Bourns provides a recommended PCB layout and land pattern in their application notes. It's essential to follow these guidelines to ensure proper thermal management, minimize parasitic inductance, and optimize performance.
To minimize the impact of SRF, ensure the inductor is used below its SRF, and consider adding a decoupling capacitor to filter out high-frequency noise. Additionally, use a shielded inductor or add a shield to the PCB to reduce electromagnetic interference (EMI).
The maximum allowable current is dependent on the inductor's temperature rating. For the 1140-122K-RC, the maximum current rating is 1.22A at 40°C. Exceeding this current may lead to overheating, reducing the inductor's lifespan. Always check the temperature derating curve in the datasheet to ensure safe operation.
The 1140-122K-RC is rated for operation up to 125°C. When using the inductor in high-temperature environments, ensure proper thermal management, reduce the current rating accordingly, and consider using a thermally conductive interface material to improve heat dissipation.
To select the correct inductor value, consider the application's requirements, such as the desired inductance, current rating, and frequency of operation. Use online inductor selection tools or consult with a Bourns application engineer to determine the optimal inductor value for your specific application.
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1140-122K-RC Overview
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