BALFLB-WL-07D3

Balun Overview

The BALFLB-WL-07D3 is an ultra-miniature balun from STMicroelectronics, integrating a matching network, balun, and harmonics filter. Designed for the STM32WL sub-GHz wireless microcontroller, it features customized impedance matching for BGA packages on 4-layer PCBs. The device operates within a frequency range of 470MHz to 510MHz, with a nominal input/output impedance of 50Ω. Key electrical parameters include a maximum insertion loss of 2.05dB, minimum return loss of 16dB, and 0° phase difference. It utilizes IPD technology on a non-conductive glass substrate for optimized RF performance.

Balun Feature Summary

• Integrates matching network, balun, and deep Tx suppression harmonics filter in a single component
• Customized impedance matching specifically optimized for BGA STM32WL sub-GHz wireless microcontrollers
• Utilizes IPD technology on a non-conductive glass substrate to ensure high RF performance
• Features a thin profile design suitable for reflow soldering with minimal height increase

Balun Applications

• Sub-GHz wireless communication modules using STM32WL microcontrollers
• IoT devices requiring compact RF front-end solutions
• Applications demanding low insertion loss and high harmonic suppression

Balun Procurement Notes

Verify that the specific part number matches the required STM32WL integration context. Ensure the procurement includes the correct packaging variant (TR, CT, or DKR) as specified by the design requirements. Confirm compliance with ECOPACK2 standards and RoHS3 regulations during sourcing. Cross-reference the manufacturer's standard lead time with project schedules to avoid delays.

Balun Selection Notes

Select this component when designing around the STM32WL series for optimal impedance matching without external components. Consider the 8-WFBGA package size and 4-layer PCB requirement for proper thermal and electrical performance. Evaluate the need for deep Tx harmonic suppression to meet regulatory emissions standards. Verify that the operating frequency aligns with the 470MHz to 510MHz range.

Balun Part Context

This balun belongs to the BALFxx-WL family, designed specifically for STMicroelectronics' sub-GHz wireless MCUs. It replaces discrete balun, filter, and matching network components, reducing bill of materials and board space. The WL suffix indicates optimization for the Wireless Low Power MCU ecosystem.

Balun Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Designers should consult official STMicroelectronics resources for potential alternatives within the BALFxx-WL series.