted by changing the frequency in the circuit. If we consider the circuit of the conventional model, the output voltage on the conductors is 15 V. On average, the current conductivity is 4.5 μ.

The sensitivity of the element depends on the capacitors, as well as the adapter. It is also important to take into account the output resistance in the circuit. If we consider a modification with a grid adapter, then the sensitivity of the element is no more than 20 mV. Use triodes in the circuit is prohibited. In order to increase the conductivity of the transistor, rectifiers are used.

If we consider the regulator on a broadband adapter, the sensitivity index is no more than 15 mV. It is also important to note that the output voltage fluctuates around 10 V. In this case, the threshold resistance is about 20 ohms. In power units, the use of transistors is limited to devices up to 15 V.

The field of application of the transistor IRG4BC3K

The transistors of the presented series are suitable for commutators of various capacities. Also devices are actively used in receivers. The throughput of modifications varies in the region of 7 microns. In this case, the sensitivity depends on the capacitors. If we consider a standard commutator, then they use a unijunction type in it. In this case, the sensitivity index will not exceed 3 mV. If we consider devices with two-junction capacitors, then the above-mentioned parameter can reach 6 mV.

It is also important to note that the transistor can only work with transient adapters. In some cases, insulators are installed to increase the voltage stability. Filters are most often used as a conductor type. If we consider the receiver circuit with these transistors, then the output voltage should not exceed 12 V. In this case, it is more expedient to select the operating type of capacitors. On average, the sensitivity will be 12 mV.

Installing the transistor in the electric drive

MOSFET-transistor in electric drives of small power can be installed through adapters. In this case, capacitors are used with filters. The converter for normal operation of the system is selected without a rectifier. In some cases, a dinistor is installed.

If we consider the drive at 10 kW, then the transistor should be located with the kenotron. The output voltage will reach a maximum of 15 V. However, the resistance in the circuit should also be taken into account. On average, this parameter does not exceed 50 ohms.

Transistor in a 5 V power supply

In power supplies for 5 V, the MOSFET transistor may be installed without filters. Directly adapters are selected by the control type. Some modifications use a damper. In this case, the conductivity parameter does not exceed 5.5 μ. Sensitivity, in turn, depends on the type of capacitors. In blocks of 5 V they are often used integral type. There are also modifications with impulse elements. How to replace a transistor in a 5 V power supply? If necessary, this can always be done by installing an expander.

Transistors for 10 V units

In the 10 V power supply, the MOSFET is installed with absorbing filters. Condensers are most often used in pulsed type. The output resistance parameter in the circuit must not exceed 50 ohms. It is also important to note that open adapters are prohibited. In this case, they can be replaced by a comparator. The negative resistance will not exceed 40 ohms.

Devices in a 15 V unit

In a 15 V power supply, a MOSFET transistor is allowed to be installed at high throughput. If we consider modifications without amplifiers, then they are selected with an adapter. Condensers for the circuit many experts recommend taking a duplex type. In this case, the sensitivity of the element is 35 mV. In turn, the overload indicator will not exceed 2.5 A.

In order to increase the current conductivity, pulse capacitors are used. However, it is important to note that they consume a lot of electricity. Also, pulse type capacitors exert an additional load on the converter. To solve the presented problem, a triode is installed next to the transistor. It is more expedient to use a triode of the grid type. Also on the market are modifications with an inverter.

Transistors in dimmers

In light controllers, transistors with low sensitivity are often used. All this is necessary in order to solve problems with sharp temperature changes. In this case, the negative resistance should not exceed 50 ohms. Capacitors for systems are selected binary type. Many experts do not recommend using duplex adapters.