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 voltage, it's essential to consider the voltage stress during transient events, such as inrush current or voltage spikes. Bourns recommends derating the voltage by 20% to ensure reliable operation.
The SRF is typically not specified in the datasheet. To determine the SRF, you can use a network analyzer or a spectrum analyzer to measure the inductor's impedance vs. frequency. The SRF can affect the inductor's performance, especially in high-frequency applications.
The inductor's thermal resistance (Rth) is specified in the datasheet. To ensure reliable operation, ensure good airflow, use a heat sink if necessary, and avoid exceeding the maximum operating temperature (Tmax).
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