The FQU2N90S is a SuperFET® MOSFET from Fairchild Semiconductor, leveraging their advanced technology to provide high performance and efficiency. It's an N-Channel MOSFET designed for high-voltage, high-speed switching applications.

Applications:

• Switch Mode Power Supplies (SMPS)
• Power Factor Correction (PFC)
• LCD/LED Lighting
• Adapters and Chargers
• Renewable Energy Systems

Features:

• Drain-Source Voltage (VDSS): 900V
• Continuous Drain Current (ID): 2A
• RDS(on) = 4.5 Ω (typical) @ VGS = 10V
• Low Gate Charge (Qg = 6.6 nC typical)
• Low Effective Output Capacitance (Coss)
• Avalanche Ruggedness

Benefits:

• High efficiency due to low on-resistance, reducing power loss and heat generation.
• Fast switching speeds because of the low gate charge and output capacitance.
• Enhanced reliability with its robust avalanche capability, ensuring it can handle transient voltage spikes.
• Reduced system size and cost through efficient power conversion.
• Improved thermal performance due to lower operating temperatures.

Additional Details:

The FQU2N90S is available in a TO-251 (IPAK) package, making it suitable for surface mounting. It’s designed for high-voltage applications, and the gate-source voltage (VGS) is rated at ±30V. The device is RoHS compliant. Optimal gate drive circuitry is crucial to achieve the best switching performance and minimize ringing. Proper PCB layout is important to minimize parasitic inductance and capacitance.