白小姐四肖必选一肖

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5050白光并联?串联?LED驱动电路选择


    来源:  时间:2015-05-07  【字体:  

      5050白光时代来临后,我们在生活的各个方面都看得见它的身影,无论是汽车领域、智能领域亦或是工业领域,因其具有高效、节能、寿命长、环保等特点,已成为现今技术的可选方案,并逐渐被应用于照明。促使人们关注技术的一个关键因素是,其大大降低了能源的消耗,并可实现长期可靠的工作。今天我们就从一个实用的LED电路给大家延伸性的介绍LED照明驱动电路。

      本文先从采用恒流源的电路开始,本电路中的主要元件三极管,要求其耐压要400V以上,功率也要10W以上的大功率管,如MJE13003、MJE13005等,并且要加上散热片,滤波电容C容量为4.7uF,耐压要有400V以上,发光管电流的大小由R2调整决定,为方便调整可用可变电阻调整后再换上相同阻值的固定电阻,本电路可带发光管数量少则十几只,最多可达到90多只,虽然增加了一些成本,但使用效果要比只用电阻限流的电路好得多,即使电压波动较大,电路仍然能保持电流恒定不变,这对发光管的寿命是非常有利的,在此范围内的电流都能基本保持恒定不变。本电路使用发光管数量也不可太少,越少其效率也越低。本电路总耗电功率约6W。

      恒流源的电路

      ZAIZHEILISHUNBIANJIDAJIAJIANGJIANGLEDCAIYONGBINGLIANJIEFAHAOHAISHICAIYONGCHUANLIANJIEFAHAO?

      LEDCAIYONGBINGHUOCHUANLIANJIEFA,ZHUYAOYINGGAIGENJUDIANYUANHEDIANLUDEXINGSHIJIYAOQIUJUEDING。

    白小姐四肖必选一肖   CAIYONGCHUANLIANJIEFADEDIANLU,DANGQIZHONGYIZHILEDDUANLUSHIZHENGCHUANDELEDDOUBULIANG;DANDANGQIZHONGYIZHILEDDUANLUSHIQITALEDDOUHAINENGLIANG。CAIYONGBINGLIANJIEFADEDIANLU,DANGQIZHONGYIZHILEDDUANLUSHIQITADELEDDOUHAINENGLIANG;DANDANGQIZHONGYIZHILEDDUANLUSHIZEZHENGGEDIANLUDEDIANYUANJIANGBEIDUANLU,ZHEIYANGBUJINQITADELEDDOUBUNENGZHENGCHANGGONGZUO,ERQIEHAIYOUKENENGSUNHUAIDIANYUAN。GUXIANGBIZHIXIAHAISHICHUANLIANJIEFADEDIANLUJIAOYOUYOUSHI。

    白小姐四肖必选一肖   BINGLIANJIEFAZHIXUYAOZAIMEIGELEDLIANGDUANSHIJIAJIAODIDEDIANYA,DANXUYAOLIYONGZHENLIUDIANZUHUODIANLIUYUANLAIBAOZHENGMEIGELEDDELIANGDUYIZHI。RUGUOLIUGUOMEIGELEDDEPIANZHIDIANLIUDAXIAOBUTONG,ZETAMENDELIANGDUYEBUTONG,CONGERDAOZHIZHENGGEGUANGYUANLIANGDUBUJUNYUN。RANER,LIYONGZHENLIUDIANZUHUODIANLIUYUANLAIBAOZHENGLEDDELIANGDUYIZHIJIANGSUODUANDIANCHIDESHIYONGSHOUMING。CAIYONGCHUANLIANJIEFABENZHISHANGKEYIHENHAOBAOZHENGLIUGUOMEIZHILEDDIANLIUDEYIZHIXING,DANYAOQIUDIANYUANDIANYAYAOGAO。LEDCAIYONGBINGLIANJIEFASHI,YOUYUDIANLUDEZONGDIANLIUSHIGEGELEDDIANLIUZHIHE,SUOYIYAOQIUDIANYUANYAONENGGONGJIZUGOUDADEDIANLIU。

    白小姐四肖必选一肖   QISHIYANGEYIYISHANGBINGLIANHUOCHUANLIANJIEFAGEYOUTAMENDEYOUQUEDIAN。XUYAONIZAISHIYONGDEYUYIKAOLVDUOFANGMIANYINSU。ZAISHIJIYUNYONGZHONGCHANGCAIYONGCHUANBINGLIANXINGCHENGDELEDZHENLIE,ZHEIYANGKEYIKEFUHUOJIANXIAOSHANGSHUDANGELEDDUANLUHUODUANLUZAOCHENGZHENGCHUANLEDBULIANGHUODUIZHENGGEDIANLUHEDIANYUANDEYINGXIANG。SUOWEICHUANBINGLIANJIUSHIXIANYONGSHAOLIANGLEDCHUANLIANZAICHUANZHENLIUDIANZUZUCHENGYITIAOZHILU,ZAIJIANGRUOGANTIAOZHILUBINGLIANZUCHENG“ZHILUZU”。CIWAI,HAINENGCAIYONGCHUANBINGCHUANXINGSHI,JIUSHIZAIYIZUCHENGDE“ZHILUZU”DEJICHUSHANG,ZAIJIANGRUOGAN“ZHILUZU”CHUANLIANGOUCHENGZHENGGEDENGJUDIANLU,CIZHONGJIEFABUJINSUOXIAOLEYIZHILEDGUZHANGSHIDEYINGXIANGMIAN,ERQIEJIANGZHENLIUDIANZUHUAZHENGWEILING,JIANGJIZHIDAGONGLVDIANZUBIANCHENGJISHIZHIXIAOGONGLVDIANZU,YOUJIZHONGANZHUANGBIANCHENGFENSANANZHUANG,ZHEIYANGJILIYUDIANZUSANRE,YOUKEYIJIANGDENGJUSHEJIDEGENGJINCOU。

    白小姐四肖必选一肖   SHOUXIANRENHEDIANLUWOMENBIXUYAOKAOLVQIDIANYUANQUDONG,TONGCHANGQUDONGLEDCAIYONGZHUANYONGHENGLIUYUANHUOZHEQUDONGXINPIAN,RONGYISHOUTIJIHECHENGBENDENGYINSUDEXIANZHI,ZUIJINGJISHIYONGDEFANGFAJIUSHICAIYONGDIANRONGJIANGYASHIDIANYUAN。YONGTAQUDONGXIAOGONGLVLED,JUYOUBUPAFUZAIDUANLU、DIANLUJIANDANDENGYOUDIAN,ERQIEYIGEDIANLUNENGQUDONG1~70GEXIAOGONGLVLED(DANSHI,ZHEIZHONGDIANYUANDIANLUQIDONGSHIDEDIANLIUCHONGJI,YOUQISHIPINFANQIDONG,HUIJILEDZAOCHENGPOHUAI。DANGRAN,CAIQUSHIDANGDEBAOHUBIANKEBIMIANZHEIZHONGCHONGJI,ZAIZHEIFANGMIAN,KEYICAIYONGANSENMEIBANDAOTIDENUD4700 LEDFENLIUBAOHUJIEJUEFANGAN。ZAILEDZHENGCHANGGONGZUOSHI,XIELOUDIANLIUJINWEIJIN100 μA;ERZAIZAOYUSHUNTAIHUOLANGYONGTIAOJIANSHI,LEDJIUHUIKAILU,ZHEISHINUD4700FENLIUBAOHUQISUOZAIDEFENLIUTONGDAOJIHUO,SUODAILAIDEYAJIANGJINWEI1.0 V,JIANGDAIJIDIANLUDEYINGXIANGJINKENENGDIJIANXIAO。ZHEIQIJIANCAIYONGJIESHENGKONGJIANDEXIAOXINGFENGZHUANG,SHEJIYONGYU1 W LED(EDINGDIANLIUWEI350 mA@ 3 V),RUGUOSANRECHULIQIADANG,YEZHICHIDAYU1 ADIANLIUDECAOZUO。

      电容降压式电源的典型电路

    白小姐四肖必选一肖   DUIQUDONGDIANLUDEJIANCHA,YINGGAIGENJUDIANLUTUZIXIHEDUIDIANLUSHIFOUJIECUO,TEBIEZHUYIJIANCHAZHENGLIUQIAO(ZHANGJIAODESHIZHENGJISHUCHU,QIDUIJIAOSHIFUJISHUCHU,LINGWAILIANGJIAOSHIJIAOLIUSHURU)HUOZHENGLIUERJIGUANYIJIWENYAERJIGUANDEJIXINGSHIFOUZHENGQUE(YINYOUHEIXIANHUOBAIXIANDEYIDUANSHIFUJI),HAIYOUJIANCHAJINGTISANJIGUANHUOWENYAJICHENGDIANLUDESANGEDIANJISHIFOUCUOJIEDENG。

      C1WEIJIANGYADIANRONGQI(CAIYONGJINSHUHUAJUBINGXIDIANRONG),R1WEIC1TIGONGFANGDIANHUILU。DIANRONGC1WEIZHENGGEDIANLUTIGONGHENGDINGDEGONGZUODIANLIU。DIANRONGC2WEIDIANJIEDIANRONG,QINAIYAZHIQUJUEYUSUOCHUANLIANDELEDDEGESHU(YUEWEIQIZONGDIANYADE1.5BEIYISHANG),TADEZHUYAOZUOYONGSHIYIZHITONGDIANSHUNJIANYINQIDEDIANYATUBIAN,CONGERJIANGDIDIANYACHONGJIDUILEDSHOUMINGDEYINGXIANG。R4WEIDIANRONGC2DEXIELIUDIANZU,QIZUZHIYINGSUIZHELEDGESHUDEZENGJIASHIDANGZENGJIA。

    白小姐四肖必选一肖   YOUYUDIANRONGJIANGYADIANYUANSHIYIZHONGFEIGELISHIDIANYUAN,ZAITONGDIANSHUNJIANHUICHANSHENGHENDADEDIANLIU,YEJIUSHISUOWEIDELANGYONGDIANLIU。CIWAI,YOUYUWAIJIEHUANJINGDEYINGXIANG(RULEIJI) DIANWANGXITONGHUIQINRUGEZHONGLANGYONGXINHAO,YOUXIELANGYONGHUIDAOZHILEDDESUNHUAI。SUOYI,YAOTIGONGREMINDIANZUBAOHU,ZHEIGEZHUYAOYOUFUWENDUXISHUREMINDIANZUBAOHU(NTCREMINDIANZU,NTCSHINegative Temperature CoefficientDESUOXIE)HEZHENGWENDUXISHUREMINDIANZUBAOHU(PTC(Positive Temperature Coefficient))RANHOUYOUSHUNTAIDIANYAYIZHIQIBAOHU((Transient Voltage Suppressor),JIANCHENGTVS)

      FUWENDUXISHUYISISHIFUDEWENDUXISHU,FANZHIFUWENDUXISHUHENDADEBANDAOTICAILIAOHUOYUANQIJIAN,XIANZHILANGYONGDIANLIUDEZUIJIANDANYOUXIAODEFANGFASHIZAIXIANLUSHURUDUANCHUANLIANYIZHINTCREMINDIANZU

    白小姐四肖必选一肖   ZHENGWENDUXISHUDIANLIUTONGGUOPTCREMINDIANZUHOUYINQIWENDUSHENGGAO,JIFARETIDEWENDUSHANGSHENG,DANGCHAOGUOJULIDIANWENDUHOU,DIANZUZENGJIA,CONGERXIANZHIDIANLIUZENGJIA,YUSHIDIANLIUDEXIAJIANGDAOZHIYUANJIANWENDUJIANGDI,DIANZUZHIDEJIANXIAOYOUSHIDIANLUDIANLIUZENGJIA,YUANJIANWENDUYOUSHENGGAO,ZHOUERFUSHI。

    白小姐四肖必选一肖   SHUNTAIDIANYAYIZHIQIZHUYAOYONGYUDUIDIANLUYUANJIANJINXINGKUAISUGUOYABAOHU。DANGTVSGUANLIANGJISHOUDAOFANXIANGSHUNTAIGAONENGLIANGCHONGJISHI,TANENGYI10-12sLIANGJIDESUDUJIANGLIANGJIJIANDEGAOZUKANGBIANWEIHENDIDEZUKANG,XISHOUGAONENGLIANGDELANGYONG,JIANGLIANGJIJIANDEDIANYAQIANWEIYUGEYUDINGZHI,BAOHUDIANZIXIANLUZHONGDEYUANQIJIANMIANSHOUGEZHONGLANGYONGMAICHONGDECHONGJIERSUNHUAI。

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