【经验】带POE供电的监控摄像头供电端雷击2KV测试整改案例

时间： 2022-03-06 来源：优恩半导体

技术问答

客户产品为监控摄像头。此产品有两种供电方式，一种为常规DC12V电源供电，另一种为POE供电。POE供电在工业监控产品中应用普遍，面对复杂环境，此类接口通常也需要进行浪涌测试。经客户描述，在测试POE端口雷击浪涌±2KV时，POE芯片损坏。产品如下图所示：

案例整改过程：

整改前的方案如下图所示。在网络IP摄像头的电路中，端口使用了GDT（UN1812-230CSMD）作浪涌共模防护，客户使用两个陶瓷管做差模浪涌防护，分析确认芯片损坏是由于差模残压较高导致。

在原方案的基础上，整流桥前端加TVS管（UNS1K58CA）做差模防护。再次验证测试差模8/20μs波形 ±1KV，产品工作正常；原理如下图所示：

进一步测试共模8/20μs±2KV时，POE芯片发生短路现象。在原整改基础上，在整流桥后端加共模电感（2.2μH）退耦，且加入二级TVS管（SMBJ58CA）防护，并对方案进一步优化：将POE＋对GND的GDT去除。整改如下图所示：

最终经如上整改措施，产品通过测试。满足IEC61000-4-5 8/20μs组合波差模±1KV，共模±2KV的雷击测试要求，且差模2KV、共模4KV均可满足要求。

案例分析总结：

此产品的共模地为系统地，POE芯片也与其有电气连接。因前端的共模防护器件GDT的残压相对TVS器件来说比较高，这会让POE芯片承受过高的电压而击穿损坏。故在整流桥后端加共模电感，达到退耦和抑制共模干扰的作用。同时UNS1K58CA与SMBJ58CA形成两级差模防护，抗浪涌效果更佳。确保电路即使在复杂多变的环境下也能安全无忧的工作。

将方案中POE＋对GND的GDT去除，可以在不影响产品抗浪涌能力的情况下，为客户降低整体成本，并改善空间受限的影响。

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本文由董慧转载自优恩半导体，原文标题为:带POE供电网络IP摄像头PD供电端雷击2KV测试整改案例，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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型号- SMDJ-AT SERIES,07DXXKJ,UN2E8-XXXML SERIES,SMBJ,UN2E5-XXXLL SERIES,UN232,UN2E8-XXXL HV,4.0SMF SERIES,UN1812-XXXCSMD SERIES,10DXXKJ,5.0SMDJ-AT SERIES,P6KE SERIES,30KP SERIES,SACB SERIES,UNS1K SERIES,PXXXSC SERIES,P4KE,SMD0603 SERIES,10DXXKEC SERIES,UN490E,UN3E8-XXXHP,UNSDC12V-3L,07DXXK,07DXXL,UN3E5-XXXMSMD,PXXXSB,15KPS,PXXXSA,PXXXSB-2L,P4SMA SERIES,SA SERIES,SMAJ,UN2220 SERIES,05DXXKJ,SAC SERIES,SMF SERIES,PXXXSC,KXXXSA SERIES,20KP,5.0SMDJ SERIES,0402 SERIES,20KP SERIES,TPSMAJ SERIES,PXXXLB SERIES,SMCJ SERIES,UN3490,P4SMA,UNSDC24V-3L,SMDJ,UNS1K,UN3E6-XXXMM,UN65HVD75,UN2E8-XXXL HV SERIES,SMDT,UN1812 SERIES,UN3220 SERIES,SA,UN2E8-XXXML,UNS4032 SERIES,UN2E8-XXXHL SERIES,UN2E5-XXXL HV,UNSDC58V-2L,SMD1210 SERIES,UN2E5-XXXLSMD,PXXXEC SERIES,UN3485,UN16,5KP,1.5KE SERIES,TP5.0SMDJ,14DXXL SERIES,07DXXKBC SERIES,MCM系列,UNS2K,UN2E8-XXXMSMD,UN2E5-XXXLL HV SERIES,10DXXKEC,UNSDC24V-2L,32DXXL SERIES,UN3E8-XXXHM SERIES,SMCJ,TPSMB SERIES,UN1210-XXXBSMD SERIES,UN3E6-XXXM,TPSMDJ SERIES,UN65HVD233,UN65HVD234,100M,UN65HVD232,UN65HVD230,SMBJ-AT,UN2E5-XXXL,UN2E8-XXXM,UN1210-XXXBSMD,34SXX,KC SERIES,UN2E6-XXXLSMD SERIES,UN2E8-XXXH,UNB-XXXN-SMD,UN3E8-XXXHMF,32DXXKJ SERIES,UN1050,UN3232E,UN1050ISODUB,32DXXKJ,40DXXK,UNS3220,UNB-XXXN/M,40DXXL,UN3085NE,SMCJS,UN2E8-XXXHSMD,HCM系列,TPSMB10J,32DXXK,32DXXL,PXXXEC,UN30,PXXXEB,KXXXSB,PXXXEA,30KP,KXXXSA,P6SMB SERIES,1012,KXXXSD1,PXXXSC-2L SERIES,15KP,PXXXSC-2L,0603,SMD2920 SERIES,10SMBT,14DXXKJ,UN82C250,UNSRS485-2HL,UN82C251,10SMBJ,25DXXL SERIES,05DXXL SERIES,TPSMC SERIES,UN2H8-XXXL HV SERIES,UNSDC58V-3L,SM8Z SERIES,TPSMCJ SERIES,SM5Z,UN6,UN3E5-XXXL,UN3088E,KXXXG SERIES,PXXXTB,PXXXTA,KXXXG,UN2E5-XXXLSMD SERIES,KA SERIES,UNB-XXXN-SMD SERIES,2012,UN3088ES,07DXXL SERIES,5KP SERIES,UN3485ISO,8KP SERIES,PXXXEA SERIES,UNA-XXXN/M SERIES,SMCJS SERIES,3KP,SM8Z,UN3E5-XXXLM,SMCJ-AT SERIES,LCE SERIES,UNC-XXXN/M SERIES,UN3E8-XXXHM,PXXXSA SERIES,UNSRS485-2H,SMCJ-AT,UN0805 SERIES,PXXXDM,POE58C,15SMBJ,PXXXTB SERIES,PXXXSB-2L SERIES,UNA-XXXN-SMD,40DXXKJ SERIES,UNS3220 SERIES,UN1206 SERIES,P4KE SERIES,SM5Z SERIES,UN2E8-XXXMSMD SERIES,UN3E6-XXXMM SERIES,05DXXK,05DXXL,UN600 SERIES,1012 SERIES,UNB-XXXN/M SERIES,8.0SMDJ,UNSRS485-2L,P6SMB,SACA SERIES,40DXXKJ,1000M,40DXXL SERIES,PXXXDM SERIES,SACA,UN0603 SERIES,SACB,UN2E5-XXXL SERIES,UN2H8-XXXLL HV SERIES,SMD2920,0402,8.0SMDJ SERIES,25DXXL,25DXXK,UN30 SERIES,10DXXL SERIES,25DXXKJ,20DXXL SERIES,5KPS,UNA-XXXN-SMD SERIES,UN485E,UN2E8-XXXHL,PXXXSB SERIES,UN485ES,PXXXTA SERIES,UN3E8-XXXHMF SERIES,UN2H8-XXXLL HV,SMDJ-AT,4.0SMF,SMF,TPSMB10J SERIES,0603 SERIES,5KPS SERIES,UN2E8-XXXH SERIES,KD SERIES,UN60,SMAJ-AT SERIES,TPSMDJ,UN1206-XXXASMD SERIES,UN2E8-XXXHSMD SERIES,UN3232E-T,UN1210 SERIES,14DXXKSC,07DXXKBC,10DXXK,UNSDC48V-2L,10DXXL,53DXXK,UN3E8-XXXHSMD SERIES,2012 SERIES,UN0805,UN3E5-XXXMSMD SERIES,KA,KB,UN1812-XXXCSMD,KC,TPSMCJ,UN2E8-XXXLL HV,6.0SMAJ SERIES,KD,14DXXKSC SERIES,UNS2K SERIES,10SMBJ SERIES,TP5.0SMDJ SERIES,SMD1812 SERIES,UN60 SERIES,5.0SMDJ,UN3490E,UNSDC48V-3L,20DXXKYC SERIES,SMD0603,SMD1812,KXXXSB SERIES,UN1206,UN16 SERIES,SMBJ SERIES,UNSRS422-2H,SMDT SERIES,UN1210,UNSRS422-2L,UN135 SERIES,TPSMBJ,PXXXLC SERIES,UNS4032,UNA-XXXN/M,0201 SERIES,UN1206-XXXASMD,UN2H8-XXXL HV,5.0SMDJ-AT,UN3E5-XXXL SERIES,UNC-XXXN/M,20DXXKYC,UN3485S,UN3E6-XXXM SERIES,34SXX SERIES,UN2E5-XXXLL,0201,UN3E8-XXXHP SERIES,UN3E8-XXXH SERIES,UN1042,UN3220,TPSMAJ,UN1040,UN2E8-XXXLL HV SERIES,15KP SERIES,8KP,UN2E5-XXXL HV SERIES,UN2E6-XXXLSMD,6.0SMAJ,UN3E8-XXXHSMD,34SXXJ SERIES,SMD1206 SERIES,SMBJ-AT SERIES,TPSMA SERIES,LCE,UN600,14DXXK,UN6 SERIES,14DXXL,UNC-XXXN-SMD SERIES,UNSRS422-2HL,15SMBJ SERIES,SAC,SMD0805 SERIES,SMAJ SERIES,UN3E5-XXXLM SERIES,UN3E5-XXXLSMD SERIES,UN250 SERIES,UN3E8-XXXH,UN485CUA,UN488E,UN250,KB SERIES,PXXXLC,UN2E5-XXXLL HV,UN135,PXXXLB,PXXXLA,SMD1206,UN0603,UN1812,20DXXL,20DXXK,PXXXEB SERIES,10SMBT SERIES,1.5KE,UNC-XXXN-SMD,3KP SERIES,P6KE,KXXXSD1 SERIES,TPSMC,SMD0805,TPSMB,TPSMA6J SERIES,TPSMA,TPSMBJ SERIES,34SXXJ,20DXXKJ,SMD1210,SMDJ SERIES,UN2220,UN2E8-XXXM SERIES,TPSMA6J,UNSDC12V-2L,1.5SMC SERIES,15KPS SERIES,SMAJ-AT,PXXXLA SERIES,UN3E5-XXXLSMD

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SERIES,SMD1206-075-16V,TP5.0SMDJ33A,15KP22CAS,UN2E8-90MSMD,5KP36C,5KP36A,UN135-200,SMCJ170CA-AT,UN3220-511H,ESD05V88D-2LA,SMAJ18CA,SA17CA,UN3E6-470MM,1.5KE170CA,25D122K,5KP90CA,5.0SMDJ160CA-AT,TPSMCJ40CA,SMF,TPSMAJ13CA,UN3E5-XXXL,3KP45CA,07D301K,10SMBT28A,SMD1210-075,UN1812-120H,TPSMBJ20CA,3KP58CA,K2600SD1,TPSMBJ40A,1.5SMC440A,UN3E6-350MM,07D431K,10D471KJ,UNS3220-180K,UN2E8-600MSMD,P6SMB520A,UNS2K SERIES,UN1812-121H,20D911KJ,SMAJ440CA-AT,20D511KYC,P6SMB16CA,P6KE500C,UN250-250,P6KE500A,SMBJ90C,15SMBJ9.0A,UN2220-470HS,ESD12V12D-A,SMBJ90A,ESD12V12D-C,UN3E8 SERIES,SMBJ12CA,TP5.0SMDJ30A,TPSMAJ26CA,UNA SERIES,SMD1210-050,PESD0603E18V,SMDJ11CA-AT,UNS3220-181K,SMBJ5.0A,SMBJ350CA-AT,SMBJ5.0C,TCF03025FH35002A,UN1206-270H,SMD0805-075,UNC-SMD SERIES,20D220K,SMBJ9.0,ESD15V52D-LAF,5.0SMDJ180A-AT,PESD0603E15V,SMD1210-020,UN1210-760H,UN3E8-75HSMD,6.0SMAJ,UN0402E SERIES,UN6-250,TP5.0SMDJ36A,SMBJ58A-AT,SMDT58CA,P4SMA47CA,ESD24V32D-C,UN3E6-230MM,ESD24V32D-A,SMD1210-035,UN2E5-XXXLL,ESD0402-5R5E500,SMD1210-005,07D560K,SMBJ85A-AT,20D,UN250,PXXXXDM,P4KE400A,MCM3216B121,P4KE400C,PXXXXTB SERIES,40D431KJ,ESD03V32D-LCD,10D101K,TPSMBJ33CA,ESD03V32D-LCA,SMCJ90CA-AT,SMD0805-050,ESD03V32D-LCC,07D561K,10SMBJ18CA,TPSMDJ12CA,P6KE27CA,SMBJ30CA-AT,SMCJ120A-AT,PXXXXEC,5KP33A,SMCJ16CAS,UN1210-200BSMD,PXXXXEA,10D102K,34S1000J,PXXXXEB,14D911K,20D221K,SMD1210-150-12V,07D821KJ,SMD1210-010,5KP33C,TPSMA6J13A,20D470KJ,UN2E8-150M,SMDT45CA,15SMBJ17CA,TPSMA6J13CA,SMAJ14A-AT,10SMBT33A,SMD0805-035,ESD05V32D-A,UNB-201N-SMD,TPSMA6J14A,SA9.0,UN3E6-350M,POE SERIES,UN135-1100-S,TPSMBJ33A,SMD0805-020,UN3E8-75H,10D112K,UN135-1100-C,UNB-181N,ESD05V88D-CDN,UN2E8-150H,14D561K,TPSMB91CA,TPSMAJ SERIES,TPSMA6J15A,ESD08V52D-HA,TPSMBJ36A,SMCJ7.5C,SMCJ7.5A,SMAJ400A,SMF19CA,UN3E5-150L,SA90A,UN1812 SERIES,SA90C,10D241K,SMD0805-010,10SMBJ180A,14D431K,LCDA05C-8,LCDA05C-4,25D,P6KE220CA,SA40CA,ESD05V32D-C,HCM1012GD900B05,10SMBT7.5A,ESD05V88D-CBP,10D821KEC,SMD0805-005,UN2E8-150ML,UN1812-760HS,ESD05V88D-CBD,SMCJ64A-AT,SMBJ48CA-AT,P3800TB,TPSMBJ30A,P3800TA,SMDJ90,UN3220-471HS,P6KE100CA,5KP28C,SMDT7.0A,P6SMB SERIES,5KP28A,14D681KJ,TPSMA100A,P3800SC,P3800SB,SMDJ85,6.0SMAJ54CA,ESD30V12D-C,P3800SA,ESD30V12D-A,SMDJ80,SMAJ8.5CA,SMAJ180C,SMAJ180A,UN2E5-90LSMD,TP5.0SMDJ40A,SMDJ75CA-AT,20D122KJ,10SMBT36A,ESD3.3V04D-LC,SMAJ350CA-AT,14D361KSC,5.0SMDJ220A,SMDJ78,UN30-160,UN16-900,ESD05V08P-LC,SMDJ75,25D121K,5KP8.0C,14D561KJ,SMDJ70,5KP8.0A,UN2K8-450L,1.5SMC10A,UN0805-420H,TPSMA6J26CA,SMDJ16CA,SMCJS SERIES,14D560K,SMBJ130C,SMBJ130A,5.0SMDJ350A,SMDJ64,SMDJ60,34S210J,5KP120CA,ESD12V52D-CF,30KP120A,UNS3220 SERIES,SMDJ43A-AT,SMDJ58,UN30-185,SMDJ54,P6KE75,10SMBJ7.0CA,SMDJ51,UN2E5-3600LL,20KP132A,SMAJ160CA-AT,10SMBT7.0A,UN2K8,P6KE62CA,UN30-135,SMDJ48,P6KE68,SMDJ45,SMDJ43,UNB-401M,SMDJ40,TPSMA36CA,P6KE82,ESD15V02D-CKN,5.0SMDJ78C,SMCJ7.0C,SMDT7.5A,5.0SMDJ78A,SMCJ7.0A,SMDJ51CA,5.0SMDJ48CA,UN111B339HWA1DFL,15KP51A,TPSMDJ,SMDJ36,SMDJ33,25D751KJ,P4SMA220A,SMDJ30,10SMBJ60A,P6KE91,KB-380,SM8Z26A,ESD3.3V12D-A,ESD3.3V12D-C,SMD1812-200-16V,TPSMCJ,UN2H8-5000LL,SMDJ28,5KP8.5C,SMDJ26,5KP8.5A,SMDJ24,UN2K8-600,SMDJ22,SMDJ20,UN1210-151H,SMD0805-110-12V,SMBJ11A-AT,07D331KJ,ESD0402M,UN16 SERIES,14D751KSC,SMD1812-300-16V,SM8Z28A,SMDJ19,ESD12V52D-HA,SMDJ18,SMDJ17,SMDJ16,TPSMB10J16CA,SMDJ15,TPSMBJ,SMDJ14,TPSMB56CA,SMDJ13,SMDJ12,SMDJ11,SMDJ10,SMCJ36A,SMD0805-010-30V,P6KE30,32D621KJ,SMCJ36C,SA190CA,5.0SMDJ75C,5.0SMDJ75A,UNA-SMD,15SMBJ160CA,SMF54CA,TPSMA6J18A,P4SMA91A,P6KE27,TPSMAJ,P6SMB170A,P0300DM,UN1812-390HS,P6KE24,P6KE22,P6KE43,SMCJ45CA,UN3E8-200HSMD,UN0603E,P6KE75CA,P0300EA,P0300EB,P0300EC,P6KE39,TPSMA6J19A,UN2H8,P6KE36,TCF03025U12002A SERIES,P6KE33,10SMBJ64A,SMCJ58CA,P6KE51,TPSMBJ110CA,SMDJ180CA-AT,25D511KJ,SMD1206-300,SMDJ7.5CA,TPSMA75A,UN1812-270HS,5.0SMDJ17A-AT,1.5KE18CA,14D201KJ,UN30-110,BLC03C-4,UN2K8-350L-2,5.0SMDJ70CA,UN2E5,UN2K8-350L-1,SMCJ33A,P6KE47,SMCJ33C,TPSMA6J16A,UN2E8,UN2E8-150HL,P4SMA350A,P6KE62,P4SMA6.8CA,ESD03V23T-LC,ESD03V23T-LA,ESD08V52D-A,15SMBJ180A,14D301K,10SMBT30A,P6KE56,ESD08V52D-C,TPSMA6J17A,5.0SMDJ33CA,UNS3K,UN2E6-SMD SERIES,UN1812-390H,TPSMDJ24CA,20D361K,40D361KJ,4.0SMF13CA,SMDJ160A,SMBJ160CA-AT,TP5.0SMDJ28A,

选型指南 - 优恩半导体 PDF 英文下载

【技术】浅析瞬态抑制二极管（双向TVS管）

TVS管也叫瞬态抑制二极管，TVS管是吸收浪涌功率用的，能在极短时间内承受反向电压冲击，使两极间的电压钳位于一个特定电压上，避免后面的电路受到冲击。简单的说就是做过压保护的，在通信等产品中很常见。连接时必须反向工作在电路电源、地两端，与稳压二极管类似，但不需要限流电阻。

技术探讨发布时间 : 2021-08-26

解析TVS管的四大特点：快相应、低压放电、强吸收能力、可重复使用

在保护电子设备安全的战斗中，瞬态抑制二极管（Transient Voltage Suppressor）简称TVS管，正是不可或缺的利器。本文中优恩半导体将为大家介绍TVS管的四大特点：快相应、低压放电、强吸收能力、可重复使用。

技术探讨发布时间 : 2024-05-01

优恩半导体ESD、PPTC、GDT用于CAN总线浪涌保护，可大幅缩减单板占用体积

优恩半导体在本文将对CAN总线浪涌保护之自恢复保险丝选型进行详细的讲解，为工程师们的设计提供理论基础。

原厂动态发布时间 : 2021-09-21

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DC24V电源广泛使用在LED、安防电源等行业，远距离户外传输，导致设备及易遭受雷击浪涌及过压等损坏，此方案采用UN公司经过多年经验积累开发出来大同流的TVS管，响应速度快、残压低，使后端的电路得到全面的防护。

应用方案发布时间 : 2024-02-08

DC24V电源端口浪涌保护

DC24V电源端口浪涌保护DC24V电源是一种为设备提供稳定、可靠的直流电压输出的电源，其广泛应用于工业自动化控制系统。此方案设计为多级保护的方式，初级采用通流能力较强的陶瓷气体放电管和压敏电阻组合来承受泻放大的浪涌电流，中间使用电感做退耦，次级选用响应电压精准、稳定且快速的TVS管做保护，能有效抑制各类浪涌过电压，使后端的DC芯片及电路得到全面的保护。

应用方案发布时间 : 2024-01-24