The FDV0840-4R9M is a shielded power inductor manufactured by Toko America Inc. It is designed for use in DC-DC converters and power supply circuits where efficient energy storage and low electromagnetic interference (EMI) are critical. The inductor's shielded construction minimizes magnetic flux leakage, which reduces the potential for interference with nearby components.

Applications:

• DC-DC converters: Used in step-up (boost), step-down (buck), and inverting converters to store energy and provide a stable output voltage.
• Power supplies for portable devices: Employed in smartphones, tablets, and laptops to regulate voltage and filter noise.
• LED lighting: Integrated into LED driver circuits to provide a constant current source.
• Automotive electronics: Utilized in engine control units (ECUs) and other automotive power systems.
• Industrial equipment: Used in power supplies for industrial control systems and automation equipment.

Features:

• Shielded construction: Minimizes EMI and reduces the risk of interference with nearby components.
• High current handling capability: Can withstand high current levels without saturation.
• Low DC resistance: Minimizes power loss and improves efficiency.
• Compact size: The 0840 form factor allows for high-density mounting on PCBs.
• Excellent temperature stability: Maintains stable performance over a wide temperature range.

Benefits:

• Improved power efficiency: Reduces power loss in DC-DC converters and power supply circuits.
• Reduced EMI: Minimizes electromagnetic interference, resulting in cleaner and more reliable operation.
• Stable performance: Provides consistent performance over a wide range of operating conditions.
• Smaller PCB footprint: Allows for compact designs and increased board density.
• Enhanced product reliability: Protects sensitive electronic components from voltage fluctuations and noise.

Additional Details:

The FDV0840-4R9M has an inductance value of 4.9 μH. This inductor boasts a saturation current of approximately 2.5A, and a typical DC resistance of around 0.05 Ohms. It is designed to operate over a temperature range of -40°C to +125°C. The shielded construction incorporates a ferrite core and a shielded winding to minimize magnetic flux leakage. It is often used in conjunction with switching regulators to provide a stable and efficient power supply. The component is surface mountable, facilitating automated assembly and reducing manufacturing costs. This inductor is especially well-suited for applications that require high efficiency and low noise in a compact form factor.