{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,11,7]],"date-time":"2025-11-07T09:54:29Z","timestamp":1762509269485,"version":"build-2065373602"},"reference-count":39,"publisher":"MDPI AG","issue":"7","license":[{"start":{"date-parts":[[2025,4,2]],"date-time":"2025-04-02T00:00:00Z","timestamp":1743552000000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"EPIT24 Santander\u2013UHU: Mobility grants for international stays for PhD students at the University of Huelva","award":["UIDB\/50021\/2020","FPU22\/03537"],"award-info":[{"award-number":["UIDB\/50021\/2020","FPU22\/03537"]}]},{"name":"Spanish Ministry of Universities for training of university teaching staff","award":["UIDB\/50021\/2020","FPU22\/03537"],"award-info":[{"award-number":["UIDB\/50021\/2020","FPU22\/03537"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Electronics"],"abstract":"<jats:p>In order to obtain acceptable efficiencies, hard-switching techniques and the converters that implement them must operate at relatively low frequencies (tens of kilohertz), which translate into converters of large size, weight, and volume, and therefore higher cost. To improve these characteristics, this work introduces a new transformerless MHz-range DC\u2013DC converter that provides symmetrical bipolar outputs. The developed topology uses a single grounded switch, achieves soft switching (ZVS) over a wide load range, and does not require the use of floating or isolated controllers, reducing cost, size, and complexity. The output voltages are self-regulated to maintain the same value, ensuring balanced bipolar operation. A comprehensive analysis, design, sizing, simulation, implementation and testing are provided on a 150 W prototype operating at a switching frequency of 1 MHz, with step-up and step-down capability and implemented with GaN FET. The evaluated configuration shows an efficiency close to 90% and high power density, making it suitable for compact designs in a variety of applications requiring reliable power management and high efficiency such as lighting, electric vehicles, or auxiliary power supplies.<\/jats:p>","DOI":"10.3390\/electronics14071434","type":"journal-article","created":{"date-parts":[[2025,4,2]],"date-time":"2025-04-02T07:47:44Z","timestamp":1743580064000},"page":"1434","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":2,"title":["A Novel Transformerless Soft-Switching Symmetrical Bipolar Power Converter: Analysis, Design, Simulation and Validation"],"prefix":"10.3390","volume":"14","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-0831-9609","authenticated-orcid":false,"given":"Cristian","family":"D\u00edaz-Mart\u00edn","sequence":"first","affiliation":[{"name":"Department of Electronic Engineering, Computer Systems and Automation, University of Huelva, 21007 Huelva, Spain"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-9230-165X","authenticated-orcid":false,"given":"Eladio","family":"Dur\u00e1n Aranda","sequence":"additional","affiliation":[{"name":"Department of Electronic Engineering, Computer Systems and Automation, University of Huelva, 21007 Huelva, Spain"},{"name":"Science and Technology Research Center of Huelva (CCTH), University of Huelva, 21007 Huelva, Spain"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-2164-0739","authenticated-orcid":false,"given":"Fernando Alves","family":"da Silva","sequence":"additional","affiliation":[{"name":"Instituto Superior T\u00e9cnico, INESC\u2013ID, University of Lisbon, 1049-001 Lisbon, Portugal"}]},{"given":"S\u00e9rgio","family":"Andr\u00e9","sequence":"additional","affiliation":[{"name":"Instituto Superior T\u00e9cnico, INESC\u2013ID, University of Lisbon, 1049-001 Lisbon, Portugal"}]}],"member":"1968","published-online":{"date-parts":[[2025,4,2]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"39","DOI":"10.1109\/MPEL.2024.3356248","article-title":"Sustainability of Power Electronics and Batteries: A Circular Economy Approach","volume":"11","author":"Sangwongwanich","year":"2024","journal-title":"IEEE Power Electron. 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