[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"detail-sidebar-cat-0-en-105":3,"doc-seo-674285-105":59,"doc-detail-674285-en":129},{"code":4,"msg":5,"data":6},0,"success",[7,13,18,23,28,33,38,43,48,51,55],{"id":8,"doc_module":4,"doc_module_name":9,"category_name":10,"show_sort_weight":11,"slug":12},1,"Document","Story & Novel",90,"story-novel",{"id":14,"doc_module":4,"doc_module_name":9,"category_name":15,"show_sort_weight":16,"slug":17},2,"Literature",80,"literature",{"id":19,"doc_module":4,"doc_module_name":9,"category_name":20,"show_sort_weight":21,"slug":22},4,"Exam",70,"exam",{"id":24,"doc_module":4,"doc_module_name":9,"category_name":25,"show_sort_weight":26,"slug":27},5,"Comic",60,"comic",{"id":29,"doc_module":4,"doc_module_name":9,"category_name":30,"show_sort_weight":31,"slug":32},6,"Technology",50,"technology",{"id":34,"doc_module":4,"doc_module_name":9,"category_name":35,"show_sort_weight":36,"slug":37},7,"Healthcare",40,"healthcare",{"id":39,"doc_module":4,"doc_module_name":9,"category_name":40,"show_sort_weight":41,"slug":42},8,"Research & Report",30,"research-report",{"id":44,"doc_module":4,"doc_module_name":9,"category_name":45,"show_sort_weight":46,"slug":47},9,"Religion & Spirituality",20,"religion-spirituality",{"id":46,"doc_module":4,"doc_module_name":9,"category_name":49,"show_sort_weight":46,"slug":50},"World Cup","world-cup",{"id":52,"doc_module":4,"doc_module_name":9,"category_name":53,"show_sort_weight":52,"slug":54},10,"Lifestyle","lifestyle",{"id":56,"doc_module":4,"doc_module_name":9,"category_name":57,"show_sort_weight":24,"slug":58},19,"General","general",{"code":4,"msg":60,"data":61},"ok",{"site_id":62,"language":63,"slug":64,"title":65,"keywords":66,"description":67,"schema_data":68,"social_meta":122,"head_meta":124,"extra_data":126,"updated_unix":128},105,"en","optocoupler-ultra-low-input-current-transistor-output-coupler-overview","Optocoupler Ultra-Low Input Current Transistor Output Coupler - Overview","","Devices that reduce part count and size are increasingly demanded in building management, HVAC systems, power supplies, and industrial equipment. It is also desirable to optimize optocoupler input current to improve performance and extend insulated equipment lifetime. The article presents transistor output couplers designed for these needs, highlighting ultra-low input current drive and a high optical transmission coefficient (high current transfer ratio, CTR), and discusses their motivation and key electrical characteristics for isolation device selection.",{"@graph":69,"@context":121},[70,84,104],{"@type":71,"itemListElement":72},"BreadcrumbList",[73,77,79,82],{"item":74,"name":75,"@type":76,"position":8},"https://docshare.wps.com","Home","ListItem",{"item":78,"name":9,"@type":76,"position":14},"https://docshare.wps.com/document/",{"item":80,"name":30,"@type":76,"position":81},"https://docshare.wps.com/document/technology/",3,{"item":83,"name":65,"@type":76,"position":19},"https://docshare.wps.com/document/optocoupler-ultra-low-input-current-transistor-output-coupler-overview/674285/",{"url":83,"name":65,"@type":85,"image":86,"author":91,"headline":65,"publisher":94,"fileFormat":97,"inLanguage":63,"description":67,"dateModified":98,"datePublished":98,"encodingFormat":97,"isAccessibleForFree":99,"interactionStatistic":100},"DigitalDocument",{"url":87,"@type":88,"width":89,"height":90},"https://docshare.wps.com/thumbnails/optocoupler-ultra-low-input-current-transistor-output-coupler-overview/674285.png","ImageObject",300,407,{"name":92,"@type":93},"Kurz","Person",{"url":74,"name":95,"@type":96},"DocShare","Organization","application/pdf","2026-11-04",true,{"@type":101,"interactionType":102,"userInteractionCount":8},"InteractionCounter",{"@type":103},"ViewAction",{"@type":105,"mainEntity":106},"FAQPage",[107,113,117],{"name":108,"@type":109,"acceptedAnswer":110},"Why is there growing demand for optocouplers with reduced size and part count?","Question",{"text":111,"@type":112},"Downsizing equipment footprints improves productivity, reduces energy consumption, and lowers transportation and installation burdens in industrial automation and building management systems.","Answer",{"name":114,"@type":109,"acceptedAnswer":115},"What performance targets does the presented transistor output coupler achieve?",{"text":116,"@type":112},"It focuses on ultra-low input current drive and a high optical transmission coefficient, expressed as a high current transfer ratio (CTR).",{"name":118,"@type":109,"acceptedAnswer":119},"How do the new products specify CTR?",{"text":120,"@type":112},"CTR is specified at IF = 0.05 mA and 1 mA, as listed in the product characteristics table for RV1S2x51A and RV1S2x55A devices.","https://schema.org",{"og:url":83,"og:type":123,"og:title":65,"og:site_name":95,"og:description":67},"article",{"robots":125,"canonical":83},"index,follow",{"doc_id":127,"site_id":62},674285,1793759610,{"code":4,"msg":5,"data":130},{"doc_id":127,"user_id":131,"nickname":92,"user_avatar":132,"doc_module":4,"category_id":29,"category_name":30,"doc_title":65,"doc_description":67,"doc_content":133,"file_id":134,"file_url":135,"file_type":136,"file_size":137,"view_count":8,"is_deleted":4,"is_public":8,"is_downloadable":8,"audit_status":8,"page_count":29,"language":138,"language_code":63,"site_id":62,"html_lang":63,"table_of_contents":139,"faqs":140,"seo_title":141,"seo_description":67,"update_tm":128,"read_time":142},2336478945635,"https://ap-avatar.wpscdn.com/davatar_6f874abed73319feea01a86fa6f0fab8","Yasufumi Kakihana, Senior Staff Engineer, Analog & Connectivity Product Group , Renesas Electronics Corp. Michinari Asai , Senior Manager, Analog & Connectivity Product Group, Renesas Electronics Corp.  \nAbstract  \nRecently , there has been a growing demand for devices that reduce part count and size to achieve downsizing in building management, HVAC systems, power supplies, and industrial equipment. Furthermore, optimizing the design of the optocouplers’ input current and extending their lifespan in insulated parts of the equipment is desirable.  \nThis article focuses on transistor output couplers that meet these market needs, featuring ultra-low input current and a high optical transmission coefficient, i.e. high current transfer ratio (CTR) .  \nIntroduction  \nIndustrial automation equipment including robot controllers, AC servos, and general-purpose inverters, as well as building management and HVAC systems, require a reduced equipment footprint in order to enhance floor efficiency in factories and buildings, accelerate transportation and installation, lower transportation costs, and make it compatible with workers and manual labor. Additionally , as the shortage of analog design engineers worsens, end equipment design is becoming more complex due to increasing demands for increased functionality, better accuracy and extended equipment lifespan.  \nIssues for Isolation Device Selection  \nBackground of Factory Equipment Footprint Reduction Trends  \nIn industrial automation equipment or building management / HVAC systems, reduced equipment footprint is essential for improving productivity and reducing energy consumption. Reduced factory footprints can be achieved through:  \n1. Space-saving: Increase productivity per floor area by reducing occupied space, minimizing factory building investments, shortening process work time, improving TAT (Turn Around Time) by reducing transport time in the factory, and increasing the number of management facilities per worker by reducing the distance between facilities. Additionally, achieve higher functionality within the same footprint, such as increasing the number of robot axes.  \n2. Flexible production lines: Creating adaptable factory layouts that can be easily modified in response to demand fluctuations and improvement activities, allowing for easier installation, transportation and configuration.  \n3. Eco-friendliness: Reducing material use (casing, board, wiring, etc. ), lowering energy consumption for factory-wide utilities like air conditioning and lighting, and decreasing transport energy per equipment (truck, ship, aircraft, etc. )  \nThese demands have led not only to the reduced size of equipment like robot controllers, AC servos, and inverters but also to the integration of connected devices, such as servo drives and motors.  \nFor home solar inverters, the shift towards zero-energy houses (ZEH) will increase installation demand. However, limited space on north-facing exterior walls or within homes poses challenges. Downsizing these components not only addresses space constraints but also eases transportation and construction work, reducing overall costs.  \nBackground to Design Ease  \nIndustrial equipment is becoming increasingly compact and precise , but these systems are not just composed of digital integrated circuits, which can be relatively easily optimized. They also handle analog functions like power supplies, some communications and A/D conversion, etc. making the design process significantly more complex. Additionally , analog circuit design requires skills and intuition gained from many years of experience, leading to a shortage of skilled analog design engineers in recent years. As a result , there is a pressing need to simplify the design of analog circuits.  \nRenesas Transistor Output Coupler Driving by Ultra-Low Input Current-RV1S2x51A and RV1S2x55A  \nThe Renesas RV1S2x51A and RV1S2x55A are DC-input and AC-input types, respectively, and are ultralow input current dr","cbCaik7qcLwqiJr6","https://ap.wps.com/l/cbCaik7qcLwqiJr6","pdf",827991,"English","# Introduction\n## Issues for Isolation Device Selection\n### Background of Factory Equipment Footprint Reduction Trends\n### Background to Design Ease\n## Renesas Transistor Output Coupler Driving by Ultra-Low Input Current-RV1S2x51A and RV1S2x55A\n## For Factory Equipment Footprint Reduction","[{\"question\":\"Why is there growing demand for optocouplers with reduced size and part count?\",\"answer\":\"Downsizing equipment footprints improves productivity, reduces energy consumption, and lowers transportation and installation burdens in industrial automation and building management systems.\"},{\"question\":\"What performance targets does the presented transistor output coupler achieve?\",\"answer\":\"It focuses on ultra-low input current drive and a high optical transmission coefficient, expressed as a high current transfer ratio (CTR).\"},{\"question\":\"How do the new products specify CTR?\",\"answer\":\"CTR is specified at IF = 0.05 mA and 1 mA, as listed in the product characteristics table for RV1S2x51A and RV1S2x55A devices.\"}]","Optocoupler Ultra-Low Input Current Transistor Output Coupler - Overview | PDF",15]