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 can affect the inductor's performance. To mitigate this, use a series resistor or a damping resistor to reduce the Q factor and prevent unwanted oscillations. You can also use a ferrite bead or a common-mode choke to filter out high-frequency noise.
Bourns provides a thermal derating curve in their datasheet. This curve shows the inductor's current-carrying capacity at elevated temperatures. Be sure to consider this curve when designing your application, especially in high-temperature environments, to ensure the inductor operates within its specified ratings.
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