[报告精品]产品硬件设计规范

XXXXXXXX有限公司发行产品硬件设计规范文件编号XXXXXX版本生效日期核准审核编写172000/3/17至少以下部门或地点必须持有该文件之部分或全部公司领导（6）品质工程部工业设计部通信产品研究部网络产品研究部瘦客户机研究部移动计算研究部收文XXXA1A2A3A4A5A6A7A8A9A10A11A12XXXXXXXX有限公司产品硬件设计规范文件编号XXXXXX文件目录版次17页次1/1序号文件细目页数备注1硬件设计工作流程规范10附件5页，附表2页2硬件系统设计原则23电源设计规范24EMC设计规范35PCB布线图设计规范36波峰焊对PCB布板要求27用PADS设计PCB布线操作流程128用CANDENCE设计PCB布线操作流程129SMT设计规范710产品硬件安全设计规范311硬件审核规范212硬件设计文件输出规范6附表4页13硬件版本制订规范114附则本规范经呈总经理核准后，自生效日期起执行，修改时亦同。附则不另外制作收文0502CA0A13A14A15A16A17A18A18A19A19A20A21A22A23XXXXXXXX有限公司产品硬件设计规范文件编号XXXXXX文件修订履历表页次1序次修订页次修改内容摘要新版次01/1硬件设计工作流程规范增加附件一STAR510G终端硬件测G16809规范G727附件G1120STAR510G终端硬件G8181G3371测G16809。1102121增加硬件版本修订规范G7272目G5417G11468G5224修改。120311修改附件一61G1025G6251电G5390G5242G2462G2474G9052表G7696。130481G2474G9052原“PCBG11352SMD布板规范”,增加“SMT设计规范”。140581修订“SMT设计规范”全G12699。150681G256SMT设计规范”增加焊G11436G2462G11345G8845图G11352G6502版原则G7272增加G256波峰焊对PCB布板要求G257。3目G5417G11468G5224修改。160791G3324G256SMT设计规范G257G1025作以下G2476G736811增加G6352板G2462工G14414G17805G11352G1867G1319要求G2656G7053G8873G72712G2476G7368G3534G7643G11352G16840G7138G72713G2476G7368部分G10267G5347G1815件焊G11436要求。14页数增加G10387页。2G11468G5224修订目G5417。17收文0503CA24A25A26A27A28A29A30A30A31A31A32A33A34A35XXXXXXXX有限公司产品硬件设计规范文件编号WIC026硬G3件G3设G3计G3工G3作G3流G3程G3规G3范G3版G3次G3G20G17G20G3页G3次G3G20G18G22G31G2529G16801G16311G1833411时序图一G14336以时G19059或G7588一信号G1038G2454G10043G10301，G6563G13484出G2520输G1849/输出信号之G19400G11352时G19400G1863系图。2硬件设计工作流程图A36A37A38A39A40A41A42A43A44A45A46A47A48A49A46A47A48A50A51A46A47A48A50A51A46A47A48A50A51A46A47A48A49A46A47A48A50A51A46A47A48A49A46A47A48A50A51A46A47A48A49A46A47A48A50A51A46A47A48A50A51A46A47A48A49A52A53A54A46A47A55A56A44A57A58A59A60A61A62A63A64A65A66A67A57A58A68A69A70A71A53A54A66A67A72A69A70A71A73A74A41A75A76JOBA77A78A79A80A67A66A67A57A58A68A69A70A71A53A54A66A67A72A69A70A71A73A74A41A77JOBA80A67收文0505CA81A82A83A84A85A86,A87A88A89A90A91A92A93A94A95A96A97A98A99A100A101A102A103A104A105A106A107A108A102A103A95A96A97A98A99A109A110A111A112A95A96A102A113A111A112A98A99A104A102A113A114A115A116A117A118A119A120A121A111A112A95A96A122A123A124A118A119PCBA125A126A127A128A129PCBA130A131A132PCBA127A133A134A135A136A137A135A138A139A140,A135A138A141A142A143A144A140A145A146A144A140A147A148A149A146A127A150A132A151A152A153PCBA154A127AXXXXXXXX有限公司产品硬件设计规范文件编号WIC026硬G3件G3设G3计G3工G3作G3流G3程G3规G3范G3版G3次G3G20G17G20G3页G3次G3G21G18G22G3A155A156A157A158A159A160A161A162A163A155A156A157A164AA165A166A167A168A169A170A171A172A173A174A165A166A175A170A171A1723内容31G20045目G13464G2604G1393G256新产品G20045目规G2022表G257G17839行G2520G8181G3371G17935G17765G2462G1039要时序图设计。G5194G3647G1901G256G8181G3371G16826细设计G16840G7138G1082G257附表一32G2499G2454G13783G256硬件系统设计原则G257G17839行。设计时G5224G1817分G13783G15397EMC设计，G16277G256EMC设计规范G257。33G1863G19202电G17347G2462G1863G19202部品G11352G17885G6333时G5224G1820G1582G4466G20576，G5194G3647G1901G256硬件G8181G3371G16855G16809G6265G2590”附表G1120。331G16855G16809G6265G2590内容G5224G2265G63361G8181G3371G11352G5627G14033G6363G76432测G16809G7053G88733测G16809G17819程G16772G5417G2462G13479G7536332G14521G6323制G13785G994G4466G20576G13785不同,G5224G1116以G16840G7138,G11013G20045目G13464G19283审核333G10628以STAR510G终端G1038G1375，G16277附件一，附件G1120。34G19762G5132规G5627G14033G2499G19764G5627G4466G20576，G1039要G1582G5627G14033G6363G7643G3926MODEM加G2520G12193G6451G1272下G11352G2546G2532G18339G16809G20576G12573。35PCBG11352设计G5224G13783G15397外G3783G11352G4622G4556G13479构，G5194G1817分G13783G15397G6251干扰、FCC、安规G12573G7053面G11352因素。G1867G1319G16277G256PCB布线图设计规范G257G2462G256PCBG11352SMD布板规范G25736电原理设计G3324微机上采用ORCAD，G3324工作站上用CANDENCEG11352CONCEPT软件设计。收文0505CA176A177A178A179A180A181,A182A183A184A185A186A187A188A189A190A191A192A193A190A194A195A196A197A198A199A200A201A202A203XXXXXXXX有限公司产品硬件设计规范文件编号WIC026硬件设计工作流程规范版次11页次3/337样机评审时G5224提供G256产品硬件测G16809G6265G2590G257附表G1120,内容G5224G2265G6336针对硬件总G1319规G2022G1025G1039要G5627G14033G6363G7643G17839行测G16809得出G11352G13479G7536G14521G6323制G13785G994G4466G20576G13785不同G5224G1116以G16840G7138,G11013G20045目G13464G19283审核4附件附件一STAR510G终端硬件测G16809规范附件G1120STAR510G终端硬件G8181G3371测G168095附表附表一硬件G8181G3371G16826细设计G16840G7138G10820415附表G1120硬件G8181G3371G16855G16809G6265G2590/产品硬件测G16809G6265G25900416收文_0505CA204A205A206A207A208A209,A210A211A212A213XXXXXXXX有限公司硬件设计工作流程规范文件编号WIC026附件一STAR5G200G终端硬件测G16809规范G3版G3次G3G20G17G22G3页G3次G3G20G18G21G3本规范专G1038STAR510G终端G11352硬件测G16809而编G1901，目G11352是G1038了对终端G11352硬件测G16809G17819程有个G7138确G11352规定。规定了对STAR510G终端硬件G17839行测G16809G11352内容、设备、手段G2462G17819程。1电源适G5224G14033力11G6363G7643G14033G3324AC150250V、50HZ1HZ下正G5132工作，即电源输出G10385V5，12V10。12测G16809G7053G8873用交流G16855压器、万用表来G16855整输G1849交流电压150250V，示波器测频率，再测输出电源电压。13测G16809G2462G13479G7536G16772G5417G3324”产品硬件测G16809G6265G2590”G1025。2RS232异步通讯口G11352电平G2462带载G14033力测G1680921G6363G7643满足GB6107（G12573效EIARS232）G11352电平要求。22测G16809G7053G8873221G3324不联机下，用示波器（或万用表）测G18339通讯口输出G11352RS232电平。222G3324联机下用示波器（或万用表）测G18339通讯口输出G11352RS232电平。23测G16809G2462G13479G7536G16772G5417G3324”产品硬件测G16809G6265G2590”G1025。3G19202G11436接口31G6363G7643采用IBM微机G7643准芯G19202G11436接口。32测G16809G7053G8873用终端测G16809软件测G16809。33测G16809G2462G13479G7536G16772G5417G3324”产品硬件测G16809G6265G2590”G1025。4G5194行接口41G7643准采用CENTRONICSG7643准化25芯D型G5194行接口。42测G16809G7053G8873采用终端测G16809程序测G16809打印口G11352有G1863控制信号G2656状态信号43测G16809G2462G13479G7536G16772G5417G3324”产品硬件测G16809G6265G2590”G1025。5显示接口51G7643准接CRT显示器显示。52测G16809G7053G8873用终端测G16809程序测G16809，检测终端产品G14033否G3324G6363定时G19400完成屏幕上G11352直观视觉效G7536G2656不同显示G8181G5347G2476换。53测G16809G2462G13479G7536G16772G5417G3324”产品硬件测G16809G6265G2590”G1025。6安全61G7643准收文0505CA214A215A216A217A218A219,A220A221A222A223XXXXXXXX有限公司硬件设计工作流程规范文件编号WIC026附件一STAR5G200G终端硬件测G16809规范G3版G3次G3G20G17G22G3页G3次G3G21G18G21G3611产品G11352安全要求G5224符合GB4943G11352规定。612对地漏电流35MA。613G6251电G5390G5242G5224G14033承受DC2121VG11352电压,持续1MING11352G16809G20576内无击穿或飞弧G10628象62测G16809621安全G16809G20576按GB4943有G1863规定G17839行。622对地漏电流G16809G20576按GB4943G1025G11352当条规定G17839行623G6251电G5390G5242G16809G20576按GB4943G1025苏3条规定G17839行,G3324逐批交收检G20576时,不G17839行预处理7噪声71产品工作时，距产品1M处，噪声不得高于60DBA计权。72测G16809G7053G8873按GB6881规定G17839行，测G16809点距离终端G2520表面1M处，G2474最大值。8电磁兼容G562781G5627G14033无线电干扰限值G5224符合GB9254G1025G11352第41条A级规定82测G16809G7053G8873按GB7813G102557条规定G17839行9电磁敏感G524291G5627G14033按GB68332、GB68236规定G11352G16809G20576要求G17839行,工作G5224正G513292测G16809G7053G8873按GB9813G102557条规定G17839行10环境适G5224G5627101G7643准1011气候环境适G5224G5627G14033按GB9813表1G11352G1120级规定1012机械环境适G5224G5627G14033按GB9813表2、表3、表4、表示G113521级规定,其G1926击波G5430G1038G2334正G5370波G5430102测G16809G7053G8873按GB9813G1025G11352条规定G17839行11G2499G19764G5627111G5627G14033MTBFM1不G1314于5000H112测G16809G7053G8873按GB9818G1025G11352条规定G17839行,其G1025G9213G5242G5224G103820G263,G9213G5242上限值G103840G263,G2499G19764G5627G16809G20576G2656G20576收G16809G20576分G2047采用GB50807表收文0505CA224A225A226A227A228A229,A230A231A232A233XXXXXXXX有限公司硬件设计工作流程规范文件编号WIC026附件G1120STAR510G终端硬件G8181G3371测G16809版次11页次1/3一电源G5627G14033测G168091G6363G7643G14033G3324AC150250V,50HZ下正G5132工作,G17139载G14033力5V,16A12V,320MA12V,220MA2测G16809G7053G887321用交流G16855压器、万用表来G16855输G1849交流电电源电压150250V,以示波器或频率计来测频率501HZ22G16765终端满载工作下,测输出电源电压23用G1563G17139载来测5V、12VG11352G17139载G14033力3测G16809G16772G5417315V输出514V,16A3212V输出131V,320MA3312V输出132V,230MA4G13479G7536电源G8181G3371OKG1120CPUG8181G33711G8181G3371G6363G764311MPUG11352时G19059G7242G1319频率18432MHZ,G12946G52420011212CPUG2520G12193G6363G1208G11352G2163G14033G5627检G76092测G16809G7053G887321G2045用频率计测G7242G1319频率22G2045用测G16809软件G17839行G2520G12193G6363G1208G2163G14033检测3测G16809G16772G541731G7242G1319频率1843202MHZ32G6363G1208测G16809OK4G13479G16782CPU正G5132G989G4396G17154器G8181G33711G6363G764311ROM检测12ROMG16847G1901正确13G6493电G1457G6264G11352检测,备用电G8756电压G30536V,下电后数G6466G13512持电流G7282G173A收文0505CA234A235A236A237A238A239,A240A241A242A243XXXXXXXX有限公司硬件设计工作流程规范文件编号WIC026附件G1120STAR510G终端硬件G8181G3371测G16809版次11页次2/32测G16809G7053G887321用测G16809软件检G7609ROMG11352G3867G1610检G20576G265622用测G16809软件对RAMG2318G17839行G16847G1901检G760923用万用表测备用电G8756G11352电压3测G16809G16772G541731G3867G1610G7669G20576G2656OK32RAMG16847G1901正确33电G8756电压367V,电G8756G13512持电流08G173A4G13479G16782G4396G1660G8181G3371正G5132G3247显示G8181G33711G8181G3371G6363G764311行频315KHZ,G3342频60HZ512视频信号G11352输出波G543013显示正G51322测G16809G7053G887321用频率计测行频,G3342频22用示波器测视频输出信号23G6238VGA视频输出接G2052G7643准G11352VGA显示器,G17828行测G16809软件,检测G14033否G3324G6363定时G19400内完成屏幕上G11352直观视觉效G7536G2656不同显示G8181G5347G11352G2011换3测G16809G16772G541731行频318KHZ,G3342频596HZ32视频信号输出波G5430正确33接CRT后显示正G51324G13479G16782显示G8181G3371正G5132G1128G2721G19095G8181G33711G6363G7643G15574G21495器G2721声G2721G11542测G16809G7053G8873G17839G1849测G16809程序对G15574G21495器测G168093测G16809G16772G5417G2721声正G51324G13479G16782G15574G21495器G8181G3371OKG1857接口G8181G33711G8181G3371G6363G7643收文0505CA244A245A246A247A248A249,A250A251A252A253XXXXXXXX有限公司硬件设计工作流程规范文件编号WIC026附件G1120STAR510G终端硬件G8181G3371测G16809版次11页次3/311G19202G11436输G1849G6207G6563G11733正确12G1030行口通讯接口收G2469正确G2462电平满足EIARS23213G5194行打印口输出、控制正确2测G16809G7053G887321G17839G1849测G16809软件,测G16809G19202G11436G8611个G19202G11352G6207G6563G11733是否正G513222G16765G1030行通讯接口处于自G2469自收状态,检G7609G3324不同通讯状态下波G10317率,7/8G1313数G6466G7053G5347,检G20576G7053G5347是否收G2469正确,G5194用万用表测RS232通讯接口G3324联机通讯G2462G14085机状态下G11352电平23用工G2390自制G11352打印口测G16809G3848检测打印口,有G1863控制信号G2656状态信号G11352正确G56273G16772G541731G2520G19202G11436按G19202输G1849正确32通讯收G2469正确33G14085机下,电平12V联机下,电平8V34打印口测G16809正确4G13479G16782G19202G11436、G1030口、打印口G8181G3371OK收文0505CA254A255A4A5A6A7,A9A10A11A12XXXXXXXX有限公司硬件模块详细设计说明书文件编号产品型号版次页次日期模块名称及功能审核编写0415硬件模块调试报告产品硬件测试报告产品名称编号模块名称页次日期审核拟制XXXXXXXX有限公司0416XXXXXXXX有限公司产品硬件设计规范文件编号WIC026硬件系统设计原则版次10页次1/2G20G17系统G6205G4649G2656G18209G13634设计G5224G17993G5502以下原则G3G20G17G20G4625G2499G14033G17885G6333G1868型电G17347G1038硬件系统G11352G7643准化、G8181G3371化打下G14403G3921G3534G11796。G3G20G17G21系统G11352G6205G4649G994外G3272设备G11352G18209G13634G11352G8712平G5224满足G5224用G2163G14033G19668要，G5194G11053有适当G11352G1325地以G1427G1120次G5332G2469。G3G20G17G22硬件G13479构G5224G13479合G5224用软件G7053G7708一G5194G13783G15397，G13783G15397G11352原则是软件G14033G4466G10628G11352G2163G14033G4625G2499G14033G11013软件G4466G10628，以G12628化硬件G13479构、G19489G1314成本、提高G9801G8975G5627G2462适G5224G5627，G1306须注G5859G11013软件G4466G10628G11352硬件G2163G14033，其G2721G5224时G19400要G8616直接用硬件G4466G10628G19283，G1000G2356用G38G51G56时G19400，G6164以G5224G7693G6466系统G4466G19481要求G2022分软、硬件G2163G14033G11352G8616G1375。G3G20G17G23整个系统G11468G1863器件要G4625G2499G14033G1582G2052G5627G14033G2317G18209，G17907G5242G2317G18209时G19059G17751高时G4396G17154器G5224G17885G4396G2474G17907G5242G17751高G11352芯G10267。G17885G6333G38G48G50SG3G38G51G56芯G10267构成G1314G2163G13803G11352系统时，系统G1025G11352G6164有芯G10267G18129G5224G17885G6333G1314G2163G13803G11352器件，电平G2317G18209输出TTG47G256G20G257电平是G21G17G23G975G57输出，G2560G257电平是0G970G17G23G89G727输G1849G38G48G50SG3“G20”电平是G23G17G28G28G89G975G89，输G1849G2560G257电平是0G970G170G20G89。G3926G7536G38G48G50S器件接受TTG47G11352输出，其输G1849端G5224要加电平G17728换器或上G6301电G19471，否则G38G48G50S器件G1262处于不确定状态。G3G20G175G2499G19764G5627G2462G6251干扰设计是硬件系统不G2499G13582G2499G11352一部分，G4439G2265G6336芯G10267，器件G17885G6333、G2447G9400波印G2059板布线、通G17959G19560离、电源设计G12573。G3G20G17G25外接电G17347G17751G3822时须G13783G15397G20549动G14033力，G3926G7536要G20549动G7368G18337G11352G17139载，G2345G2533G1268输时要G6205G4649G26G23G47SG3G21G23G23总线G20549动器，G2464G2533G1268输时要G6205G4649G26G23G38SG3G21G235G20549动器。G3G20G17G26要G17885G6333G7643准化以G2462G6251G6451G5627G3921G11352器件或电G17347，对器件要G17839行G12591G17885。G3G20G178G38G48G50S电G17347不用G11352输G1849端不允许浮空，不然G1262出G10628G17935G17765电平不确定G2656容易接受外噪声干扰，产生误动作，有时易使栅极感G5224静电造成栅极击穿，因此G3822G1325G11352输G1849端G5224G7693G6466G1867G1319情况G994正电源或地G11468连接，也G2499G994其G4439输G1849端连接。G3G3G3A13A14A14A15A150505CA1A2A0A3A8A16,A17A18A19A20XXXXXXXX有限公司产品硬件设计规范文件编号WIC026硬件系统设计原则版次10页次2/2G21G17G38G51G56G17885G6333原则G2656建议G3G3G3G3G3G3G3一个计算机G5224用系统，首G1820面临G38G51G56G11352G17885型问题，一G14336G2499作G3926下G13783G15397。G3G21G17G20G4625G18339G17885G6333G994公司熟悉G11352G38G51G56G3G17751G11468近G11352芯G10267，G17885G6333技术上G1820G17839G11352高G5627G14033G38G51G56，G2499以G1038以后G11352产品G2469G4649提供G17751G3921G11352G10301质G3534G11796G2656条件。这样G11352原则G3926G7536被绝对化，G13479G7536往往就事G994愿违。其一是因G1038G5627G14033G3921G11352芯G10267对不熟悉G11352人来G16840，G18129只G14033是潜G3324G11352G5627G14033，一个人不G2499G14033什么机型G11352G6363G1208、系统G18129学G727其G1120是因G1038随着集成电G17347技术G11352G2469G4649，G38G51G56芯G10267G5627G14033不断提高，G2469G4649极快，G6164以芯G10267层出不穷，G6164以G5224该G1457持一定G11352时G19400稳定G5627，轻易不要改G2476G38G51G56。G3G21G17G21G38G51G56G14033满足G5224用要求就行不要盲目追求G5627G14033。G5224G7693G6466G4466G19481产品G11352G10317点G2462要求确定G38G51G56，G5627G14033造价G17819G1314G1262给系统带来麻烦，甚至不G14033满足G5224用要求。G1306字G19283G1313数G2656G5627G14033造价G17819高，G2499G14033造成大材小用，有G11352还G1262引出问题、系统复杂化。G3G21G17G22G6164G17885G38G51G56芯G10267G5224要有成熟G11352G5332G2469系统G2656稳定G11352货源，丰富G11352G5224用软件支持，G3926G7536用流行普遍使用G11352芯G10267，资料丰富，G1427于交流。G3G21G17G23G5224G18339G17885G6333集成G5242高G38G51G56，G14033G6238外G3272控制电G17347集成G3324芯G10267内G2499G19489G1314系统G11352复杂G5627，提高系统G2499G19764G5627。G3G3G3G3收文_0505CA21A22A23A24A25A26,A27A28A29A30XXXXXXXX有限公司产品硬件设计规范文件编号WIC026电源设计规范版次10页次1/2G20G17输G1849条件G3G14521系统要求输G1849G1038交流电网，则电源就要G13783G15397G6164G14033适G5224G11352电网电压范G3272，电网频率。世界电网电压有G3921几G12193G2000G57、G21G210G57、G21G230G57、G2280G57G12573G12573，G3324一G14336情况下是不G14033兼容G11352，G3926G7536误用轻则烧G1457险管、电源，G18337则烧坏整个系统。电网G11352频率一G14336有50HZ、G250HZ或G10317殊G3342合G11352G2300HZ，频率G11352差异对电源内部G11352整流器有一定影G2721。一G14336是频率越高，整流器就容易G2469热，对于频率很高G11352G3342合，就要求用快恢复G1120极管G2462高频铝电G16311来构成整流G9400波电G17347。对于G7588一电网电压，G8616G3926G7643你值G1038G21G210G57G11352国家或地G2318，其电压有G2499G14033G3324G20G26G21G57G2052G2150G57之G19400G2476动，这时就要求电源G14033G3324宽G11352电网电压范G3272内工作。G3324一些G10317定G11352G3342合，系统G11352输G1849要求G1038直流输G1849，G8616G3926汽车电器、电信局系统G12573，这要G13783G15397系统G11352电源输G1849极G5627，电压值大小G994供电母线是否G2317G18209。G3G21G17系统内部对电源G11352要求G3系统对电源G11352电压要求是最G3534本G11352要求。这时电源要针对系统对电压G11352偏差允许范G3272，G2462其因G17139载G2476化引起G11352电流G2476化造成电源G11352电压波动即G17139载G16855整率，电网电压G2476化影G2721电源输出电压G11352波动即电网G16855整率来G17885G6333电源输出电压，使得该电压G11352波动限制G3324系统对供电电压偏差允许G11352范G3272之内。系统对电源输出电流大小G11352要求是G17885G6333电源最G18337要G11352条件之一。G13783核电源G11352输出电流G14033力有两G20045G6363G7643，G3即持续输出电流G2656峰值电流输出大小。一G14336G11352线G5627稳压电G17347G3926G26805，其持续输出G14033力G1038G20G170A，其峰值输出G14033力G2499达近G21G170A。G14521系统G11352工作电流G1038G20A，短时G19400内G3926一两秒或一两分G19059达G2052G21A，就G2499G17885用持续输出G1038G20A，峰值输出G1038G21AG11352电源。G3G22G17系统对电源G11352G1319积、G18337G18339、G9213升G11352要求G3系统对电源G11352G1319积、G18337G18339、G9213升G11352要求也G2499以G16840系统对电源G11352工作G7053G5347G11352要求，电源G11352工作G7053G5347分G1038G5332G1863G7053G5347G2656线G5627G7053G5347两G12193G5332G1863G7053G5347G11352电源表G3G3收文_0505CA31A32A33A34A35A36,A37A38A39A40XXXXXXXX有限公司产品硬件设计规范文件编号WIC026电源设计规范版次10页次2/2G3G3G3G3G3G10628G1038输G1849G994输出几乎G12573G2163率扣除其G6451G13803，G2499以直接G11013电网整流G5430成G11352直流电压产生G11468G5224G11352输出电压。G5332G1863G7053G5347G11352电源电网适G5224G14033力G5390、效率高、整G1319G1319积小、G18337G18339轻、整G1319G9213升小，G1306电G17347复杂，造价昂贵。线G5627G7053G5347输G1849G994输出G1038G12573电流，不象G5332G1863G7053G5347输G1849G994输出G1038G12573G2163率，G6164以线G5627G7053G5347G11352输G1849输出压差越大，G6451G13803G3324稳压器上G11352G2163率就越G3822，则效率就越G1314，G9213升就越高。因此要求提高线G5627电源G11352效率就要G19489G1314输G1849G994输出之G19400G11352电压差，G6164以线G5627G7053G5347就不G2499避免地使用一个G1319积大、笨G18337G11352工频电源G2476压器，使得输G1849电压G14033兼顾效率G994电网G11352电压波动。G6164以线G5627G7053G5347G11352电源就表G10628得G3G18337G18339G18337、G1319积大、效率G1314、电网适G5224G14033力差、G9213升高、要求散热G11352空G19400也大。G1306线引G5627电源电G17347G12628G2345、电压稳定、纹波G2499以G1582得小、G3辐射也小，一G14336G18129有G10628成G11352IG38，G6164以造价G1314廉。G3G22G17系统对电源G11352成本要求。G3系统对电源G11352成本要求了也决定了电源对工作G7053G5347G11352要求，总G11352来G16840线G5627工作G11352电源G17751G1427宜，G5332G1863电源G17751贵。只要是系统要求电源G11352纹波不是G10317G2047小，就G4625G2499G14033G11352G17885用G5332G1863型G11352电源。G17885用G5332G1863型电源使用整个系统G11352G1319积减小、G9213升G19489G1314、G2499G19764G5627提高，增加了一点成本是值得G11352。G3G3G3收文_0505CA41A42A43A44A45A46,A47A48A49A50XXXXXXXX有限公司产品硬件设计规范文件编号WIC026EMC设计规范版次10页次1/3G3G20G17G3324电磁G8757G7591越来越G1017G18337、电磁波资源日G11422G7555G9224G11352G1182G3837，人G1216对电G4388产品G11352电磁兼容G5627G40G48G38G6363G7643越来越G18337视，G3324G2325几G20045G40G48G38G6363G7643G1025G15最G18337要G11352也最G3534本两G20045是G1268导干扰G994辐射干扰。G3G21G17G1268导干扰G2462G6245制G6526G7057G3G21G17G20G1268导干扰G11352频率大G14280G1038G2000G46HZG97G220G48HZ，而G1000不同G11352G7643准定G1053G11352频率范G3272不一样。G6117G1216国家采用G11352G7643准G994G41G38G38G7643准G11468G1296。G1268导干扰是G6363干扰信号通G17819G20316电线对G5078电电网G11352干扰。G11013于绝大部分G11352电器、G1214表G18129直接G994电网G11468连接，G6245制G1268导干扰G5859G1053G3324于减小这G1214表电器对电网G11352G8757G7591，G19462G8502干扰信号通G17819电网这个公G1861G17896G5464对其G1194电G4388设备G11352干扰。G3G21G17G21G1268导干扰是电网上G11352高频G17139载引起G11352，这些G17139载是高频工作G11352G5332G1863电源、高频信号源、高频加热器G12573G12573。这些G17139载往往G1262产生G14045G1926G5347G11352大电流，这些电流通G17819大G11352电流环G17347，产生了一些G9400波电G17347无G8873G9400除G11352G1861G8181噪声，而G1000噪声G1025G2265G2559了丰富G11352高次G16868波。G3G21G17G22G6245制G1268导干扰最G5132用G11352G7053G8873是G3324电网G20316电G3250G17347G1025G6566G1849G1861G8181G9400波器，G1861G8181G9400波器（G3926图G20G6164示）G11013G38G20、G38G21、G38G22G994G37G20G13464成，G38G20G1038安全G7643准件，G2474值G33240G170G23G26G88G410G17G23G26G88G41之G19400，G13796压G1038AG38G2150G57，G15192G14192电容，G1039要是G9400除差G8181噪声。G37G20是G13481G3324同一磁G17347上G11352两G13464线G3292，电感G18339G3324G20G21G80HG9750G80H之G19400，磁G5627材料G1038一G14336G11352G19093G8699G1319软磁材料。G38G21G2462G38G22也是安全G7643准件，G2474值G3324G20000G51G41G23G2600G51G41之G19400，G13796压G1038AG38G2150G57，G19530G10955G1183质G11352电容，起G2052G6245制G1861G8181噪声G11352作用。G3G3G3G3G3G3G3G3G3G3G3G3G3G3G3G3G3图1A51A52A53A54A55A56A51A56。A57A57A58A59A60A61G3G3收文_0505CA62A63A64A65A66A67,A68A69A70A71XXXXXXXX有限公司产品硬件设计规范文件编号WIC026EMC设计规范版次10页次2/33辐射干扰及其抗干扰措施31辐射干扰的频率范围为30MH1GHZ之间，辐射是高频信号源通过布线向空间辐射电磁谐波能量。这些不受控制的电磁波辐射会影响正常的无线电通信，例如干扰收音机、电视机、无线电话、等设备。32辐射干扰是超高频信号通过布线作为发射天线向外辐射无用电磁能量，因此尽可能缩小可被利用的布线尺寸，就有利于降低辐射干扰。方法一净化电源线。由于电源线是一切信号源的能量供给线，故电源上被污染的可能性最大，并且电源线尺寸大且长，处理不好，辐射就很容易把电源线作为干扰出口通道。要净化电源线，就必须在电源布线的恬当G1313G13634G2164G1849G9400波电容。这些电容要G8726高频G10317性好，尺寸小，G1427于G19764G17