<\/strong><\/p>\n\n\n\nUnder and over voltage protection circuits are used to detect and protect against under and over voltage conditions. These circuits can be found in applications such as power supply, battery charging etc., where there is a need for both safety and reliability of equipment.<\/p>\n\n\n\n
Undervoltage Protection Circuit: If the input voltage falls below the set point value then this circuit will operate as an open-collector NPN transistor (Q2). The output will drive Q1 forward so that it makes current flow through R3 which provides resistance to the base current drawn by Q1 (see Figure 1). This causes current from source S2 through R4 which discharges R5 capacitor C5 through ZDETs FETs Q6 & 7 until its voltage reaches its set point value Vref again before turning into collector mode again after approximately 50ms (see Figure 2).<\/p>\n\n\n\n
Conclusion<\/strong><\/strong><\/p>\n\n\n\nWe have discussed the working of under voltage and over voltage protection circuits. These are important to protect electrical equipment from damage due to short circuit or overload.<\/p>\n","protected":false},"excerpt":{"rendered":"
Introduction Under voltage protection circuit and over voltage protection circuit are the most important circuits in a power supply. They are used to protect the equipment from damage or failure by over or under voltages. The articles below explain these circuits in detail with examples as well as applications of them. Introduction Under and over […]<\/p>\n","protected":false},"author":2,"featured_media":912,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[14],"tags":[224,223],"_links":{"self":[{"href":"https:\/\/fashionradicalsnews.com\/wp-json\/wp\/v2\/posts\/911"}],"collection":[{"href":"https:\/\/fashionradicalsnews.com\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/fashionradicalsnews.com\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/fashionradicalsnews.com\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/fashionradicalsnews.com\/wp-json\/wp\/v2\/comments?post=911"}],"version-history":[{"count":1,"href":"https:\/\/fashionradicalsnews.com\/wp-json\/wp\/v2\/posts\/911\/revisions"}],"predecessor-version":[{"id":913,"href":"https:\/\/fashionradicalsnews.com\/wp-json\/wp\/v2\/posts\/911\/revisions\/913"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/fashionradicalsnews.com\/wp-json\/wp\/v2\/media\/912"}],"wp:attachment":[{"href":"https:\/\/fashionradicalsnews.com\/wp-json\/wp\/v2\/media?parent=911"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fashionradicalsnews.com\/wp-json\/wp\/v2\/categories?post=911"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fashionradicalsnews.com\/wp-json\/wp\/v2\/tags?post=911"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}