The FQA28N20 is an N-Channel MOSFET (Metal-Oxide-Semiconductor Field-Effect Transistor) from ON Semiconductor (formerly Fairchild Semiconductor). It is designed for high-voltage, high-current switching applications. This MOSFET offers low on-resistance and fast switching speeds, making it suitable for various power electronics applications.

Applications:

• Switch-Mode Power Supplies (SMPS): Used as a switching element in SMPS designs, converting DC voltage levels efficiently.
• Power Inverters: Employed in power inverters to convert DC power to AC power, such as in solar inverters and UPS systems.
• Motor Control: Used in motor control circuits for controlling the speed and torque of electric motors.
• Lighting Ballasts: Provides efficient switching in electronic lighting ballasts for fluorescent and LED lighting.
• DC-DC Converters: Used in DC-DC converters for regulating voltage levels in various electronic devices.

Features:

• High Voltage Rating: Offers a high drain-source voltage (V_DSS) rating, allowing it to withstand high voltages in demanding applications.
• Low On-Resistance: Provides low on-resistance (R_DS(on)), minimizing power dissipation and improving efficiency.
• Fast Switching Speed: Enables rapid switching of the load current, reducing switching losses and improving overall performance.
• High Current Capability: Can handle high drain currents, making it suitable for high-power applications.
• Avalanche Rated: Designed to withstand avalanche breakdown, providing added protection against voltage transients.

Benefits:

• Improved Efficiency: Low on-resistance and fast switching speeds contribute to higher overall system efficiency.
• Enhanced Reliability: Avalanche rating and robust design ensure reliable operation in demanding environments.
• Simplified Design: Easy to integrate into various circuit designs, simplifying the development process.
• Reduced Power Dissipation: Low on-resistance minimizes power dissipation, reducing heat generation and improving thermal performance.
• Increased Power Density: High current capability and compact package enable high power density designs.

Technical Specifications: The FQA28N20 typically features a drain-source voltage (V_DSS) of 200V, a continuous drain current (I_D) of 28A, and an on-resistance (R_DS(on)) of a few tens of milliohms. Refer to the ON Semiconductor datasheet for detailed specifications, including gate threshold voltage, input capacitance, and thermal resistance. It is commonly available in a TO-220 package.