2SK3483-Z-E2-AZ vs IRFPC42
| Part Number |
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| Category | Transistors - FETs, MOSFETs - Arrays | Transistors - FETs, MOSFETs - Arrays |
| Manufacturer | Renesas Electronics America Inc | Harris Corporation |
| Description | N-CHANNEL POWER MOSFET SWITCHING | 3.9A, 1000V, 4.2 OHM, N-CHANNEL |
| Package | Bulk | Bulk |
| Series | - | - |
| Operating Temperature | - | - |
| Mounting Type | - | - |
| Package / Case | - | - |
| Supplier Device Package | - | - |
| Power - Max | - | - |
| FET Type | - | - |
| FET Feature | - | - |
| Drain to Source Voltage (Vdss) | - | - |
| Current - Continuous Drain (Id) @ 25°C | - | - |
| Rds On (Max) @ Id, Vgs | - | - |
| Vgs(th) (Max) @ Id | - | - |
| Gate Charge (Qg) (Max) @ Vgs | - | - |
| Input Capacitance (Ciss) (Max) @ Vds | - | - |
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1. What is MOSFET and how does it work?
MOSFET (Metal-Oxide-Semiconductor Field-Effect Transistor), that is, metal-oxide-semiconductor field effect transistor, is a transistor that uses electric field effect to control conduction and shutdown. MOSFET controls the flow of current between the source and drain by applying voltage to the gate. Its working principle is as follows:
Working principle:
When a positive voltage is applied to the gate, the electric field causes the impurities in the substrate to form an "open" n-type or p-type conductive area, i.e., a channel, between the gate and the substrate. A capacitor is formed between the oxide layer above the channel and the gate, called the gate capacitance. When the channel conductive area extends to the source and drain, the MOSFET is in the on state. In the on state, the voltage difference between the source and the drain drives the current to flow through the conductive area.
When a negative voltage is applied to the gate, the channel on the substrate shrinks, the conductivity weakens, and the current between the source and the drain decreases. When the gate voltage continues to decrease, the channel eventually disappears, the MOSFET is in the off state, there is no conductive path between the source and the drain, and the MOSFET is in a high-resistance state.
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2. What are the two types of MOSFET transistors?
There are two main types of MOSFET transistors: enhancement MOSFET and depletion MOSFET.
Enhancement MOSFET
When the gate voltage of the enhancement MOSFET is zero, there is no conductive channel between the source and the drain. Only when the gate voltage reaches a certain threshold voltage, the conductive channel will be formed and the current will begin to flow. This type of MOSFET requires a positive voltage to be applied to the gate to turn on, and is in a high-resistance state when no voltage is applied.
Depletion-type MOSFET
When the gate voltage of a depletion-type MOSFET is zero, a conductive channel already exists between the source and drain. Applying a negative gate voltage can reduce or deplete the conductive channel, thereby controlling the current. This type of MOSFET is already turned on when no voltage is applied, and needs to be turned off by applying a negative voltage.
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3. What devices use MOSFET?
MOSFET (metal oxide semiconductor field effect transistor) is widely used in many fields and devices, mainly including the following aspects:
Power management:
Switching regulator: MOSFET is often used as a key component of switching regulators (such as PWM control), and achieves high-efficiency voltage conversion and current regulation by controlling its switching state. In circuits such as battery management and charging control, MOSFET ensures the safety and service life of the battery.
LED driver: In the field of LED lighting, MOSFET is used to drive LED lights to achieve energy-saving and efficient lighting control.
DC-DC converter: In the power conversion system, MOSFET is an important component of the DC-DC converter, which can convert one DC voltage to another DC voltage.
Motor control:
Motor drive: MOSFET is used to drive the motor in the motor control system to realize the start and stop and speed regulation of the motor. In the fields of automobiles, industry, household appliances, etc., MOSFET is the core component of motor control.
Braking system: In the braking system of the car, MOSFET controls the current to achieve precise control of the braking function.
Communication equipment:
Power amplifier: In mobile communication base stations, MOSFET is used as a power amplifier to amplify and process signals to improve communication quality.
RF switch: The fast switching speed and high frequency response capability of MOSFET make it suitable for RF switch to achieve fast switching and routing of signals.
Modulator, mixer: In wireless communication systems, MOSFET is used in key components such as modulators and mixers to achieve signal modulation and frequency conversion.
Consumer electronics:
Digital electronic products: MOSFET is widely used in digital electronic products such as mobile phones, tablets, and laptops for power management, signal processing and other circuits.
Display equipment: In display devices such as LCD TVs and monitors, MOSFET is used to drive backlights, control display panels, etc.
Medical equipment:
Power management: In medical equipment, MOSFET is used for power management to ensure stable operation and efficient energy consumption of equipment.
Signal amplification: The high input resistance and low noise characteristics of MOSFET make it used in medical monitors and other equipment to amplify physiological signals (such as electrocardiogram, electroencephalogram, etc.)
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4. Why do we use MOSFET instead of FET?
The main reason why we use MOSFET instead of FET is the characteristics and advantages of MOSFET.
MOSFET (Metal-Oxide Semiconductor Field Effect Transistor) is a voltage-controlled device with the following main features and advantages:
Fast switching speed: MOSFET has a very fast switching speed, which makes it perform well in high-frequency applications. Its fast switching characteristics make MOSFET widely used in switching power supplies, motor control, inverters and other fields.
High input impedance: The input impedance of MOSFET is very high, which means that it is less sensitive to external interference during operation and can provide more stable performance.
Low noise: Since MOSFET is a voltage-controlled device, it generates less noise during operation, which is suitable for noise-sensitive application scenarios.
Low drive power: MOSFET has a small drive power, which means that the design of the drive circuit can be simpler and more efficient.
