[{"data":1,"prerenderedAt":873},["ShallowReactive",2],{"$vjdR6ju7r_":3,"blog":34},{"id":4,"title":5,"author":6,"body":7,"date":23,"description":24,"extension":25,"keywords":26,"lang":26,"meta":27,"navigation":29,"path":30,"seo":31,"stem":32,"titile":26,"update":26,"__hash__":33},"content\u002Findex.md","EN Power Supply Blogs Home","Chan",{"type":8,"value":9,"toc":19},"minimark",[10,15],[11,12,14],"h1",{"id":13},"articles-related-to-en-power-supply","Articles related to EN power supply",[16,17,18],"p",{},"List of the blogs",{"title":20,"searchDepth":21,"depth":21,"links":22},"",2,[],"Apr 1, 2026","Home page of the blogs related to LED Power Supply, such as product production, application scenario, etc.","md",null,{"style":28},"practical-guide",true,"\u002F",{"title":5,"description":24},"index","J9j7cCCcIKS3JTQG7rJ3rI6XcXIq0SsTDh3DP3WQc1s",[35,261,382,586],{"id":36,"title":37,"author":38,"body":39,"date":254,"description":255,"extension":25,"keywords":26,"lang":26,"meta":256,"navigation":29,"path":257,"seo":258,"stem":259,"titile":26,"update":26,"__hash__":260},"blogs\u002F005.md","The role of Soviet in LED history","Kevin",{"type":8,"value":40,"toc":247},[41,44,51,56,71,74,102,105,132,138,141,163,167,170,202,206,220,224,227],[16,42,43],{},"#In the history of LEDs, the Soviet Union once played a pioneering role, but now it no longer holds the position it once had (Russia). Why is that?",[16,45,46,47],{},"In the story of LEDs (light-emitting diodes), the Soviet Union played a role marked by tragedy and a unique technological path. This history can be summarized as: ",[48,49,50],"strong",{},"a theoretical prophet, a practical laggard, and a distinctive 'yellow light' technological route.",[52,53,55],"h3",{"id":54},"_1-1920s-the-forgotten-prophet-losev","1. 1920s: The Forgotten 'Prophet' Losev",[16,57,58,59,62,63,66,67,70],{},"At the beginning of the LED story, the Soviet scientist ",[48,60,61],{},"Oleg Losev"," was a true pioneer, but his work was buried by the times.",[64,65],"br",{},"\nOleg Vladimirovich Losev (1903–1942) lived a life that is a typical tragedy of a ",[48,68,69],{},"'genius buried by his era.'"," Without a formal university degree, he came from a background of self-taught amateur science yet independently discovered the principle of the LED. He quietly passed away during the Siege of Leningrad from hunger and cold, and his contributions were not recognized by the world until decades later.",[16,72,73],{},"Losev was born into a noble family of the Russian Empire but lived in turbulent times, which made the start of his life full of obstacles.",[75,76,77,88],"ul",{},[78,79,80,83,84,87],"li",{},[48,81,82],{},"A life of upheaval",": Born in 1903 in Tver (some sources say Nizhny Novgorod), his father was an officer in the Tsar's army. After the October Revolution, being of noble lineage became a burden. Although he completed secondary education, due to his family background and the chaos of war, he ",[48,85,86],{},"never gained access to university training",", which remained a lifelong regret.",[78,89,90,93,94,97,98,101],{},[48,91,92],{},"Starting as a 'messenger'",": In 1920, he joined the ",[48,95,96],{},"Nizhny Novgorod Radio Laboratory (NNRL)",". Due to his low educational level, he initially could only work as a ",[48,99,100],{},"messenger and lab assistant"," (menial tasks), at times so poor that he slept on the staircases of the laboratory. Yet, through incredible self-learning ability and with the recognition of the famous physicist Vladimir Lebedinsky, he began engaging in core radio research.",[16,103,104],{},"Despite his humble status, Losev exhibited remarkable creativity in the 1920s, making two discoveries worthy of historical record.",[106,107,108,122],"ol",{},[78,109,110,113,114,117,118,121],{},[48,111,112],{},"Discovery of LED (Electroluminescence)",": Around 1924, while debugging silicon carbide (SiC) crystal detectors, he keenly noticed the faint ",[48,115,116],{},"green light"," at the junctions. Unlike his predecessors who ignored it, he systematically studied its spectrum and threshold and published a paper in 1927, naming it the \"luminous silicon carbide detector.\" He correctly pointed out that it was “cold light” (non-thermal radiation) and even applied for a patent for a \"photo relay,\" ",[48,119,120],{},"predicting the use of LEDs in optical communication",".",[78,123,124,127,128,131],{},[48,125,126],{},"Invention of the \"crystal oscillator\" (Crystodyne)",": He also discovered the negative resistance effect in certain crystals (such as zinc oxide) and created the world's earliest ",[48,129,130],{},"solid-state semiconductor amplifier",". This was more than 20 years earlier than the transistor and was praised as the \"transistor before the transistor.\"",[16,133,134,137],{},[48,135,136],{},"Ironically",", because semiconductor theory was not yet mature and his status was low, these achievements were ignored within the Soviet Union and went unheard of internationally.",[16,139,140],{},"After the 1930s, Loschev's situation took a sharp downturn, and fate was particularly cruel to him.",[75,142,143,153],{},[78,144,145,148,149,152],{},[48,146,147],{},"Academic discrimination",": Although he was unusually awarded the degree of Candidate of Sciences (similar to a PhD) in 1938, he was never able to obtain a formal professorship. In 1937, he was forced to leave the Physical-Technical Research Institute and moved to the ",[48,150,151],{},"Physics Department of the First Leningrad Medical Institute"," as an ordinary technician, completely detached from frontline scientific research.",[78,154,155,158,159,162],{},[48,156,157],{},"Tragic end",": In 1941, Nazi Germany besieged Leningrad (St. Petersburg). During the 872-day siege, Loschev, along with millions of citizens, was plunged into desperate conditions. ",[48,160,161],{},"On January 22, 1942",", this scientist who had once tried to transmit information with light starved to death in the cold, at only 38 years old. His remains were never found and most likely were hastily buried in a mass grave.",[52,164,166],{"id":165},"_2-cold-war-period-taking-a-detour","2. Cold War Period: Taking a \"Detour\"",[16,168,169],{},"When the United States launched efficient infrared and red LEDs in the 1960s based on gallium arsenide (GaAs), the Soviet Union chose a different technological path.",[75,171,172,182,192],{},[78,173,174,177,178,181],{},[48,175,176],{},"Material Choice",": The Soviet research system (represented by the Ioffe Institute of Physics and Technology) was not behind in research on III-V compounds (such as GaAs), but when it came to LED industrialization, it largely adopted the ",[48,179,180],{},"silicon carbide (SiC)"," route from the Loschev era.",[78,183,184,187,188,191],{},[48,185,186],{},"Unique \"Soviet Yellow\"",": In the 1970s-80s, the mainstream LEDs in the West were red and green (GaAsP\u002FGaP), while the Soviet Union produced a large number of ",[48,189,190],{},"silicon carbide yellow LEDs"," (such as the common КИПД series). These LEDs had very low luminous efficiency (very dim) and high driving voltage, but they were widely used in military and industrial equipment due to their unique stability.",[78,193,194,197,198,201],{},[48,195,196],{},"Cutting-edge Microdisplays",": The Soviet Union had its own expertise in military\u002Faerospace electronics. For example, the famous ",[48,199,200],{},"К490ИП1 (K490IP1)"," micro LED display integrated counters and decoders, was extremely small (about 2.5mm), and was widely used in aircraft instruments and military equipment. It remains a collectible among vintage electronics enthusiasts today.",[52,203,205],{"id":204},"_3-outcome-from-glory-to-silence","3. Outcome: From Glory to Silence",[75,207,208,214],{},[78,209,210,213],{},[48,211,212],{},"Military Supply",": The Soviet LED industry mainly served defense and aerospace (such as aircraft dashboards and missile indicators), with almost no presence in the civilian market. This meant that while the technology was reliable, it was expensive, and brightness stagnated for a long time.",[78,215,216,219],{},[48,217,218],{},"Missing the Lighting Revolution",": In the 1980s-90s, when Japan and the United States achieved breakthroughs in gallium nitride (GaN) blue LEDs (which directly led to white LEDs and the lighting revolution), the Soviet Union completely missed this wave of technological advancement due to economic collapse and interruptions in research. Russia's LED industry did not restart in aerospace and other specialized fields until after 2000.",[52,221,223],{"id":222},"summary","Summary",[16,225,226],{},"The Soviet Union's role in the history of LEDs was mixed:",[75,228,229,235,241],{},[78,230,231,234],{},[48,232,233],{},"High starting point",": It had theoretical geniuses like Lossev.",[78,236,237,240],{},[48,238,239],{},"Path dependency",": During the Cold War, it stubbornly adhered to the silicon carbide route, missing the wave of high-efficiency III-V compound (gallium arsenide, gallium nitride) LEDs.",[78,242,243,246],{},[48,244,245],{},"Legacy",": It left behind a large number of robust and durable yellow LEDs and microdisplays in metal packages with a strong 'Soviet aesthetic,' becoming a unique spectacle in electronic archaeology.",{"title":20,"searchDepth":21,"depth":21,"links":248},[249,251,252,253],{"id":54,"depth":250,"text":55},3,{"id":165,"depth":250,"text":166},{"id":204,"depth":250,"text":205},{"id":222,"depth":250,"text":223},"2026-05-19","In the history of LEDs, the Soviet Union once played a pioneering role, but now it no longer holds the position it once had (Russia). Why is that?",{"style":28},"\u002F005",{"title":37,"description":255},"005","KqJN1x4cltnFHTgxGBBL5P-P1nekC-pUoNpLTbAW44g",{"id":262,"title":263,"author":264,"body":265,"date":375,"description":376,"extension":25,"keywords":26,"lang":26,"meta":377,"navigation":29,"path":378,"seo":379,"stem":380,"titile":26,"update":26,"__hash__":381},"blogs\u002F004.md","The First Beam of LED","Yi Neng Chen",{"type":8,"value":266,"toc":369},[267,271,281,284,288,291,298,311,315,322,330,334,341,345,363,366],[11,268,270],{"id":269},"the-first-beam-of-light-from-the-led","The first beam of light from the LED",[272,273],"iframe",{"width":274,"height":275,"src":276,"scrolling":277,"border":278,"frameBorder":277,"framespacing":279,"allowFullScreen":280},800,600,"\u002F\u002Fplayer.bilibili.com\u002Fplayer.html?isOutside=true&aid=116555245422835&bvid=BV1g95x6AEQn&cid=38257691981&p=1","no",0,"0","true",[16,282,283],{},"The LED, which is now shining brilliantly, was discovered by accident in a laboratory more than 100 years ago. The people involved did not realize the significance of this great discovery and only published two brief passages in a scientific journal to describe the process of this accidental finding. Henry Joseph Round (1881–1966) was a typical 'cross-disciplinary genius.' He was not only the first person to discover the LED luminescence phenomenon but also one of the founders of radio technology (RCA).",[52,285,287],{"id":286},"_1-the-accidental-spark-in-the-laboratory","1. The \"Accidental Spark\" in the Laboratory",[16,289,290],{},"At that time, engineer H. J. Round from the United Kingdom was working at the Marconi Company, with his main task being the improvement of radio reception technology. The Marconi Company was the \"pioneer\" of radio communication. Founded in the UK, this company was the absolute leader in communication technology in the early 20th century, a position comparable to today’s “Apple-Huawei” duo.",[16,292,293,294,297],{},"One day in 1907, Round was testing a ",[48,295,296],{},"\"Cat's Whisker Detector\""," for radio detection. This device consisted of a fine metal wire (the cat's whisker) in contact with a silicon carbide (SiC, commonly called carborundum at the time) crystal and was an early prototype of a semiconductor diode.",[16,299,300,301,304,305],{},"In the dimly lit laboratory, Round attempted to apply a voltage between two contact points on the silicon carbide crystal to test its electrical conductivity. When the voltage reached about 10 volts, he was surprised to notice that near the contact point of the metal wire and the crystal, ",[48,302,303],{},"a faint yellow light was emitted",". When he increased the voltage further to 110 volts, the light grew brighter, and on some crystals, spots of green, orange, and blue light could also be observed.\n",[306,307],"img",{"alt":308,"src":309,"title":310},"The First Beam of Light from an LED","\u002Fimages\u002Fblog\u002F0001.png","LED Yellow Light",[52,312,314],{"id":313},"_2-a-text-message-that-changed-history","2. A Text Message That Changed History",[16,316,317,318,321],{},"The perceptive Landé realized that this was not ordinary incandescent light, but an unknown physical phenomenon. However, since semiconductor theory had not yet been established at the time (quantum mechanics was still in its infancy), he could not explain the principle theoretically and could only describe it as \"",[48,319,320],{},"a curious phenomenon",".\"",[16,323,324,325,329],{},"In 1907, he published a very short communication (only two paragraphs) in the magazine ",[326,327,328],"em",{},"Electrical World",", reporting this discovery to the editor. In the letter, he recorded the experimental phenomena in detail: the light always seemed to emanate from the negative electrode, and different crystals or contact points emitted different colors of light. He cautiously speculated that it might be related to thermoelectric effects and publicly sought references from the academic community regarding similar phenomena.",[52,331,333],{"id":332},"_3-the-forgotten-first-beam-of-light","3. The Forgotten 'First Beam of Light'",[16,335,336,337,340],{},"Unfortunately, because the light emitted by silicon carbide at the time was ",[48,338,339],{},"extremely weak"," (very low efficiency) and highly unstable, it could not compete with the mainstream incandescent bulbs of the period. Facing the dual difficulties of lacking theoretical support and practical prospects, Land himself tried to research it for several years, but ultimately had to give up. This significant discovery was then buried in the archives, lying dormant for nearly 20 years, until Soviet scientist Oleg Losev revived the research.",[52,342,344],{"id":343},"_4-historical-significance","4. Historical Significance",[75,346,347,357],{},[78,348,349,352,353,356],{},[48,350,351],{},"The 'Zero Generation' of LEDs",": Land's discovery first confirmed the existence of ",[48,354,355],{},"electroluminescence"," in solid-state semiconductor materials. Although the term 'LED' did not exist at the time, this is recognized as the origin of LED technology.",[78,358,359,362],{},[48,360,361],{},"The Return of SiC",": Interestingly, silicon carbide (SiC), which was abandoned back then due to low efficiency, has now become a core material of third-generation semiconductors, playing a key role in high-frequency, high-temperature, and high-power devices (such as fast charging and new energy vehicles).",[16,364,365],{},"It has been a century since the first ray of light was emitted from an LED, and truly large-scale applications have only occurred in the past twenty years. A technology often goes through various twists and turns and the efforts of countless people from discovery to maturity.",[16,367,368],{},"Land's story tells us that many great technological revolutions often begin with an inadvertent 'curious glance' in the laboratory.",{"title":20,"searchDepth":21,"depth":21,"links":370},[371,372,373,374],{"id":286,"depth":250,"text":287},{"id":313,"depth":250,"text":314},{"id":332,"depth":250,"text":333},{"id":343,"depth":250,"text":344},"2026-05-09","In 1907, British engineer Henry Joseph Round made an accidental operation in his laboratory, which became the starting point of LED history. This was not a carefully planned experiment, but a typical \"serendipitous discovery.\"",{"style":28},"\u002F004",{"title":263,"description":376},"004","8A2i7n7ZcLuDzNxhPmWri-c9zsrF-fkl3E_j1Hgqvg4",{"id":383,"title":384,"author":385,"body":386,"date":579,"description":580,"extension":25,"keywords":26,"lang":26,"meta":581,"navigation":29,"path":582,"seo":583,"stem":584,"titile":26,"update":26,"__hash__":585},"blogs\u002F003.md","The Origin of LEDs","Yinen Chen",{"type":8,"value":387,"toc":574},[388,393,397,511,515,547,551,554],[16,389,390,391,121],{},"LED (Light Emitting Diode) was not 'invented' by a single scientist at a specific moment, but rather evolved over more than half a century through a process of 'discovery-theory-application.' Its core principle is ",[48,392,355],{},[52,394,396],{"id":395},"i-key-milestone-timeline","I. Key Milestone Timeline",[398,399,400,420],"table",{},[401,402,403],"thead",{},[404,405,406,411,414,417],"tr",{},[407,408,410],"th",{"align":409},"left","Time",[407,412,413],{"align":409},"Person\u002FInstitution",[407,415,416],{"align":409},"Key Breakthrough",[407,418,419],{"align":409},"Significance",[421,422,423,440,456,472,495],"tbody",{},[404,424,425,431,434,437],{},[426,427,428],"td",{"align":409},[48,429,430],{},"1907",[426,432,433],{"align":409},"Henry J. Round (UK)",[426,435,436],{"align":409},"First observed yellow light emitted from energized silicon carbide (SiC)",[426,438,439],{"align":409},"Observed electroluminescence phenomenon but did not pursue further development",[404,441,442,447,450,453],{},[426,443,444],{"align":409},[48,445,446],{},"1920-1930s",[426,448,449],{"align":409},"Oleg Losev (Soviet Union)",[426,451,452],{"align":409},"Systematically studied and published papers, creating the first LED prototype",[426,454,455],{"align":409},"Theoretically confirmed LED feasibility, called the 'Father of LEDs'",[404,457,458,463,466,469],{},[426,459,460],{"align":409},[48,461,462],{},"1950s",[426,464,465],{"align":409},"Bell Labs and others",[426,467,468],{"align":409},"Explained the light emission principle of PN junctions based on semiconductor physics",[426,470,471],{"align":409},"Laid the theoretical foundation for modern LEDs",[404,473,474,479,482,489],{},[426,475,476],{"align":409},[48,477,478],{},"1962",[426,480,481],{"align":409},"Nick Holonyak Jr. (GE)",[426,483,484,485,488],{"align":409},"Invented the first ",[48,486,487],{},"visible light (red) LED"," (GaAsP)",[426,490,491,494],{"align":409},[48,492,493],{},"The birth year of modern LEDs",", hailed as the 'Father of LEDs'",[404,496,497,502,505,508],{},[426,498,499],{"align":409},[48,500,501],{},"1990s",[426,503,504],{"align":409},"Shuji Nakamura and others (Japan)",[426,506,507],{"align":409},"Breakthrough in blue LED technology (won the 2014 Nobel Prize)",[426,509,510],{"align":409},"Enabled white LEDs (blue light + phosphor), starting an illumination revolution",[52,512,514],{"id":513},"ⅱ-the-three-key-steps-of-technological-evolution","Ⅱ. The Three Key Steps of Technological Evolution",[106,516,517,527,537],{},[78,518,519,522,523,526],{},[48,520,521],{},"From “Discovery” to “Theory” (1907-1962)","\nEarly discoveries were merely accidental experimental phenomena. It wasn’t until semiconductor physics matured that scientists understood the principle: when electrons in a PN junction transition from a high energy level to a low energy level, they release energy in the form of ",[48,524,525],{},"photons (light)",". The material’s band gap determines the color of the light.",[78,528,529,532,533,536],{},[48,530,531],{},"The Birth of the Red LED (1962)","\nNick Holonyak of General Electric (GE) used ",[48,534,535],{},"gallium arsenide phosphide (GaAsP)"," material to successfully create humanity’s first practical visible light (red) LED. The initial brightness was very low and was only used for instrument indicator lights.",[78,538,539,542,543,546],{},[48,540,541],{},"Blue Light Breakthrough and the White Light Revolution (1990s)","\nThis was the most crucial leap. Japanese scientists Isamu Akasaki, Hiroshi Amano, and Shuji Nakamura conquered the high-brightness ",[48,544,545],{},"blue LED"," (gallium nitride-based) technology. With blue light, white light could be generated by exciting phosphors, thus fully opening the door to general lighting. They were awarded the 2014 Nobel Prize in Physics for this achievement.",[52,548,550],{"id":549},"_3-from-indicator-lights-to-general-lighting","3. From “Indicator Lights” to “General Lighting”",[16,552,553],{},"The history of LED development is also a history of the evolution of efficiency (luminous efficacy) and color:",[75,555,556,562,568],{},[78,557,558,561],{},[48,559,560],{},"1960s-70s",": Only low-brightness red, yellow, and green LEDs were available, used for calculators and radio indicator lights.",[78,563,564,567],{},[48,565,566],{},"1980s-90s",": High-brightness red, yellow, and green LEDs appeared, beginning to be used for outdoor large screens and traffic signals.",[78,569,570,573],{},[48,571,572],{},"2000s to present",": White LEDs became widespread, luminous efficacy surpassed fluorescent lamps, cost dropped drastically, and they were fully introduced into home, commercial, and industrial lighting, giving rise to new areas such as smart lighting and plant lighting.",{"title":20,"searchDepth":21,"depth":21,"links":575},[576,577,578],{"id":395,"depth":250,"text":396},{"id":513,"depth":250,"text":514},{"id":549,"depth":250,"text":550},"2026-05-08","The origin of LEDs (Light Emitting Diodes) was not the invention of a single scientist at one moment, but rather an evolutionary process of 'discovery-theory-application' spanning more than half a century. Its core principle is **electroluminescence**.",{"style":28},"\u002F003",{"title":384,"description":580},"003","9IZYGs4Nohp_iCe2e3208vEWYy_c_sKHDUM5-XlqF2k",{"id":587,"title":588,"author":38,"body":589,"date":866,"description":867,"extension":25,"keywords":26,"lang":26,"meta":868,"navigation":29,"path":869,"seo":870,"stem":871,"titile":26,"update":26,"__hash__":872},"blogs\u002F001.md","Can a flowing motor use an LED driver power supply?",{"type":8,"value":590,"toc":860},[591,594,608,612,618,621,625,633,641,648,671,678,692,696,722,726,733,754,761,769,776,781,789,794,798,803,820,854],[11,592,588],{"id":593},"can-a-flowing-motor-use-an-led-driver-power-supply",[16,595,596,597,602,603,607],{},"This is a very interesting and practical question! Indeed, in some specific scenarios, engineers choose to use an LED driver power supply to power small DC motors. As shown in the figure below:\n",[306,598],{"alt":599,"src":600,"title":601},"Application scenarios of LED switching power supply with 895 motor","\u002Fimages\u002Fscenario\u002F001.jpg","Motor Power Supply","\nIn this scenario, the power supply chosen is an LED rainproof power supply. This is a real case. The customer has a grinder that uses an 895 motor, supports 12V and 24V DC input, with speeds of 6000\u002F12000 RPM. At a 12V operating voltage, it runs at 6000 RPM, and at 24V operating voltage, it runs at 12000 RPM. The customer is using a 24V operating voltage. Now this power supply is broken and needs to be replaced. Originally, a JT-400-24RPC rainproof power supply was used. There are some circuit changes in this power supply, and we are not sure if it can still drive this motor, so we tried it ourselves first, but it really didn't work. Finally, we found this power supply to try, as shown in the picture below:\n",[306,604],{"alt":605,"src":606,"title":605},"CC-300-24 LED Lightbox power supply","\u002Fimages\u002Fbox\u002FCC30024.png","\nAlthough this power supply is labeled as 300W, its actual performance is quite good.",[272,609,611],{"src":610,"scrolling":277,"border":278,"frameBorder":277,"framespacing":279,"allowFullScreen":280},"\u002F\u002Fplayer.bilibili.com\u002Fplayer.html?bvid=BV1dudqBTEap&page=1"," ",[16,613,614,615],{},"Simply put, ",[48,616,617],{},"the mainstream LED switching power supply has already become a constant voltage power supply, and DC motors require a stable voltage source. Using an LED switching power supply to power a motor is a \"feasible\" and even \"cost-effective\" option, especially suitable for small power motors with low requirements for speed control and little variation in load.",[16,619,620],{},"Below is a detailed breakdown of its reasons, advantages and disadvantages, and precautions:",[52,622,624],{"id":623},"why-can-this-be-done-reasons","Why can this be done? (Reasons)",[106,626,627],{},[78,628,629,632],{},[48,630,631],{},"Cost and availability",":",[75,634,635,638],{},[78,636,637],{},"LED driver power supplies (especially switch-mode constant current types) have been mass-produced, drastically lowering costs. They come in various types and are easy to buy in the market.",[78,639,640],{},"Compared to DC regulated power supplies specifically designed for motors, LED drivers with the same power are often cheaper and more compact.",[106,642,643],{"start":21},[78,644,645,632],{},[48,646,647],{},"Similarity in power supply nature",[75,649,650,660],{},[78,651,652,655,656,659],{},[48,653,654],{},"Many low-power LED drivers are of the “constant voltage \u002F constant current (CV\u002FCC)” type",". When unloaded or lightly loaded, they operate in constant voltage mode, providing a stable output voltage (e.g., nominal 12V or 24V), which perfectly meets the basic requirement of DC motors for ",[48,657,658],{},"stable voltage",", as motor speed is proportional to voltage.",[78,661,662,663,666,667,670],{},"When the motor load increases and the current reaches the driver’s ",[48,664,665],{},"constant current point",", the power supply automatically switches to constant current mode, at which point the voltage drops to maintain a constant current. This acts as a ",[48,668,669],{},"natural overcurrent\u002Fstall protection",". Traditional voltage sources allow current to rise indefinitely during a stall, which can burn out the motor or power supply, whereas a constant current source limits the maximum current.",[106,672,673],{"start":250},[78,674,675,632],{},[48,676,677],{},"Suitable for specific working scenarios",[75,679,680,686],{},[78,681,682,685],{},[48,683,684],{},"Motors with relatively stable loads",": such as fans, small pumps, conveyor belts (with constant loads). The current of these devices doesn’t vary much during normal operation, and the motor mostly runs below the constant current point, with the power supply in constant voltage mode, working well.",[78,687,688,691],{},[48,689,690],{},"Situations with low requirements for low-speed torque",": The constant current characteristic causes the voltage to drop during heavy-load start-ups or sudden load changes, reducing motor speed. This is unsuitable for applications needing high starting torque or precise speed control, but acceptable for many simple uses.",[52,693,695],{"id":694},"advantages-of-doing-this","Advantages of Doing This",[75,697,698,704,710,716],{},[78,699,700,703],{},[48,701,702],{},"Low Cost",": As mentioned earlier, the most attractive point.",[78,705,706,709],{},[48,707,708],{},"Current Limiting Protection",": Prevents the motor from burning out immediately when stalled.",[78,711,712,715],{},[48,713,714],{},"Simplified Design",": No need to design additional complex overcurrent protection circuits.",[78,717,718,721],{},[48,719,720],{},"Easy to Implement Parallel Power Supply",": If you need to drive multiple small motors, you can directly take power in parallel from a sufficiently powerful LED driver, as long as the total current does not exceed the current limit.",[52,723,725],{"id":724},"major-disadvantages-and-risks-of-doing-this","Major Disadvantages and Risks of Doing This",[106,727,728],{},[78,729,730,632],{},[48,731,732],{},"Startup Issues (Highest Risk)",[75,734,735,738,744],{},[78,736,737],{},"The \"stall current\" of a DC motor at startup (when the rotor is not moving) is very high, usually 5-10 times the rated current.",[78,739,740,741,121],{},"An LED driver with insufficient design margin may enter protection mode (hiccup or shutdown) when faced with this huge startup current surge, causing the ",[48,742,743],{},"motor to fail to start",[78,745,746,749,750,753],{},[48,747,748],{},"Solution",": When choosing an LED driver, its ",[48,751,752],{},"constant current value (maximum output current) must be significantly higher than the motor's rated operating current"," (it is recommended to leave a 3-5 times margin) to ensure that the power supply does not enter continuous constant current protection at startup, the voltage can hold, and the motor can start smoothly.",[106,755,756],{"start":21},[78,757,758,632],{},[48,759,760],{},"Back-EMF Issue",[75,762,763],{},[78,764,765,766,121],{},"When the motor is running, it generates back electromotive force (equivalent to a generator). The LED driver circuit may not be designed to absorb this reverse energy, which can create voltage spikes during frequent start-stop or PWM speed control, ",[48,767,768],{},"damaging the LED driver power supply",[106,770,771],{"start":250},[78,772,773,632],{},[48,774,775],{},"Poor Dynamic Response",[75,777,778],{},[78,779,780],{},"The feedback loop of LED drivers is designed for slowly changing LEDs and responds very slowly to rapid changes in motor load. When the load suddenly increases, the voltage will drop and recover gradually, causing motor speed fluctuations.",[106,782,784],{"start":783},4,[78,785,786,632],{},[48,787,788],{},"Inconvenient Speed Control",[75,790,791],{},[78,792,793],{},"The most common way to control the speed of a DC motor is PWM (Pulse Width Modulation). However, applying a PWM signal directly to the motor terminal causes intermittent high currents that stress the LED driver. The best method is to use PWM to control the dimming input of the LED driver itself (if available), but this increases complexity.",[52,795,797],{"id":796},"conclusion-and-recommendations","Conclusion and Recommendations",[16,799,800],{},[48,801,802],{},"Yes, but with conditions.",[75,804,805,815],{},[78,806,807,810,811,814],{},[48,808,809],{},"Applicable scenarios",": DC motor applications that are ",[48,812,813],{},"low power (within tens of watts), with a stable load, and do not require high speed accuracy or dynamic response",". For example: small exhaust fans, display cabinet fans, small aquarium pumps, simple model setups, etc.",[78,816,817,632],{},[48,818,819],{},"How to choose an LED driver",[106,821,822,828,842,848],{},[78,823,824,827],{},[48,825,826],{},"Voltage matching",": The rated voltage should match the motor voltage (e.g., choose a 12V output for a 12V motor).",[78,829,830,833,834,837,838,841],{},[48,831,832],{},"Sufficient current margin",": The ",[48,835,836],{},"maximum output current (constant current point)"," of the driver should be at least ",[48,839,840],{},"three times the motor's rated current"," to ensure smooth startup.",[78,843,844,847],{},[48,845,846],{},"Prefer to choose the \"constant voltage\u002Fconstant current (CV\u002FCC)\" type",", and confirm its constant voltage operating range in the product datasheet.",[78,849,850,853],{},[48,851,852],{},"Sufficient power",": The total power (voltage × current) should be greater than the motor's rated power.",[16,855,856,859],{},[48,857,858],{},"If your application has requirements for motor startup performance, speed stability, or torque, or if the motor is relatively high power, be sure to use a DC regulated power supply or motor driver specifically designed for motors."," LED drivers are an \"economical and practical\" alternative and can be used in suitable low-cost projects as long as their limitations are clearly understood.",{"title":20,"searchDepth":21,"depth":21,"links":861},[862,863,864,865],{"id":623,"depth":250,"text":624},{"id":694,"depth":250,"text":695},{"id":724,"depth":250,"text":725},{"id":796,"depth":250,"text":797},"2026-04-01","This 300W 24V light box power supply is a carefully selected power supply that can drive an 895 DC motor.",{"style":28},"\u002F001",{"title":588,"description":867},"001","6DvRA3FGNsemRP_2GVzAMMYZ7vtN60awdW7q0vram34",1780216617356]