The CDRH4D28-4R7 is a shielded power inductor manufactured by Sumida America Components Inc. It's designed for use in compact power supply applications where space is limited, providing efficient energy storage and filtering. The shielded construction minimizes electromagnetic interference (EMI), making it suitable for noise-sensitive circuits.

Applications

• DC-DC Converters: Used in step-up (boost), step-down (buck), and inverting converters for power regulation.
• Power Supplies for Small Electronics: Employed in smartphones, wearables, and other compact devices for efficient power management.
• LED Lighting: Used in LED drivers to regulate current and improve efficiency in space-constrained applications.
• Noise Filtering: Filtering high-frequency noise in power lines and signal circuits where size is a concern.
• Voltage Regulators: Providing stable voltage regulation in electronic circuits.

Features

• Shielded Construction: Minimizes electromagnetic interference (EMI) and reduces noise.
• High Current Capacity: Designed to handle reasonable current levels for its size.
• Low DC Resistance (DCR): Reduces power losses and improves efficiency.
• Compact Size: Allows for efficient use of PCB space.
• Stable Inductance: Maintains a stable inductance value over temperature and current.

Benefits

• Reduced EMI: Shielded design minimizes noise, improving the performance of sensitive circuits.
• Efficient Power Conversion: Low DCR minimizes power losses, improving overall efficiency, especially in battery-powered applications.
• Space Saving: Compact size allows for high-density designs, making it ideal for portable electronics.
• Reliable Performance: Manufactured with high-quality materials to ensure long-term reliability.
• Simplified Design: Easier to integrate into existing circuits due to its small size and good performance.

Additional Details

The CDRH4D28-4R7 has an inductance value of 4.7µH (4R7). The '4D28' indicates the physical dimensions of the inductor (approximately 4mm x 4mm footprint and 2.8mm height). The saturation current and rated current are critical parameters and must be considered in relation to the application's maximum current draw. Refer to the datasheet for detailed electrical characteristics, mechanical dimensions, and performance graphs. Optimal PCB layout is crucial for minimizing losses and maximizing the inductor's performance, especially due to its small size.