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Provides selection criteria for BVDSS and ID(max), detailed loss analysis such as switching losses, body-diode reverse recovery, conduction losses, switching-loss calculations, and gate-drive network considerations.",{"@graph":14,"@context":71},[15,34,54],{"@type":16,"itemListElement":17},"BreadcrumbList",[18,23,27,31],{"item":19,"name":20,"@type":21,"position":22},"https://docshare.wps.com","Home","ListItem",1,{"item":24,"name":25,"@type":21,"position":26},"https://docshare.wps.com/document/","Document",2,{"item":28,"name":29,"@type":21,"position":30},"https://docshare.wps.com/document/technology/","Technology",3,{"item":32,"name":10,"@type":21,"position":33},"https://docshare.wps.com/document/mosfet-selection-for-low-voltage-ups-design-guidelines/664743/",4,{"url":32,"name":10,"@type":35,"image":36,"author":41,"headline":10,"publisher":44,"fileFormat":47,"inLanguage":8,"description":12,"dateModified":48,"datePublished":48,"encodingFormat":47,"isAccessibleForFree":49,"interactionStatistic":50},"DigitalDocument",{"url":37,"@type":38,"width":39,"height":40},"https://docshare.wps.com/thumbnails/mosfet-selection-for-low-voltage-ups-design-guidelines/664743.png","ImageObject",300,407,{"name":42,"@type":43},"Miles","Person",{"url":19,"name":45,"@type":46},"DocShare","Organization","application/pdf","2026-10-29",true,{"@type":51,"interactionType":52,"userInteractionCount":22},"InteractionCounter",{"@type":53},"ViewAction",{"@type":55,"mainEntity":56},"FAQPage",[57,63,67],{"name":58,"@type":59,"acceptedAnswer":60},"What is the document scope for MOSFET selection in a low-voltage UPS?","Question",{"text":61,"@type":62},"It guides MOSFET selection for the inverter stage of a UPS operating from 12 V or 24 V batteries, including functional description and selection guidance for inverter designs.","Answer",{"name":64,"@type":59,"acceptedAnswer":65},"Which UPS inverter topologies and output types are covered?",{"text":66,"@type":62},"Push-pull and full-bridge topologies are described for both square-wave and sine-wave output designs.",{"name":68,"@type":59,"acceptedAnswer":69},"What key factors are evaluated when selecting MOSFETs?",{"text":70,"@type":62},"Selection criteria include BVDSS and ID(max), switching losses specific to each topology, body-diode reverse recovery loss, conduction losses, and methods for switching-loss calculation.","https://schema.org",{"og:url":32,"og:type":73,"og:title":10,"og:site_name":45,"og:description":12},"article",{"robots":75,"canonical":32},"index,follow",{"doc_id":77,"site_id":7},664743,1793270673,{"code":4,"msg":80,"data":81},"success",[82,86,90,94,99,103,108,113,118,121,125],{"id":22,"doc_module":4,"doc_module_name":25,"category_name":83,"show_sort_weight":84,"slug":85},"Story & Novel",90,"story-novel",{"id":26,"doc_module":4,"doc_module_name":25,"category_name":87,"show_sort_weight":88,"slug":89},"Literature",80,"literature",{"id":33,"doc_module":4,"doc_module_name":25,"category_name":91,"show_sort_weight":92,"slug":93},"Exam",70,"exam",{"id":95,"doc_module":4,"doc_module_name":25,"category_name":96,"show_sort_weight":97,"slug":98},5,"Comic",60,"comic",{"id":100,"doc_module":4,"doc_module_name":25,"category_name":29,"show_sort_weight":101,"slug":102},6,50,"technology",{"id":104,"doc_module":4,"doc_module_name":25,"category_name":105,"show_sort_weight":106,"slug":107},7,"Healthcare",40,"healthcare",{"id":109,"doc_module":4,"doc_module_name":25,"category_name":110,"show_sort_weight":111,"slug":112},8,"Research & Report",30,"research-report",{"id":114,"doc_module":4,"doc_module_name":25,"category_name":115,"show_sort_weight":116,"slug":117},9,"Religion & Spirituality",20,"religion-spirituality",{"id":116,"doc_module":4,"doc_module_name":25,"category_name":119,"show_sort_weight":116,"slug":120},"World Cup","world-cup",{"id":122,"doc_module":4,"doc_module_name":25,"category_name":123,"show_sort_weight":122,"slug":124},10,"Lifestyle","lifestyle",{"id":126,"doc_module":4,"doc_module_name":25,"category_name":127,"show_sort_weight":95,"slug":128},19,"General","general",{"code":4,"msg":80,"data":130},{"doc_id":77,"user_id":131,"nickname":42,"user_avatar":132,"doc_module":4,"category_id":100,"category_name":29,"doc_title":10,"doc_description":12,"doc_content":133,"file_id":134,"file_url":135,"file_type":136,"file_size":137,"view_count":22,"is_deleted":4,"is_public":22,"is_downloadable":22,"audit_status":22,"page_count":138,"language":139,"language_code":8,"site_id":7,"html_lang":8,"table_of_contents":140,"faqs":141,"seo_title":142,"seo_description":12,"update_tm":78,"read_time":143},13056703019404,"https://ap-avatar.wpscdn.com/davatar_29158cc5080c5b710cf443261637dec0","MOSFET selection for low voltage UPS Design guidelines  \nAuthor: Peter B . Green  \nAbout this document  \nScope and purpose  \nThe purpose of this document is to provide a comprehensive functional description and guide to selecting the correct MOSFET for use in the inverter stage of a UPS operating from a 12 V or 24 V battery. Push-pull and fullbridge topologies are described in square-wave and sine-wave output designs. Paralleling of MOSFETs is also discussed, including thermal considerations, PCB layout optimization and techniques for obtaining best current sharing during steady-state and switching operation.  \nIntended audience  \nDesign engineers, applications engineers and students.  \nTable of contents  \nAbout this document....................................................................................................................... 1  \nTable of contents............................................................................................................................ 1  \n1 Introduction .......................................................................................................................... 3  \n1.1 Uninterruptible power supply types ......................................................................................................3  \n2 UPS inverter topologies .......................................................................................................... 5  \n2.1 Low frequency transformer based UPS.................................................................................................. 6  \n2.1.1 Push-pull topology............................................................................................................................. 6  \n2.1.2 Full-bridge topology .......................................................................................................................... 9  \n2.2 High frequency transformer-based UPS .............................................................................................. 12  \n3 MOSFET selection criteria ...................................................................................................... 13  \n3.1 Selecting BVDSS ....................................................................................................................................... 13  \n3.2 Selecting ID(max) ....................................................................................................................................... 14  \n3.3 Switching losses in UPS ........................................................................................................................ 15  \n3.3.1 Push-pull (non-ZVS) converter switching losses............................................................................. 15  \n3.3.2 Full-bridge converter switching losses............................................................................................ 16  \n3.4 Body diode reverse recovery loss ......................................................................................................... 19  \n3.5 Conduction losses ................................................................................................................................. 20  \n3.6 Switching loss calculation .................................................................................................................... 20  \n3.7 How many parallel MOSFETs should be used? .................................................................................... 22  \n3.7.1 Gate threshold, VGS(th)........................................................................................................................ 22  \n3.7.2 Avalanche voltage, BVDSS or V(BR)DSS................................................................................................... 22  \n3.7.3 Parasitic inductances ....................................................................................................................... 23  \n3.7.4 Body diode forward voltage drop...","cbCair1kPcTT4tEi","https://ap.wps.com/l/cbCair1kPcTT4tEi","pdf",1341497,33,"English","# About this document\n# 1 Introduction\n## 1.1 Uninterruptible power supply types\n# 2 UPS inverter topologies\n## 2.1 Low frequency transformer based UPS\n## 2.2 High frequency transformer-based UPS\n# 3 MOSFET selection criteria\n## 3.1 Selecting BVDSS\n## 3.2 Selecting ID(max)\n## 3.3 Switching losses in UPS\n## 3.4 Body diode reverse recovery loss\n## 3.5 Conduction losses\n## 3.6 Switching loss calculation\n## 3.7 How many parallel MOSFETs should be used?\n## 3.8 Gate-drive network\n# 4 Thermal design, MOSFET packages and heatsinks\n## 4.1 MOSFET temperature de-rating\n## 4.2 Thermal modeling\n# 5 Conclusion\n# References\n# Revision history","[{\"question\":\"What is the document scope for MOSFET selection in a low-voltage UPS?\",\"answer\":\"It guides MOSFET selection for the inverter stage of a UPS operating from 12 V or 24 V batteries, including functional description and selection guidance for inverter designs.\"},{\"question\":\"Which UPS inverter topologies and output types are covered?\",\"answer\":\"Push-pull and full-bridge topologies are described for both square-wave and sine-wave output designs.\"},{\"question\":\"What key factors are evaluated when selecting MOSFETs?\",\"answer\":\"Selection criteria include BVDSS and ID(max), switching losses specific to each topology, body-diode reverse recovery loss, conduction losses, and methods for switching-loss calculation.\"}]","MOSFET selection for low voltage UPS - Design guidelines | PDF",83]