MURS120TR

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Diodes - Rectifiers - Single

The MURS120TR is a device used for rectification and power control in various electronic applications. As a rectifier, it is able to regulate the alternating current (AC) power input into direct current (DC) power output. This allows for better control over the device, as well as more efficient use of energy. It is used in many consumer electronics, industrial equipment, and automotive applications.

Types of Rectifiers

Rectifiers can be divided into two major categories: full-wave rectifiers and half-wave rectifiers. Full-wave rectifiers are used when the desired output is to be constant. This is the most common type of rectifier, where the current passes through two diodes in a bridge configuration, and the output is connected to the bridge\'s lower nodes. Half-wave rectifiers are used when the output is to be varying, as they are capable of producing a pulsating DC current, which can be modified further by applications such as voltage regulators.

Structure and Internal Components

The MURS120TR is a switching-mode type of rectifier, meaning the rectification is done by a circuit instead of an actual diode. It’s a 3-pin, integrated circuit that consist of various electronic components. It contains a power MOSFET (Metal Oxide Semiconductor Field Effect Transistor), a Schottky diode, a feedback resistor, and a current-source circuitry. The MOSFET acts as a switch that rapidly turns on and off, allowing the circuitry to modulate waveform shapes and amplitude.

Operation

The MURS120TR is designed to connect the AC power to the DC power on a small time-scale. The MOSFET is connected between the AC and DC power lines, and will turn on when the AC waveform is most positive. When this happens, the current will be conducted to the DC power line and the diode will be reversed-biased, preventing any current from flowing back to the AC power source. When the AC waveform is negative, the MOSFET will be off and the output will remain the same. This process is repeated for each cycle, producing a steady DC output.

Applications

The most common application of the MURS120TR is in power supplies, providing constant DC power output. It is also used in motor controls and industrial-grade appliance circuits. The MURS120TR is especially advantageous in automotive applications, as it can help reduce the power dissipation of engines while improving the overall efficiency. Additionally, its low noise output makes it suitable for high frequency switching.

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