DLW21HN670HQ2L - Murata Electronics

DLW21HN670HQ2L Frequently Asked Questions (FAQs)

• What is the recommended PCB land pattern for the DLW21HN670HQ2L?
  Murata provides a recommended PCB land pattern in their documentation, which can be found in the 'Recommended PCB Pattern' section of the datasheet. It's essential to follow this pattern to ensure proper mounting and to minimize parasitic inductance.
• How do I handle the DLW21HN670HQ2L's thermal considerations?
  The DLW21HN670HQ2L has a maximum operating temperature of 125°C. To ensure reliable operation, it's crucial to consider thermal management during the design process. This includes providing adequate airflow, using thermal vias, and selecting a suitable PCB material with high thermal conductivity.
• What is the self-resonant frequency (SRF) of the DLW21HN670HQ2L?
  The SRF of the DLW21HN670HQ2L is not explicitly stated in the datasheet. However, according to Murata's application notes, the SRF can be estimated using the following formula: SRF ≈ 1 / (2 * π * √(L * C)), where L is the inductance and C is the parasitic capacitance. For the DLW21HN670HQ2L, the estimated SRF is around 150-200 MHz.
• Can I use the DLW21HN670HQ2L in a high-frequency application?
  While the DLW21HN670HQ2L is suitable for high-frequency applications, its performance may degrade above 100 MHz due to the skin effect and proximity effect. For frequencies above 100 MHz, it's recommended to consider Murata's high-frequency inductor series, such as the DLW32R or DLW43R, which are specifically designed for high-frequency applications.
• How do I ensure the DLW21HN670HQ2L meets my specific impedance requirements?
  To ensure the DLW21HN670HQ2L meets your specific impedance requirements, you can use Murata's impedance calculator tool or consult with their application engineers. They can help you select the optimal inductor value and provide guidance on impedance matching and tuning.