Bourns provides a recommended PCB layout and land pattern in their application notes and design guides. It's essential to follow these guidelines to ensure optimal performance, low thermal resistance, and minimal electromagnetic interference (EMI).
To minimize electromagnetic interference (EMI), keep the inductor at least 5 mm away from sensitive components, such as oscillators, antennas, or other inductors. You can also use shielding techniques, like copper tape or mu-metal, to contain the magnetic field.
Bourns recommends derating the voltage by 10-20% to ensure reliable operation. For the PWR163S-25-47R0F, the maximum allowable voltage is 25V. Derating to 20-22V will provide a safe operating margin.
The SRF is typically above the operating frequency range. However, if your design operates near the SRF, consider adding a damping resistor or a parallel capacitor to minimize resonance effects.
The thermal resistance of the PWR163S-25-47R0F is specified in the datasheet. To minimize thermal effects, ensure good airflow, use a heat sink if necessary, and avoid high ambient temperatures.
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PWR163S-25-47R0F Overview
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