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ZVS Modulation Strategy for Constant High Frequency Four-Switch Buck-Boost Converters used in Envelope Tracking Power Supplies

Autor(es) y otros:
García Meré, Juan RamónAutoridad Uniovi; Rodríguez Méndez, JuanAutoridad Uniovi; Sebastián Zúñiga, Francisco JavierAutoridad Uniovi
Palabra(s) clave:

Envelope Tracking (ET)

Zero Voltage Switching (ZVS)

Four-Switch Buck-Boost (FSBB

High-frequency converters

Fecha de publicación:
2024
Editorial:

IEEE

Resumen:

Envelope Tracking (ET) is a technique used to improve the power efficiency of Linear Power Amplifiers (LPAs). It consists in modulating the LPA supply voltage according to the envelope of the communication signal to be reproduced. In order to accurately reproduce the envelope, Switching-Mode Power Converters (SMPCs) with a switching frequency in the megahertz range are mandatory, leading to high switching losses and degrading the overall performance of the ET system. In this work, a control strategy to achieve Zero Voltage Switching (ZVS) in a Four-Switch Buck-Boost (FSBB) converter with constant frequency is proposed to minimize the switching losses of high-bandwidth SMPCs in ET applications. The operation of a FSBB performing fast output voltage changes and the methodology used to achieve ZVS for any voltage are described. The idea is validated with a 10 MHz GaN-based prototype providing an output voltage that ranges between 0 V and 20 V and handling a peak output power of 45 W.

Envelope Tracking (ET) is a technique used to improve the power efficiency of Linear Power Amplifiers (LPAs). It consists in modulating the LPA supply voltage according to the envelope of the communication signal to be reproduced. In order to accurately reproduce the envelope, Switching-Mode Power Converters (SMPCs) with a switching frequency in the megahertz range are mandatory, leading to high switching losses and degrading the overall performance of the ET system. In this work, a control strategy to achieve Zero Voltage Switching (ZVS) in a Four-Switch Buck-Boost (FSBB) converter with constant frequency is proposed to minimize the switching losses of high-bandwidth SMPCs in ET applications. The operation of a FSBB performing fast output voltage changes and the methodology used to achieve ZVS for any voltage are described. The idea is validated with a 10 MHz GaN-based prototype providing an output voltage that ranges between 0 V and 20 V and handling a peak output power of 45 W.

Descripción:

Applied Power Electronics Conference and Exposition (2024. Long Beach, USA)

URI:
https://hdl.handle.net/10651/71818
Patrocinado por:

This work was supported in part by Ministerio de Ciencia e Innovación, by Agencia Estatal de Investigación and by FEDER under Project PID2022-136969OB-I00, and in part by the Principality of Asturias under “Severo Ochoa” Program Grant no. BP20-181 and under Project SV-PA-21-AYUD/2021/51931.

Colecciones
  • Ingeniería Eléctrica, Electrónica, de Comunicaciones y de Sistemas [1086]
  • Investigaciones y Documentos OpenAIRE [8365]
  • Ponencias, Discursos y Conferencias [4228]
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