金陵棋牌

金陵棋牌

» 新闻资讯

LED驱动电源直接影响着使用寿命,设计需要考虑这几个关键问题

文章来自:奥天科技     发布时间:2019-06-08

LED电流的大小直接影响着使用寿命,建议降额使用,因此尽量控制小点,特别是LED散热效果不好的话,LED一定要留足余量。LED驱动电源设计需要考虑这几个关键问题:

一、LED电流大小

LEDDIANLIUDEDAXIAOZHIJIEYINGXIANGZHESHIYONGSHOUMING,JIANYIJIANGESHIYONG,YINCIJINLIANGKONGZHIXIAODIAN,TEBIESHILEDSANREXIAOGUOBUHAODEHUA,LEDYIDINGYAOLIUZUYULIANG。

二、芯片发热

ZHEIZHUYAOZHENDUINEIZHIDIANYUANDIAOZHIQIDEGAOYAQUDONGXINPIAN。JIARUXINPIANXIAOHAODEDIANLIUWEI2mA,300VDEDIANYAJIAZAIXINPIANSHANGMIAN,XINPIANDEGONGHAOWEI0.6W,DANGRANHUIYINQIXINPIANDEFARE。QUDONGXINPIANDEZUIDADIANLIULAIZIYUQUDONGGONGLVMOSGUANDEXIAOHAO,JIANDANDEJISUANGONGSHIWEII=cvf(KAOLVCHONGDIANDEDIANZUXIAOYI,SHIJII=2cvf,QIZHONGcWEIGONGLVMOSGUANDEcgsDIANRONG,vWEIGONGLVGUANDAOTONGSHIDEgateDIANYA,SUOYIWEILEJIANGDIXINPIANDEGONGHAO,BIXUXIANGBANFAJIANGDIc、vHEf,RUGUOc、vHEfBUNENGGAIBIAN,NEIMEQINGXIANGBANFAJIANGXINPIANDEGONGHAOFENDAOXINPIANWAIDEQIJIAN,ZHUYIBUYAOYINRUEWAIDEGONGHAO。

三、功率管发热

GONGLVGUANDEGONGHAOFENCHENGLIANGBUFEN,KAIGUANSUNHAOHEDAOTONGSUNHAO。YAOZHUYI,DADUOSHUCHANGHETEBIESHILEDSHIDIANQUDONGYINGYONG,KAIGUANSUNHAIYAOYUANDAYUDAOTONGSUNHAO。KAIGUANSUNHAOYUGONGLVGUANDEcgdHEcgsYIJIXINPIANDEQUDONGNENGLIHEGONGZUOPINLVYOUGUAN,SUOYIYAOJIEJUEGONGLVGUANDEFAREKEYICONGYIXIAJIGEFANGMIANJIEJUE:

1、BUNENGPIANMIANGENJUDAOTONGDIANZUDAXIAOLAIXUANZEMOSGONGLVGUAN,YINWEINEIZUYUEXIAO,cgsHEcgdDIANRONGYUEDA。RU1N60DEcgsWEI250pFZUOYOU,2N60DEcgsWEI350pFZUOYOU,5N60DEcgsWEI1200pFZUOYOU,CHABIETAIDALE,XUANZEGONGLVGUANSHI,GOUYONGJIUKEYILE。

2、SHENGXIADEJIUSHIPINLVHEXINPIANQUDONGNENGLILE,ZHEILIZHITANPINLVDEYINGXIANG。PINLVYUDAOTONGSUNHAOYECHENGZHENGBI,SUOYIGONGLVGUANFARESHI,SHOUXIANYAOXIANGXIANGSHIBUSHIPINLVXUANZEDEYOUDIANGAO。BUGUOYAOZHUYI,DANGPINLVJIANGDISHI,WEILEDEDAOXIANGTONGDEFUZAINENGLI,FENGZHIDIANLIUBIRANYAOBIANDAHUOZHEDIANGANYEBIANDA,ZHEIDOUYOUKENENGDAOZHIDIANGANJINRUBAOHEQUYU。RUGUODIANGANBAOHEDIANLIUGOUDA,KEYIKAOLVJIANGCCM(LIANXUDIANLIUMOSHI)GAIBIANCHENGDCM(FEILIANXUDIANLIUMOSHI),ZHEIYANGJIUXUYAOZENGJIAYIGEFUZAIDIANRONGLE。

四、工作频率降频

ZHEIGEYESHIYONGHUZAIDIAOSHIGUOCHENGZHONGBIJIAOCHANGJIANDEXIANXIANG,JIANGPINZHUYAOYOULIANGGEFANGMIANDAOZHI。SHURUDIANYAHEFUZAIDIANYADEBILIXIAO、XITONGGANRAODA。DUIYUQIANZHE,ZHUYIBUYAOJIANGFUZAIDIANYASHEZHIDETAIGAO,SUIRANFUZAIDIANYAGAO,XIAOLVHUIGAODIAN。DUIYUHOUZHE,KEYICHANGSHIYIXIAJIGEFANGMIAN:

1、JIANGZUIXIAODIANLIUSHEZHIDEZAIXIAODIAN;

2、BUXIANGANJINGDIAN,TEBIESHIsenseZHEIGEGUANJIANLUJING;

金陵棋牌 3、JIANGDIANGANXUANZEDEXIAODIANHUOZHEXUANYONGBIHECILUDEDIANGAN;

金陵棋牌 4、JIARCDITONGLVBOBA,ZHEIGEYINGXIANGYOUDIANBUHAO,CDEYIZHIXINGBUHAO,PIANCHAYOUDIANDA,BUGUODUIYUZHAOMINGLAISHUOYINGGAIGOULE。WULUNRUHEJIANGPINMEIYOUHAOCHU,ZHIYOUHUAICHU,SUOYIYIDINGYAOJIEJUE。

五、电感或者变压器的选择

金陵棋牌 DUOYONGHUFANYING,XIANGTONGDEQUDONGDIANLU,YONGaSHENGCHANDEDIANGANMEIYOUWENTI,YONGbSHENGCHANDEDIANGANDIANLIUJIUBIANXIAOLE。YUDAOZHEIZHONGQINGKUANG,YAOKANKANDIANGANDIANLIUBOXING。YOUDEGONGCHENGSHIMEIYOUZHUYIDAOZHEIGEXIANXIANG,ZHIJIEDIAOJIEsenseDIANZUHUOZHEGONGZUOPINLVDADAOXUYAODEDIANLIU,ZHEIYANGZUOKENENGHUIYANZHONGYINGXIANGLEDDESHIYONGSHOUMING。

SUOYISHUO,ZAISHEJIQIAN,HELIDEJISUANSHIBIXUDE,RUGUOLILUNJISUANDECANSHUHEDIAOSHICANSHUCHADEYOUDIANYUAN,YAOKAOLVSHIFOUJIANGPINHEBIANYAQISHIFOUBAOHE。BIANYAQIBAOHESHI,LHUIBIANXIAO,DAOZHICHUANSHUdelayYINQIDEFENGZHIDIANLIUZENGLIANGJIJUSHANGSHENG,NEIMELEDDEFENGZHIDIANLIUYEGENZHEZENGJIA。ZAIPINGJUNDIANLIUBUBIANDEQIANTIXIA,ZHINENGKANZHEGUANGSHUAILE。