| Popis: |
The paper compares the performance of different output filter designs used in high-speed switching power converters in envelope tracking power supplies. A GaN-based driver capable of achieving high switching frequency and high efficiency realizes the switching power converter. The influence of LCR and LCLR filters on the envelope signal at the output of the power supply is analyzed. Experiments show that, compared to the LCR filter, the LCLR filter can reduce the output ripple current from the switching power converter, and corresponding the low-frequency noise generated by the charging and discharging of the inductor, maintaining a stable envelope voltage output. In addition, smaller passive components can be designed for the LCLR filters to achieve the required ripple voltage, reducing the overall size and improving the response time of the switching power converter. |
