How to Solve the Electromagnetic Interference Problem of LED Driver Power Supply with Schottky Diodes

时间： 2024-05-26 来源：LXMICRO Official Website

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The main aspects that engineers need to consider for LED power supply electromagnetic interference include circuit measures, EMI filtering, component selection, shielding, and printed circuit board anti-interference design.

In terms of component selection, it is generally believed that Schottky diodes have a greater impact. What are the methods to eliminate interference?

1.Reduce interference from the switching power supply itself

In terms of soft switching technology, inductance and capacitance components are added to the original hard switching circuit. Switching frequency modulation technology: by modulating the switching frequency fc, the energy concentrated on fc and its harmonics 2fc, 3fc... is dispersed to the surrounding frequency bands. Schottky diodes with small reverse recovery current and short recovery time are ideal devices for high-frequency rectification in switching power supplies. Installing electromagnetic interference filters in the input and output circuits of switching power supplies

2. Cut off the propagation path of interference signals

Use power line filters to filter out power line interference, improve the electromagnetic compatibility design of PCB boards, follow the general principles of PCB design, and comply with anti-interference design requirements.

3. Enhance the anti-interference ability of the interfered body

Various isolation measures (such as photoelectric isolation or magneto electric isolation) should be taken to block the propagation of interference. For LED power systems used outdoors or for power and signal lines introduced indoors from outside, lightning protection of the system should be considered.

The main control technologies for electromagnetic interference in LED power supply include circuit measures, EMI filtering, component selection (Schottky diodes), shielding, and anti-interference design of printed circuit boards.

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本文由三年不鸣转载自LXMICRO Official Website，原文标题为:How to solve the electromagnetic interference problem of LED driver power supply with Schottky diodes，本站所有转载文章系出于传递更多信息之目的，且明确注明来源，不希望被转载的媒体或个人可与我们联系，我们将立即进行删除处理。

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描述- 广东凌讯微是一家专注功率半导体器件研发、封装测试、销售与一体的国家高新技术企业，工厂面积1万平方，公司现有人员160余人，每年为业界提供超500KK优质的功率半导体器件产品。广东凌讯微能够为客户提供高质量，高可靠性的功率器件产品及全方位的技术支持，现有肖特基、LowVF肖特基、快恢复、高压MOS、中低压MOS、超结MOS等主力产品线；IGBT单管及碳化硅二极管也在小批量进行中，量产产品会陆续面世。产品广泛应用于各类电源适匹器、LED照明、无刷马达，锂电管理，逆变等领域。

型号- LT180N03AT,LSC04D120T,MBR3060CT,SBT20V100DC,MBR40200PT-B,MUR6060PTS,MUR2060DC,SBT10L150SCS,LSC04D120P,MBR4060CT-B,LT60N06AP,LT100N08AT,MBR3060DC,SBT20V100CT,MBR40150DC-B,CS18N20AF,MUR2040FCT,CS12N60A2,CS12N60A8,MBR4045DC-B,SBM60L60DC,SBT30L60DC,MBR20150FCT,SBM60L60CT,SBT40L45CT,MBR40200PTS-B,MUR1620CT,MBR60150PT,MBR6060PTS,MUR1620CS,MUR2060CT,MBR1045DC,SBT40L60PT,CS7N70A2,MBR3045FCT,MUR4020CT,CS7N70A5,MBR10200CT,MBR10200CS,MUR4040PTS-S,SBT30L60CT,MBR1045CS,MBR1045CT,MBR10200DC,SBT40L60PTS,LSC08D120T,LSC08D120P,LT100N08AD,LT100N08AG,LC60R130B,MUR2040CT-S,LC60R130F,LT100N08AP,MUR1560,LT40N03AG,LT40N03AD,SBT20L45DC,LT60N04AG,CS20N50A8,HBT30L200FCT,LT60N04AD,CS20N50A6,LT40N03AP,CS20N50A7,CS20N60A6,MBR4060FCT-B,SBT40L80PT,MBR1045FCT,SBT30L80CT,CS28N50A7,MUR3020FCT,CS28N50A6,CS20N60A8,CS20N60A7,CS3N50A5,CS3N50A4,SBT40U100PT,CS3N50A2,CS16N60A8,MUR3040FCT-B,HBT10L200SDC,CS16N60A6,MUR2020D,CS16N60A7,MUR2040PTS,LT60N03AP,SBT20V80CT,MBR60150PTS,SBT30L150PTS,MUR1040DC,HBT10L200SCT,LT60N03AG,LT60N03AD,LT15N10AD,MUR1040D,LT15N10AG,MUR3040FCT-S,SBT40L45DC,MBR40200DC-B,MUR1040CT,SBT20V80DC,MUR1040CS,MBR4045PT-B,MUR30120PT,MUR2040PT,CS5N65A2,HBT20L200PTS,CS5N65A4,CS5N65A5,MBR6045PT,MBR40150PT-B,CS7N60A2,MBR1645CS,SBT40L60FCT,MBR1645CT,LG100N08AT,HBT30L200PT,MUR1220FCT,CS7N60A4,MBR4045PTS-B,CS7N60A5,MBR1045D,MBR3045PTS,LSC10D200T,MUR840,LG100N08AD,MBR30150PTS,LG100N08AP,LT60N02AG,LSC10D200P,MBR40100PTS-B,LT60N02AD,CS4N70A2,MUR1060CS,MUR1060F,CS4N70A5,MUR1060D,MUR1680FCT,MUR1060CT,LSC20D120P,LG160N06AT,MUR1640DC,MBR2060FCT,MBR30200DC,LSC20D120T,LG160N06AP,MBR30200CT,LT150N03AT,CS8N65A2,MUR3020PT,LG60N10AT,LG160N06AG,LG60N10AP,LG160N06AD,MUR3060DC,CS8N65A5,CS8N65A4,MBR20100D,MBR20100CT,SBT40L80PTS,MBR20100CS,LT80N04AG,MUR3020PTS,MUR1060,MBR60200PTS,CS9N50A5,MBR3060PTS,CS9N50A2,SBT40L100DC,LT80N04AD,CS9N50A4,MBR20100DC,MUR860,SBM60L60PTS,HBT10L200SFCT,MBR30150PT,MBR30100PTS,SBT30L150PT,HBT30L200CT,SBT30L150FCT,CS2N60A5,CS2N60A4,HBT30L200DC,CS20N65A8,CS20N65A7,SBT40L45PTS,CS20N65A6,SBT40L100CT,CS2N60A2,SBT40U150CT,LT150N03AD,LT150N03AG,MBR1060FCT,CS10N65A2,SBM20L300DC,LT30N06AD,MBR40200FCT-B,LT150N03AP,LT30N06AG,MUR3060CT,LSC30D65T,MUR2020FCT,MBR10200FCT,LSC30D65P,CS10N65A5,MUR1640CT,MBR6045PTS,CS25N60A7,CS10N65A8,MUR1640CS,CS25N60A6,SBT40U150DC,MBR4060PTS-B,MBR30100CT,LG50N10AD,LG50N10AG,LSC20D90P,MBR30100CS,LG80N10AD,LG80N10AF,HBT30L200PTS,LSC20D90T,SBT40L80FCT,SBM60L60FCT,LT50N06AD,MBR30100DC,MBR3060PT,LT50N06AG,MUR4020PTS,LSC50D65T,HBT20L200PT,LT80N06AG,SBT30L60FCT,MBR30100FCT,MBR20200DC,MUR4040DC-S,SBT40U150FCT,LT30N03AG,SBT30L45PT,LT80N06AD,LSC50D65P,SBT40L45FCT,MBR20200CS,LT30N03AD,MBR20200CT,SBT40U150PTS,CS12N65A8,MUR5030PTS,LSC15D120P,MUR1620DC,LSC15D120T,MBR10150D,SBT30L100CT,LSC10D120P,LSC10D120T,SBT20V100FCT,CS25N50A8,SBT30L60PTS,CS25N50A7,CS25N50A6,MBR20200D,CS12N65A2,CS4N60A2,LG60N10AG,SBM20V60FCT,CS4N60A4,LG60N10AD,MBR2060DC,CS50N20AF,LT50N06AP,78D05,MUR4040PT-S,MBR10100DC,CS4N60A5,MBR10150FCT,SBT30L100DC,CS50N20AP,LT180N03AD,CS60N20A6,MUR1060DC,MUR1620D,LG50N10AT,MBR2060CS,LT180N03AG,CS50N20AT,LT60N06AG,MBR2060CT,MUR2040FCT-S,MBR10100CT,MBR10100CS,LT60N06AD,LT180N03AP,LG50N10AP,SBT10L100FCT,MBR3045CT,LC65R380D,LC65R380F,LG220N08AT,MUR30120PTS,MBR10100D,LG220N08AP,CS50N20A6,MUR4040CT-S,MBR3045DC,MBR60100PT,LSC20D65T,SBT20V150DC,CS10N60A2,CS7N65A2,CS25N65A7,MUR4020FCT,LSC04D65T,MBR2045FCT,CS7N65A5,MUR3040PT-S,MBR40100FCT-B,CS7N65A4,LSC20D65P,SBT30L45DC,SBT40L100PTS,SBT20V150CT,CS25N65A6,CS10N60A8,SBT40L60CT,CS10N50A2,LSC40D120P,LG200N04AD,MBR1060DC,HBT20L200CT,MUR1040FCT,MUR1660DC,SBT30L45PTS,MBR2060D,MUR840F,SBT30L45CT,CS10N50A8,MBR1060CT,MBR1060CS,SBT40L45PT,SBT10L100CT,HBT20L200DC,LSC40D120T,LG80N10AT,MBR40150FCT-B,LG80N10AP,CS16N65A8,CS16N65A6,LG80N10AG,MBR30200PTS,SBT10L100DC,MBR60100PTS,MUR1220CS,MUR1220CT,MUR1660FCT,CS10N70A2,SBM60L60PT,MUR2020DC,MBR30200PT,CS10N70A8,MUR3040PTS-S,CS13N50A8,SBM20L300CT,SBT30L80FCT,MUR3040PTS-B,MUR3020DC,LC65R280F,CS4N65A4,MUR3040DC-B,CS4N65A5,LT140N04AT,MBR4045FCT-B,CS4N65A2,MBR1645D,MUR2020CS,MBR3060FCT,MUR2020CT,LG200N04AP,MBR20200FCT,LG200N04AG,MUR1660CT,MBR40100PT-B,SBT40L100FCT,SBT40L60DC,MBR6060PT,MUR3060FCT,LT140N04AP,MUR3040DC-S,MUR860F,MUR3040PT-B,LT140N04AG,MUR6060PT,LT140N04AD,MBR20100FCT,MBR40100DC-B,LT120N03AP,CS18N50A8,CS18N50A7,CS34N20AF,CS18N50A6,CS34N20AT,LT80N03AG,LT120N03AG,CS34N20AP,MUR3020CT,LT80N03AD,LT120N03AD,CS8N50A5,CS8N50A4,SBT40U150PT,CS8N50A2,MUR4020PT,SBT30L45FCT,SBM20V60CS,SBM20V60CT,LC65R190F,SBT40U100PTS,MBR20150CT,MBR20150CS,SBT40U100CT,SBT40L80DC,MBR30100PT,LX13007A3,LX13007A2,MBR1645DC,LX13007A1,MBR20150DC,SBM20V60DC,LSC10D65T,SBT40U100DC,MBR1645FCT,LSC10D65P,MBR40150PTS-B,MUR5030PT,MUR3040CT-S,MBR4060PT-B,LC65R600F,LX13007B3,LX13007B2,LX13007B1,MUR2060FCT,MUR3040CT-B,LC65R600D,LT100N03AD,HBT20L200FCT,LT100N03AG,SBM20L300FCT,MUR2040DC,CS16N50A6,CS16N50A8,CS16N50A7,MBR40100CT-B,MUR1640FCT,LG120N10AD,LG120N10AF,MUR1560F,LG120N10AG,SBT30L100PT,SBT30L80DC,MUR3060PTS,LT100N04AP,SBT40U100FCT,LT100N04AT,MUR1060FCT,MBR30150FCT,MBR4060DC-B,MBR40200C

选型指南 - 凌讯微电子 - 2023/11/7 PDF 中文下载