【成功案例】LITTELFUSE 0201封装TVS实现家庭网关ESD防护相关设计经验

2018-07-31 世强
TVS,SP1027,SP1027-01YTG,Littelfuse TVS,SP1027,SP1027-01YTG,Littelfuse TVS,SP1027,SP1027-01YTG,Littelfuse TVS,SP1027,SP1027-01YTG,Littelfuse

众所周知,现在消费者对产品可靠性要求越来越高,高端家庭网关设备对雷击、静电干扰要求越来越高,这样也是有效保障产品质量,防护与网关相连接的设备。因此电信对高端家庭网关设备的浪涌等级由差模0.5KV,共模1KV提高到差模1KV,共模3KV,对于此前的要求,无需外加防护都能够顺利通过,对于新的要求,再无防护情况是无法通过,我们当然寻求防护龙头企业力特的帮助。


根据需求选取了TVSSP1027-01YTG,能够抗击ESD:IEC6000-4-2的静电放电,接触14KV,空气25KV;EFT,IEC61000-4-4,40A(5/50ns);浪涌,2A(8/20us),并且我们将这颗芯片设计到电路中,SP1027-01YTG具有小尺寸0201封装,很省空间,具有优异的防护性能,SP1027-01YTG电路原理图如图1所示,设计的PCB如图2所示。


图1  SP1027-01YTG电路原理图


图2 SP1027 PCB图

 

我们将设计好的板子进行了EMC测试,板卡设计层数为2层,TVS防护主要为差模防护,在网络变压器后端的每对差分线并联一颗TVS管,能对整机的浪涌,EFT,静电进行有效的防护,并对整机进行浪涌,EFT,静电的测试,测试结果如图3:



测试项目

测试方法

测试结论

静电

空气放电:±8KV                                                    

接触放电:±4KV

对机箱面板人手容易接触部分施加指定放电电压,观察DUT的工作状况。

 

 

通过

浪涌

电平:差模±1KV,共模±3KV;                              

试验脉冲次数:正负各5次;

脉冲间隔时间:30s

施加在电源处,观察DUT的工作状态。

 

通过

EFT

电平:±1KV(电源回路);干扰信号重复频率:5KHZ,

干扰信号持续时间:正负极性各120s

 

通过

 图3  整机测试结果


同时我们对差分信号的眼图进行测量,如果处理不好会对信号质量有很大影响,我们对槟城BV03C和SP1027-01YTG进行比较测试。测试结果发现槟城BV03C的眼图很差,不符合要求,SP1027效果很好,如图4所示。


图4 上图为国内厂家测试测出的眼图, 图下为SP1027-01YTG测出的眼图。


综上所示,

LITTELFUSE的SP1027-01YTG能够满足测试需求,具有小体积,防护高,可靠性的优势,能够满足高端家庭网关的防护需求。

在防护设计的时候需要注意:

1.  两层板卡设计的时候需要注意防护器件的选择,由于板卡比较密集,需要选取小尺寸,高防护电压器件,低结电容;

2.  两层板设计,需要差分线要有包地设计,尽量保证走线层有完整参考地平面;

3.  防护器件应该靠近接口处放置,这样干扰来以后能够快速泄放,防护器件的走线路径越短越好;

4.  电路设计时,应该有比较好的阻抗匹配,该有的阻容匹配不能省略;

5.  力特作为龙头的防护厂家,器件有很好的防护性能,能够满足网络端口防护需求。


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  • 窝在家里好舒服 Lv5. 技术专家 2019-03-30
    学习一下
  • wch7475 Lv8. 研究员 2019-03-28
    学习
  • wylfdx Lv6. 高级专家 2018-12-27
    学习了
  • 小小的 Lv6. 高级专家 2018-12-20
    方案很好,值得学习和收藏
  • 小人物的春天 Lv6. 高级专家 2018-12-19
    学习
  • 红绿蓝 Lv4. 资深工程师 2018-12-10
    学习了
  • 开哥哥 Lv7. 资深专家 2018-12-08
    不错
  • 用户14437954 Lv4. 资深工程师 2018-12-05
    继续关注
  • 深蓝色 Lv7. 资深专家 2018-12-04
    很好,不错
  • 用户86910647 Lv5. 技术专家 2018-12-02
    不错
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目录- Company profile    Circuit Protection Technologies    Overcurrent/Overvoltage Protection device    ESD Suppression Solutions    Overcurrent Protection/Overvoltage Protection Applications    Common Circuit Threatsand Protection Solutions    Fuses    Fuse Holders    PPTC Devices    Varistors    Gas Discharge Tubes    ESD Suppressors    TVS Diode Arrays    Protection Ics    TVS Diodes    PLED Bypass Protectors    SIDACtor® Protection Thyristors    Circuit Breakers   

型号- PXXX0SAMC,LS2406ERQ23,1812L,LVR,SPHV,30KPA-HR,456SE,456SD,15KPA,345 SERIES,ITV9550 30A,AQ24CANFD,SDP,AC,RUEF110S,LS2406ERQ33,PXXX2AC,MICROSMDCH,562 SERIES,AQ1003-01ETG,SDPXXX0T023G5,150603,800,801,802,804,806,807,BA,808,BB,PGB2,PGB1,P4SMA,TSM600,PTF070,MICROASMD,SC1103C-01UTG,PTF078,PTF077,LS0504EVT233,PTF075,AQXXC-01LTG,810,811,356 SERIES,5KP,813,FB65,814,FB66,CA,CG,CH,PTF080,286677,PICOASMDCH,PXXX2AX,MINIASMDC,SMF4L,121004,B61089BDR,282008,121001,282007,820,121003,AK10-Y,821,121002,282002,823,824,282001,FB55,DA,828,DB,FB58,NANOASMDCH,820-20,830,831,834,835,TP5KP,101001,3453,3452,605,606,RKEF,607,PXXX2ACMC,LS12052BD33,AGRF,PTF0080M,B61089QDR,RUEF135V,850,851,852,3455,853,AHEF100,60R,617,618,GTCX36-XXXM-R05,PXXX0Q12X,860,862,HA,HB34,GTCX36-XXXM-R10,2920L,SP8008,AQ4337-01ETG,155 SERIES,P6SMB,803-01 SERIES,SLD,810 SERIES,870,PTF015,874,875,876,342 SERIES,877,5.0SMDJXXS-HRA,348 SERIES,30KPA,SM7,SM24CANB,SMCG-HR,TSV250,FC09B1606NL-0,SMD,SMF,TPSMB-VR,881,35408 SERIES,OMN002,400,OMN004,885,35406 SERIES,881 SERIES,OMN006,646,405,647,V20H275AUTO,407,649,RXEF,101010,52100001009,AQ24CANA,AQHVXX-01LTG,656,101002,PXXXXDF,658,101003,5KPA-HR,824-20 SERIES,5.0SMDJ,570 SERIES,AQ3530-01FTG,B-SERIES,662,663,422,664,665,LA,SMBLCE-HR,L-SERIES,AQHVXX-01LTG-C,PTF050,SC1105-01UTG,PTF055,G-SERIES,435,437,438,A-SERIES,870 SERIES,PTF065,440,RGEF,437A,441,SP1103C,443,202,203,254 121,445,446,688,447,3453 SERIES,448,449,208,209,TR600,04450001,PTF030,438A,451,SRP,452,453,454,TSM250,PTF035,213,456,215,821 SERIES,458,216,LV ULTRAMOV,459,217,218,SP3401,SP3400,AQ3522-01FTG,TPSMC,FHN26G2,TPSMB,PTF040,TPSMD,LS2405IDD23,PTF045,460,461,5KPA-HRA,462,220,464,465,466,224,467,225,576 SERIES,468,254 101,229,BXXX0CX,SL0902A,102080,470,BXXX1UX,471,472,230,473,232,233,501A,476,234,235,477,MIDSMD,PXXX4UCMC,239,MHS,850 SERIES,813 SERIES,AQ1205-01ETG,483,RA,485,487,802 SERIES,259UL913,ITV4030 22A,SM20,345121,102064,254 201 - 208,251,494,PLEDXUX,253,SD,SE,SG,SH,259,4.0SMDJ,SL1002A,SM,15KPA-HRA,15KPA-HR,GTCX37-XXXM-R10,102074,102076,102079,102078,NANOSMDCH,GTCA28-XXXM-R03,NY61AP,262,102071,263,265,266,3.0SMC,267,DSLP,268,269,LOW RHOPTC,520 002,520 003,520 004,SL1003A,520 005,1KSMB,345101,MLA,LS24062RQ23,1210L,AQ36CANA-02HTG,445073,MLE,MHP-TAM15,272,273,MLN,M-SERIES,274,E-SERIES,275,278,279,AQ3102-02HTG,MHP-TAC6,803-01,MHP-TA,285,AQ3041,SMBLCE-HRA,PLEDXUSXA,SP4322-01ETG,AQ3045,TP1.5KE,SP4208,SC1205-01ETG,820-20 SERIES,354 SERIES,CG33.0L,SP11XX,359 SERIES,MS-SERIES,111 SERIES,100 SERIES,NANOSMDC,346877,PICOASMDCH010F-2,340 SERIES,AHRF300,AHEF,342025,342024,342021,ZA,AQ3400,XGD,FH604,AQ1250-01ETG,PXXX3ACMC,FH602,PXXX6U,SP4010,342006,PLEDXN,SZD200,HG34,PLEDXS-A,J-SERIES,824 SERIES,FEMTOASMDC,ITV5432 30A,AK6-Y,557 SERIES,SL1021A,SL1021B,SP4020,SP4022,SP4021,SMDCH,SP4024,281010,SP4023,PLED,MINISMDC,AXXXXUX6,254 011 - 008,SMTAK3,PXXX0Q22XLH,MHP-TAM6,AK15,445005,281007,154T,281008,281005,AK10,AQ1005,51800001009,PXXXXS4X,ITMOV,354701 SERIES,483A,445004,LS05006VPQ33,SP4044,BXXX1UC4,SP4045,5200001,SMBJ,AQXX-01LTG,AQ7538-08UTG,SP1064E-04UTG,TCF250,SMTOAK2,SMAJ,AQ7520-08UTG,PXXX3AX,NANOASMDC,461E,811 SERIES,800 SERIES,157T,FC51,PXXX1U,PXXX1S,TRF250,SMBJ-HRA,SMDJ,CG3,SP3384NUTG,CG2,CG5,CG4,2205,CG7,B3XX4UX,CG6,VLP,VLR,0603L,PLEDXUX-A,SMCJ,PICOASMDC,LS0504EDD12,SMD2,PXXX0Q22C,GTCX35-XXXM-R05,SMDJ-HR,SMDC,TMOV34S,AHRF,440A,AXGD10603NR,K-SERIES,TPSMC-VR,H-SERIES,SZ1SMB,SZ1SMC,SZ1SMA,219XA,AK20-Y,ITV9550L2030MR,441A,SZ1.5SMC,SP1250-01ETG,C-SERIES,SC1210-01ETG,TB-SERIES,0402L,ITV9550 45A,AHRL,DHB34,FHN26W,AUML,TP6KE,LTKAK3,AQRV05-4HTG,LTKAK2,72R,977,TLP,LTKAK6,AQ15CANA-02HTG,PXXX3AC,SP3205-01ETG,501,3452 SERIES,504,505,506,507,GTCX23-XXXM-R01,508,8.0SMDJ,PXXX3U,100060,100061,100062,122090,100063,100064,100065,PXXX0SX,100066,SC1533-01LTG,SPHV-C,AHS,122093,150318,TS600,150319,150316,150317,150315,AQ3102-02JTG,150312,513,514,100058,100059,2016L,286377,122088,122087,559 SERIES,122083,GTCX26-XXXM-R05,521,523,AK15-Y,100067,526,150322,527,PXXX2SXLH,SL1411A,AK1,AK3,AK6,VTP,422A,SMCJ-HRA,ASMD,C-III,SR70,0805L,860 SERIES,RHEF,SMF3.3,303,304,305,308,35409,35408,35407,35406,TPSMA6L,PXXX2SX,SP724,SP725,SC1115-01UTG,TSL250,LOW RHO,HMOV,SP723,SP720,SP721,312,313,30R,314,556,315,557,559,318,SLD6S,SP1305,SP712,560,562,322,564,324,325,326,328,SLD5S,CX-SERIES,570,571,332,SLD8S,PXXX0SD,576,TRF600,PICOSMDC,3.0SMCJ,SZSMF,LS1205EVD33,SP1326,AQ12CANA-02HTG,340,150307,100,342,FHN20G,344,345,35407 SERIES,348,SMAJ-HRA,150300,AUMOV,LTKAK10,445 SERIES,SC1333-01ETG,RUEF,GTCX25-XXXM-R02,GTCX25-XXXM-R05,LS0502SCD33,111,354,356,52000001009,359,824-20,SP3420,150274,RUSBF,SP1003,SP3422,PXXX0ME,564 SERIES,SP2555NUTG,51900001009,10207101009,520 101,369,SL1122A,571 SERIES,SP1233,AQ2555NUTG,SP1255P,600R,PXXX4UX,WB07B0606LG,370,372,1.5SMC,TLPA,373,1.5SMB,374,SZSMF4L,377,820 SERIES,254 131,PXXX1CX2,SEPXXXXQ38,00300210,SZW200,TP5.0SMDJ,523 SERIES,SP1005,SP1006,CG32.0L,382,AQ1205-01FTG,383,385,35409 SERIES,407A,V14H460AUTO,SMA6L,391,392,CG32.5L,N-SERIES,SMA6J,395,3425L,F-SERIES,154,396,397,398,157,399,159,SC1122-01UT

选型指南  -  LITTELFUSE  - v0420  - 0420 PDF 英文 下载

【选型】Littelfuse(力特)TVS二极管(瞬态电压抑制二极管)选型指南

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型号- LCE9.0A,1.5SMC540CA,SMCJ36CA,SA13CA,P4SMA16A,SMAJ6.0CA,30KPA45A,5KPXXX,SMAJ40CA,SMDJ12A,SMDJ43CA,SMBJ51A,5KP200A,30KPA170CA,P6SMB56A,LCE22A,SMDJ13A,20KPA26CA,P6KE22A,5.0SMDJ170A,P6KE24A,SMDJ78CA,SMDJ11A,30KPA280A,SMF26A,1.5SMC13CA,SA43A,SMCJ14CA,P4KE13CA,5KP75A,SMCJ78A,30KPA300CA,P4SMA530CA,P4SMA18A,SMDJ10A,P6KE18CA,5.0SMDJ85A,5KP78A,AK10-530C,LCE24A,P4SMA16CA,SMCJ100CA,30KPA48A,20KPA48CA,5KP,5KP28CA,P6KE20A,SMBJ300A,5KP30A,SMBJ150CA,1.5KE150A,P4SMA91CA,SMDJ170A,30KPA45CA,SMAJ70A,SA7.0CA,SMAJ75CA,AK3 - 430C,1KSMB9.1A,SMF24A,SMA6L9.0A,SMBJ16CA,SMA6JXXA,3.0SMC30A,SMA6JXXX,SMDJ58A,P6SMB170CA,SA45A,1.5KE220CA,SA48CA,SMCJ30A,P6KE540A,3KP36CA,5.0SMDJ12CA,P6KE27A,SA180A,P6SMB51A,1KSMB160CA,SMA6J5.0A,SA40A,RS232,SMCJ75A,SMA6L40A,SA22CA,P6KEXXXXXX,P6KE8.2CA,1KSMB27A,SMAJ100A,P4SMA300A,SMF22A,3KP100CA,30KPA42A,SMDJ30CA,P6SMB250A,P4SMA160CA,1.5SMC400A,1KSMB130A,P4KE130CA,P4KE180A,5.0SMDJ170CA,SA110CA,30KPA54CA,P4SMA82CA,P4KE250CA,15KPA75CA,30KPA150A,SMDJ54A,30KPA43A,3.0SMC33A,30KPA198A,AK6-170C,SMDJ160CA,1.5KE7.5A,20KPA180A,3KP14CA,SMA6L85A,SMBJ400CA,P6SMB120A,LCE20A,P6SMB51CA,3KP220CA,P4KE22CA,1.5SMC300CA,AK3-058C,P6SMB300CA,SMCJ220CA,SMF20A,15KPA40CA,1.5SMC530A,P6SMB8.2A,15KPA70A,5KP15CA,1.5KE51A,1KSMB30CA,P6KE100A,1.5SMC39CA,P4SMA56A,P6SMB,V33ZA70PX,P6SMB540CA,1.5KE36CA,SA70CA,SLD,15KPA75A,P6KE36CA,15KPA100A,5KP36A,P6SMB16A,P6SMB300A,20KPA280CA,1KSMB22A,30KPA,5KP200CA,1KSMB43CA,5.0SMDJ130A,SMAJ18CA,SA17CA,1.5KE170CA,20KPA56A,5KP90CA,3KP24A,SMF,SMDJ51A,3KP45CA,5KP190CA,P4SMA170A,04611.25ER,1.5SMC47A,P6SMB15A,SMAJ250CA,SMCJ18CA,P4SMA10A,3KP58CA,1.5KE56A,20KPA160CA,3KP190A,5.0SMDJ30CA,1.5SMC440A,SMDJ120CA,P6SMB91CA,AK10 - 170C,1.5SMC170CA,LCE64A,P4SMA12CA,SA5.0CA,1KSMB24A,P4SMA480CA,5KP24CA,P6SMB16CA,P4SMA11A,3KP22A,SMBJ90A,SMBJ12CA,P4KE530A,SAC8.0,P6SMB13A,SMAJ130CA,SMBJ350CA,SMCJ70A,SAC8.5,SMBJ5.0A,SA48A,P4SMA12A,P4KE39CA,1.5SMC220A,SMCJ100A,P6SMB12A,1.5KE10A,20KPA52A,P4SMA13A,AK6 - 430C,P6KE180CA,P6KE510CA,SMBJ2SCA,P6SMB10A,3KP28A,3.0SMCXXA,5KP7.5CA,1KSMB170A,P4SMA47CA,P6SMB11A,SLD28-018,1KSMB56CA,SMDJ5.0A,SA26CA,30KPA58CA,P6SMB100CA,5.0SMDJ78CA,3KP10CA,1.5KE12A,15KPA18CA,15KPAXXX,P4KE400A,AK15 - 058C,P6SMB58A,SMBJ170A,1.5KE10CA,AK3 - 030C,LCE60A,1KSMB68A,1KSMB20A,P4KEXXXXX,5.0SMDJ43CA,P4SMA15A,1.5KE11A,P6KE,30KPA144CA,15KPA30A,3KP26A,SMA6L5.0A,SMDJ12CA,15KPA78A,30KPA84A,P6KE27CA,5KP33A,P6SMB82CA,15KPA180CA,AK3 - 380C,1KSMB6.8CA,5KP11CA,30KPA36CA,SMBJ5.0CA,20KPA52CA,P4KE6.8CA,P6SMB47CA,SA150CA,1.5SMC250CA,P4SMA480A,P6SMB220CA,SLD17-018,1.5KE540A,1KSMB62A,SMCJ85CA,15KPA26CA,P4SMA130A,15KPA24A,30KPA90A,3KP64A,AK3 - 076C,SLD33-018,P4KE20A,1.5SMC51A,SMBJ78CA,20KPA60A,P4KE68A,SMAJ48CA,SMBJ43CA,5KP33CA,AK15 - 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430C,5.0SMDJ33A,SMCJ150A,20KPA172A,P6KE6.8A,SMBJ58A,1.5KEXXXXX,5KP70A,SA6.0A,P6SMB30CA,5KP8.5A,SMAJ78A,SLD13U-017,SMAJ30A,5KP120A,5.0SMDJ26CA,SMBJ10A,SMDJ18A,SMBJ11A,5KP51CA,P4KE27A,SMAJ22CA,SMBJ220A,SMCJ6.5CA,SMAJ75A,SMCJ36A,SMAJ100CA,SMDJ60CA,5.0SMDJ75A,LCE26A,P4SMA9.1A,SMDJ17A,SMBJ7.5CA,P4SMA91A,1.5KE100A,P6SMB170A,P6KE30A,3KPXXXXXX,SMCJ45CA,3KP60A,1.5SMC180A,30KPA84CA,SMA6L48A,SMF7.0A,P6KE75CA,P4KE24A,3KP180CA,SMDJ16A,AK10-058C,SMAJ6.5A,SMBJ440A,20KPA30CA,SMCJ10CA,P6KEXXX,SMCJ58CA,SMDJ7.5CA,3KP18CA,SMA6L45A,SMAJ6.5CA,SMBJ200CA,LCE28A,5KP210A,5.0SMDJ17CA,1.5KE18CA,SMDJXXXXX-T7,5KP60CA,P4KE160CA,SMDJ15A,5.0SMDJ70CA,1.5KE320A,SMCJ33A,1.5KE8.2CA,P4SMA350A,P6SMB56CA,AK6 - 076C,P4KE22A,SMBJ54A,P4SMA6.8CA,SMF28A,SMDJ14A,SMDJ8.5A,30KPA216CA,1KSMB130CA,P4KE75CA,P4KE6.8A,1.5KE91A,SA6.5A,5.0SMDJ33CA,SA36CA,AK3-150C,SMBJ,P4SMA9.1CA,P6KE170CA,SMDJ20CA,15KPA30CA,SMF6.0A,15KPA170CA,P4SMA15CA,1.5KE160A,LCE58A,P6SMB68A,SMA6L8.5A,LCE10A,P6SMB110A,30KPA58A,1KSMB9.1CA,P4SMA7.5CA,SMAJ7.5A,3KP6.0CA,5KP64A,SMDJ160A,3KP26CA,SMAJ60A,SMAJ,P4SMA510A,P6KE36A,SMBJ40A,5.0SMDJ70A,1.5KE550CA,LCE11A,SMDJ48A,1.5KE20CA,1KSMB7.5CA,SMCJ7.0CA,SMCJ20A,P4KE3

选型指南  -  LITTELFUSE PDF 中文 下载

通信芯片防护:如何选择合适的TVS TSS器件?

TVS和TSS作为典型的电路保护器件,能够为通信芯片提供必要的保护。本文将探讨如何选择适合的TVS和TSS器件,为系统设计提供可靠的解决方案。

技术探讨    发布时间 : 2024-08-29

【技术大神】小谈USB Type C接口的ESD保护方案

本文分析了ESD故障的三种类型,并以实际的案例总结了工业类产品选择ESD器件的原则和注意事项。

器件选型    发布时间 : 2017-02-09

【选型】RS485通信口实现共模4KV,差模2KV防护设计如何选型?

本文将分享笔者近期刚完成的对RS485通信口实现共模4KV,差模2KV(IEC61000-4-5 Level 4)的防护设计。在该设计中,笔者选用了Littelfuse的系列防护器件,包含GDT(气体放电管)、PTC(自恢复保险丝)、TVS(瞬态电压抑制二极管)。

器件选型    发布时间 : 2020-12-24

Chargers for consumer electronics (10 to 240 W)

型号- P6SMB,SMBJ,SPHV24,SETP0805-100-CC,373,1.5SMB,LS SERIES,CPC1301,435,218,MBR,SP3522,DST,P6KE,SMCJ,443E,SMF,0402SFF,SMF4L,TE,438GT,LA,8.0SMDJ,TR,DXX15L

应用及方案  -  LITTELFUSE  - REV0923  - 0923 PDF 英文 下载

【产品】防雷击的TVS二极管,保障CAN总线通信安全

内含两个双向TVS管,泄露电流低至0.1uA,钳位电压极低。

新产品    发布时间 : 2017-03-07

【选型】汽车电子功能模块抛负载保护TVS、MOV选型

随着汽车成为大众消费品进入千家万户,无论是传统车辆还是新能源PHEV,车辆的长期安全可靠性成为衡量汽车品质的一个重要指标。而保证汽车安全可靠,除了在汽车电子元器件的车规级的认证选型上需要关注之外,对于汽车电子功能模块的保护也越来越重要。本文介绍抛负载保护器件选型以及推荐Littelfuse TVS SLD8S24A和MOV V10E17AUTO、V20E17AUTO用于汽车电子功能模块抛负载保护。

器件选型    发布时间 : 2020-03-09

【应用】效率高达96%的3KW 5G通信电源设计方案

如何低成本的建设低能耗、高可靠和高功率密度的通信电源系统,成为5G通信电源的挑战。本方案采用MOSFET作为主开关器件,搭配非隔离驱动IC、隔离驱动IC、保险、输入继电器、整流桥,隔离IC、TVS和4G通讯模组等器件,实现3KW的效率高达96%的5G通信电源的高功率密度设计。

应用方案    发布时间 : 2020-05-23

【选型】为RS232串口数据线(TxD、RxD、GND)通信选择合适的TVS管

RS232通信一般由三条数据线组成,即TxD、RxD和GND,为保证RS232串口数据通信免受ESD影响,一般需要在TxD与GND、RxD与GND间加入一颗TVS管做ESD防护设计,本文推荐选用高性能版littelfuse的双向TVS管SPHV15-01ETG-C,或者选择低成本版高特双向TVS管GSD15C,两者的最大反向工作电压均为15V,均为小尺寸贴片封装,均可满足设计需求。

器件选型    发布时间 : 2019-08-20

【选型】为SD卡电源及数据线(CLK、CMD、DAT0~DAT3)通信选择一款合适的TVS管

车辆远程监终端GPRS模块上有用到SD卡,为保证SD卡数据通信免受ESD影响,需要对SD卡工作电压和数据线上均加入一款TVS管做ESD防护设计,本文推荐选用littelfuse的双向TVS管SP1233-01ETG,具有3.3V最大反向工作电压,0.5μA最大泄露电流,可安全吸收±30kV(接触放电,IEC 61000-4-2)时反复性ESD震击,而性能无任何降低。

器件选型    发布时间 : 2019-08-21

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