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. You can also use shielding techniques, such as copper pours or EMI shields, to contain the magnetic field.
Bourns recommends derating the voltage by 10-15% to ensure reliable operation. For the PWR163S-25-12R0F, the maximum allowable voltage is approximately 10.2V (85% of 12V).
The SRF can be calculated using the inductor's inductance, capacitance, and resistance values. For the PWR163S-25-12R0F, the SRF is approximately 25 MHz. Above the SRF, the inductor behaves like a capacitor, which can affect circuit performance. Ensure your circuit design takes into account the SRF to avoid unwanted resonances.
The thermal resistance of the PWR163S-25-12R0F is approximately 30°C/W. This means that for every watt of power dissipated, the inductor's temperature will rise by 30°C. Ensure your design takes into account the thermal resistance to prevent overheating and ensure reliable operation.
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PWR163S-25-12R0F Overview
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