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, thermal management, and reliability.
To minimize magnetic field interference, keep the inductor at least 5 mm away from sensitive components, such as oscillators, antennas, and magnetically sensitive devices. You can also use shielding techniques, like mu-metal shielding or copper tape, to contain the magnetic field.
While the datasheet specifies a maximum rated current, it's essential to consider the maximum allowed voltage across the inductor to prevent saturation and ensure reliable operation. Typically, this value is around 1.5 to 2 times the maximum rated voltage, but it's best to consult with Bourns' application engineers for specific guidance.
The self-resonant frequency (SRF) of the inductor can affect its performance and potentially cause resonant peaks in the circuit. To mitigate this, use a series resistor or a damping network to reduce the Q factor, and ensure the operating frequency is below the SRF. You can also use simulation tools to model the inductor's behavior and optimize the design.
The PWR263S-35-47R0FE has a maximum operating temperature of 125°C. To ensure reliable operation, provide adequate thermal management, such as a heat sink or thermal pad, to keep the inductor's temperature below the maximum rating. You should also consider the PCB's thermal conductivity, airflow, and nearby heat sources.
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