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 electromagnetic interference (EMI), keep the inductor at least 5 mm away from sensitive components. You can also use shielding techniques, such as copper tape or mu-metal shielding, to contain the magnetic field.
While the datasheet specifies a maximum rated current, it's essential to consider the voltage across the inductor as well. As a general rule, keep the voltage across the inductor below 1.5 times the maximum rated voltage to prevent saturation and ensure reliable operation.
The self-resonant frequency (SRF) is typically not specified in the datasheet. To determine the SRF, use a network analyzer or impedance analyzer to measure the inductor's impedance vs. frequency. Then, design your circuit to avoid operating near the SRF to prevent unwanted resonances.
The 3319P-1-104 uses a ferrite core material. Ferrite cores offer a good balance between cost, size, and performance. However, they can exhibit core losses at high frequencies. Be mindful of the operating frequency and consider using alternative core materials, such as iron powder or sendust, if high-frequency performance is critical.
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