【应用】贴片式电流检测芯片SI8921,既满足输出电流检测又可实现输出电流保护
目前变频,伺服,UPS,光伏,OBC,车载DC-DC,通讯电源等主流的电流检测方法可能有流器,互感器,霍尔及电流检测芯片的方法来实现;其中在体积,检测精度,线性度及价格上考虑,电流检测芯片是最有优势;SILICON LABS推出的电流检测芯片SI8921可以实现输出电流检测,还可以利用对输出电流的检测来实现输出电流的短路和保护功能,另外由于是贴片式的芯片还有利于产品体积的小型化设计。
如下为SI8921的典型设计参考图,实现输出电流采样的方法是在母线上串一个采样电阻,通过采样电阻两端电压形成一个差分的信号输入到SI8921的同相端AIP,反向端AIN,由芯片内部将信号进行放大之后,将差分电压信号输出,通过外部的模数转换芯片ADC将模拟量转化成数字量后由MCU进行识别处理,最后可以实现输出电流的实时监测功能。
图1 SI8921典型运用图
相比其它的电流检测方式,SI8921具有更宽的工作温度范围-40℃-125℃,芯片能满足不同工作温度范围的需求;对于设计者而言能够对输出电流检测越准确越好,在能实时的反应真实的输出电流同时又可以准确的通过输出的电流能做一些过载,短路的保护;而SI8921的精度可以达到0.3%,可以满足输出电流高精度要求;另外在输出超过满量程的时候,输出将会给出高电平信号来给MCU进行通讯,通过MCU的控制将相应的开关管进行关断,实现输出的过载或短路保护。
SI8921具有±62.5mV和±250mV的差分电压输入模式,在该区间属于线性区,对应的放大倍数具有32.8倍和8.2倍两种可供选择,可满足的最大量程为±77mV和±310mV,但是输入的满格量程都是2.05V,所以设计者依据所需的倍数来选择相应的型号设计;参考图2:
图2 SI8921型号参考
相比其它的电流检测方法,Silicon Labs SI8921电流检测芯片作为电流检测的优势如下:
1. 具有高精度,低于0.3%,可以提高产品输出电流的检测准确性;
2. 可以实现直流电流和交流电流的检测,超量程时芯片会输出高电平,在做设计时可以根据设计电流来做输出保护;
3. SI8921具有5KV的隔离电压,75KV/us的CMTI,实现芯片原副边即高低压侧的隔离,另外高CMTI提升信号的稳定性,防止信号受干扰导致检测不准确;
4. 内部集成32.8倍或8.2倍的增益,可以在设计时省掉外加运放将采样信号进行放大再进行处理,简化设计及体积;
5. 宽的工作温度范围,支持-40℃-125℃的工作工况;另外芯片供电电压支持3.0V-5.5V,带宽支持750KHz,封装为SSO-8;设计者根据实际需求可以去进行选择合适参数匹配。
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sdlibin007 Lv7. 资深专家 2018-12-31这个应用方案挺不错,省事好用。
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用户77487378 Lv3. 高级工程师 2018-11-08受益
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bios Lv5 2018-11-04学习
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咿咿呀呀 Lv4. 资深工程师 2018-10-27学习学习
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型号- WE05DUCF,WMS140N06LG2,WMK043N10HGS,WEOS61089-17Q,WMM80R1K0S,WMB190DN10LG2,WMN26N65C4,WMQ30N04TS,WS4.5DPMF-BH,WMO35N06T1,WS6.3DFVH,WE05D5LC-B,SMF10CA,WS6.0P30SMC-B,SM4F36CA-AT,WMJ30N80M3,P8S24CA,WMN10N65C4,WS03D-B,WEOS4-100/300AS,WMN90R830S,WES806S,WMO048NV6LG4,WS18P6SMB,WMM12N80M3,WMM13N65EM,WECM5212Q,GDTN2RS3-470,WMK072N12LG2,WEOS4-150/270AS,WMLL025N10HGS,WMO80R480S,WMM90R360S,WMLL029NV8HGS,WMK05N70MM,WMK080N10LG2,WMN18N50C4,WS15D-B,WMR050N03LG4,5.0SMDJ20CAS,WMN15N60F2,WMN26N65F2,WMB120P06TS,WS64P6SMB-B,WEOS61089 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先积集成(Linearin)放大器/比较器/数据转换器/模拟开关/电源管理产品选型指南(英文)
目录- COMPANY INTRODUCTION PRODUCT INTRODUCTION Amplifiers Comparators Data Converters LDO Voltage reference Analog Switch
型号- LTC8701,LTC8705,LTC8704,LTC8703,LTC8702,LTR3030,LTC8382,LTR3033,LTP3465-XX,LTA8094,LTA809X FAMILY,LTA8092,LTC8381,LTC358,LTC324H,LTA8091,GP8101S,LTC8811,LTC8814,GP8102S,LTC8813,LTC8812,GP9301B,GP9101,LT180B2,GP9105,LT180B1,LT180B4,LT180B3,LTR3040,GP8202SL,LTR33 SERIES,GP8211S,LTP3558A,LTR3012,LTA829,LT180A4,LT180A1,LT180A3,LT180A2,LTA8074,LTA8072,LTC358H,LTA8071,LTP3454-XX,LTP3564,LTC331,LTP3567,LTC358A,LTP3559A,GP8201S,LTR3025,LTR3020,LTC321A,LTC321B,LTA8084,LTA8081,LTA8082,LTC324,LTC321,LTP3558,LTP3559,LTC8745,LTC8744,LTC8743,LTC8742,LTC8748,LTC8746,LTA6034,GP8101,LTA6031,LTC8741,LTA6032,GP8202ASL,LTC393,LTC5223,GP9305,LTC5228,LTA8224,LTA8221,LTA6042,GP9303,LTA8222,LTA6041,LTA6044,LTP3570,LTC8728,LTC8844,LTC8723,LTC8722,LTC8842,LTC8721,LTC8841,LTC3157,LTC8727,LTC8726,LTC8725,LTA809X,LTC881X FAMILY,LTC881X,LTC8838,LT199,LTC8832,LTC8831,LTC8836,LTC8835,LTC8834,LTA5054,LTC8392,LTC8391,LTC8708,LTC8707,LTC8706,LTC6004,GP8212ASL,LTP33XX,LTR3312,LTC6001,GP8301,LTA8134,LTC6002,LTC72X,LTA8131,GP8303,LTA8132,GP8302,LT199 SERIES,LTP3456-XX,LTR3325,LTR3320,LTA4584,LTA8024,LTA8021,GP8413,LTA8264,LTA4580,LTA8022,LTA8261,LTA8262,LTC728,LTA6052,LTC726,LTA6051,LTC8876,LTC8875,LTC8874,LTC8878,LT199G3,LT199G2,LTA604X,GP8312,LTC8872,GP9403,GP7101,LTC8871,LT199G1,GP8313,LTC725,LTC724,LTC722,LTC721,GP8503,GP8502,LTC8582,LTC8581,GP8501,LTC8584,GP8500,GP8212SL,LTA8292,LTA8291,LTC855X,LTA604X FAMILY,LTC8333,LTC8332,LTC8331,LTA8184,LTA8064,LTA8061,LTA8182,LTA8062,LTA8181,LTP6202,GP9301BM,GP8403,LTP829,LTR3333,LTC2467,LTR3330,LTA8274,LTA8154,GP8401,LTA8272,LTA8151,LTA8152,LTA8271,GP8513,LTC7227,GP7305,LTR3340,LTC8554,LTC7222,LTC8553,LTC8552,GP8512,LTC855X FAMILY,LTC8551,LTA8284,LTA8281,LTA8282,LTP3631,LTP3633,LTR33,LTP3635,LTP3636,LTC72X FAMILY,LTP3637
Resistor Catalog
型号- CSM06FTEUR100□,HVR03FTEX1003,LR12□T□0M50,TAR03ATCM1001,PAM03BTCX1001N,WMB,TCS12FTE□R050□,AR,AS,ART05,ART06,WMK,CN41,ARW62,CSRW0410,WMP,WMK12FTERR001K,CR..AC,ART03,WMR,CR..AC SERIES,ART02,ARF02BTCN0500N,MOF0623FAGU1001MA,SWR05,CSRH SERIES,MOF1765,SWR02,SWR03,LRJ SERIES,CFR,SWR06,CFS,CRP06,WMK SERIES,MOF0623,MFR1550,FA TYPE,TAR SERIES,LRP12FTDSR015A,FMR1550,TCS12,TCS10,CR..A SERIES,CNF..A SERIES,CS SERIES,CR..A,LR12□T□0M75,FMR,ARN06CTCS1000N,CSRP SERIES,CS,MA TYPE,CRP12,TCS06,LR12□T□1M50,TCS05,CFR0318,TR35JDD1001,TCS03,WMB12FTDSR050K,TCS02,CFS SERIES,CS06FTFUR100A,CSRH0309,CSRA0207,TR100JDD1001,ARP SERIES,CSRV0204DTDV1000,STR35,ASG12,ASG10,CSRA0204,TR50JDD1001,TR50-RF,AS03FTE1002A,CSRP0204DTDV1004,ART..A SERIES,CRG03FA7---10R,ASG0A,ARM..A SERIES,ASG05,ASG06,ASG03,MOF1550,LR12□TES□□□□,4T10,ARG03FTC1001N,ASG02,ARP06BTC□1001N,ARW25,CRG..A SERIES,MFR1145,CRW..A,FA,HVR..A SERIES,FB,FC,4T06,FD,ARW20,ARHV..A SERIES,LRSW1050FTWRR005KA,HVR SERIES,PR03DTDX1000N,CFR1550,MGQ1550,STR35JDD1001,CN..A SERIES,LRP12FTDSR015,CSRA0102,AS43JTF□1002,CN-41,WMB SERIES,LRJ03,LRJ02,ARHV05,ARHV06,LRJ05,LRJ06,CSRW0207,CSRW0309,AR03TTBX1001□,LRA1066,LR SERIES,LRP..A,LRJ12,TFAN SERIES,ARHV13,MOF0932,TAR05,CN-42,TAR06,CN-43,LRJ10,TAR03,TAR02,ARG05,ARG02,ARG03,HVR,ARG06,CRTC06FTCV1002A,MFD0727BBCV1001,FMR SERIES,LR12□TD□□□□,ARW62BTCT1001A,MF06JTEUR005,HVRC SERIES,RT-10,WMR SERIES,RT-12,CSRW SERIES,WMP SERIES,CPR12FL4----1K,CR-03FA7---10R,CSW62,CN-21,CRW SERIES,TR50-RF..A SERIES,CNF,CRG SERIES,CFR1145,ARF05,ARF06,FB TYPE,ARF03,HVR..A,TR35,CN-43JA7---10R,CSRW0207JTGV0100,ARF01,ARF02,RS SERIES,LR12□T□R005,LR12□T□R006,CRW62,LR12□T□R003,LR12□T□R004,LR12□T□R007,ARM..A,CRG03FL7---10R,CSMW62,LR12□T□R001,MF10,LR12□T□R002,MF12,PWR12JTEA1001A,MFR0623,TR50JDD1001-H,MF03,MF05,MF06,TR30,LR12□T□R010,MF02,SRV0102,FMR1145,LRSW1050,ARHV13BTC□1213A,RS-10,RS-12,MOF1145,LR,CNF22FTFY1002,MFR0318,CN..A..,FD TYPE,MA,MC,MF,AS43JTF1000A,HVRC12,LR12□TE□□□□,ARTP..A SERIES,HMR SERIES,CSRH0207,MFR SERIES,MOF2485,CNF..A,AS06,RS-03,MOF SERIES,RS-02,CSRF0204FTDV1000,LRP SERIES,AS05,CSW25FTEUR100□,SWR13,AS02,AS03,AS01,CN41JL6---1K,MFD1040,PWR SERIES,HVRC0A,CSW20,RS-0A,SWR12,LR12□TW□□□□,CRTC..A SERIES,SWR10,RS-05,CRG,HVRC06,RS-06,CSW25,TR50,CRP,PR SERIES,RT-03,RT-02,HVRC06FTEO1004,FIR05,CSRP0207,CRW,RT SERIES,MFD,CSRP0204,AS12,AS10,CRW20,AS SERIES,ASG06FTEV1002,RT-0A,TFAN43B0TC0Y1001N,MFR,RT-05,RT-06,AR03ATC□1001A,CSM,AS0A,CRW25,CSN,CRW25FC7---10R,CN..A,CSW,AR05,AR06,SWR SERIES,AR03,AR04,AR01,CS06FTGUR100□,MGQ1145,ARW..A,AR02,CSW SERIES,AS21,MGQ,CSW08,MF06JTEUR005A,CRG10,PR,RAM13,LR12,PWR..A,CSMW,CRW08,ASG..A SERIES,4T10FTFQR010N,HVR0A,AR12,AR13,AR10,CRG12,FMR0623BTNV1001□,FIR SERIES,WR27JTER1001,HVR06,MF..A,CSRF0102,HVR05,HVR02,HVR03,PWR10,PWR12,PWR13,CRW..A SERIES,CRG0A,QR,RAM05,RAM02,RAM03,RAM06,LR12□TKS□□□□,AS42,AS43,AS41,ARF,ARG,TFAN,HVR12,ARN,RAM12,ARP,CR..A..,RAM10,RS,TCS SERIES,RT,MFD SERIES,LRA0340,CRTC..A,MFD0727,ASG,QR300WR5000JB,LR12□T□6M50,CSRF0204,WMP12FTDRR003F,LR12□TDS□□□□,CSRF0207,ARW..A SERIES,CRP SERIES,RT-03NL7---1R2,CRG06,CS06,CS05,CSM SERIES,CRG05,MGQ0932,CS03,CRG02,CS02,CRG03,CS01,SWR,CRG01,TR100,LRSW1575,CSRA,ARN SERIES,MFR0318BTNW1001□,ARM02,ARM03,HMR05JL7---200M,SWR12JTEA1001□,CS13,CS12,CS10,ARM06FTC□1001A,4T,MGQ0623JA4V1004,ARN12,TR50-RF..A,ARTP03,ARTP05,HMR05,CSMW08,HMR06,CSMW SERIES,CSRW,CSRV,MF SERIES,CS25,CSRP,ARF SERIES,CFR0318JT-W1001MA,AS..A,ASG SERIES,ARN05,CSRH,ARN06,CFR0932,KNQ0932JAGU1000,ARN03,ARTP02,CSRF,LR12□TDR□□□□,TR50JDD1001-RF,CSRF SERIES,PWR12JTEA1001□,CSRH0207FTEU1003,AR SERIES,CSRA SERIES,ART..A,CS37,MFR0932,AS..A SERIES,CSMW20,LRSW..A,LR12□TER□□□□,LR12□TKR□□□□,WR,MC TYPE,PWR05,LR12□TWR□□□□,PWR06,MOF,TR50-H,CSRV SERIES,LR12□TK□□□□,SWR..A SERIES,LRA0766,CSMW36,ARM06,LRSW..A SERIES,ARM05,CS..A SERIES,PWR02,PWR03,HVR03FTEX1003A,AR..A,CN.A..,WMP17,WMP27,LR12□TWS□□□□,MGQ1760,CSRV0102,CNF22FTFY1000A,PWR,CSN SERIES,CNF42,CNF43,CRG..A,AR..A SERIES,CS62,WMP12,RAM SERIES,TR30JDD1001,LRP..A SERIES,ARP06,FMR0623,LRP06,CSM02,FIR05KTF□0020,ART03FTC□1001A,KNQ,CS75,LRSW0630,CSN13,LRP05,RS-03FL7-0R047,CRTC06,CSRA0204DTDV1000,CRTC05,CRTC03,CRTC02,KNQ SERIES,ARTP05FTC□1001A,CFS0204GT-V1000,LRA..A SERIES,CR-03FL7---10RAC,CSM12,CSRV0204,CSM10,WMR28,ASG06FTEX1022A,CSRV0207,WMR27,CNF22,LRA..A,CSM06,CSM05,CSM03,LRP10,LRP12,TAR,PR10,LRJ,CFS0207,PR12,CRW25FL4---10R,TR50JDD1001-RFA,CFS0204,LRP,TFAN43,ASG..A,WMR25,HVRC,MGQ SERIES,PR03,LRJ\LRA..A,PR02,ARHV..A,PR05,LR12JTESR002□,CSN12,CSN10,WMR06,PR06,CSN06,WMR12,CSN05,WMR10,CFR SERIES,AS03FTE□1003,MF..A SERIES,CFS0309,SWR..A,TCS,CS..A,CR-01,MGQ0623,LR12□T□2M50,ARTP..A,CSMW36FTDUR100□,LRA0340FTEDR001MIA,CSN06FTFVR100,CFR0623,4T SERIES,FMR0932,LRJ10-T-□R0R0,CR-12,PWR..A SERIES,CR-10,HMR,SWR12JTEA1001A,FIR,FC TYPE,ARG SERIES,CR-06,CN21,CR-05,CR-02,CR-03,CRW..A..,CR-0A,WMR12FTDRR005K,RAM
【IC】业界首发!芯进电子推出300A量程,5KV隔离耐压,超低内阻,过流检测的高性能单芯片电流传感器IC
芯进电子最新推出超大量程单体芯片级电流传感器CC6926,具有峰值300A量测能力,高达5KV隔离耐压,750V加强隔离工作电压,超低阻抗铜排,设置过流检测保护报警功能。该产品能够有效的测量直流或交流电流,并具有精度高、出色的线性度和温度稳定性的优点,广泛应用于汽车电子、光伏、工业控制、新能源及通信类设备领域。
产品 发布时间 : 2023-12-06
高带宽、低噪声的电流传感器集成芯片SCS系列,提供0.7μs高速响应,适用于光伏逆变电源
森尼克SCS系列是高带宽、高速响应和低噪声的电流传感器集成芯片系列,适用于包括汽车、工业、消费和通信系统等众多应用领域,为AC、DC和逆变高频开关电源的电流检测提供了高速、高带宽的集成解决方案。该芯片系列可提供多种输出模式。
产品 发布时间 : 2023-11-22
昆泰芯引领传感技术新潮流,盛情邀请您参加深圳国际传感器与应用技术展览会
昆泰芯将携多个系列产品应用重磅亮相,包括倒立摆,平衡小车,磁编多极对磁铁应用校准方案,闭环步进/伺服电机驱动方案,无刷直流电机驱动方案,磁通门漏电检测方案,磁悬浮,3D磁编摇杆、云台方案,3D磁旋钮方案,电流传感器调理芯片,数字温度传感器等。
原厂动态 发布时间 : 2024-04-13
【选型】可替换安华高ACPL-344JT的国产带保护隔离驱动芯片,峰值驱动电流更大
不间断电源、电焊机、大功率变频器等设计目前主要选用IGBT做设计,针对使用这类功率半导体器件,在实际运用中可靠性要求较高,与IGBT对应的驱动芯片,通常需要带保护的驱动芯片,基本上要具有米勒钳位功能和Desat去饱和检测功能,市场上有用安华高的ACPL-344JT,这里主要介绍国产华大半导体带保护IGBT隔离驱动芯片HSA6880-S替换安华高的ACPL-344JT,可在安华高的ACPL-3
器件选型 发布时间 : 2021-02-22
使用3路分流器来进行相电流测量的低成本解决方案,避免使用昂贵的电流传感器
3KW工业变频器电路硬件平台适用于永磁同步电机及交流感应电机,采用先进的FOC算法。本设计方案提供一种使用3路分流器来进行相电流测量的低成本解决方案,这样避免了使用昂贵的电流传感器,另外也能使用单路分流器检测电流。
设计经验 发布时间 : 2024-03-19
电子商城
品牌:SILICON LABS
品类:Wireless Gecko SoC
价格:¥8.1764
现货: 104,128
品牌:SILICON LABS
品类:Mighty Gecko Multi-Protocol Wireless SoC
价格:¥27.0929
现货: 90,767
品牌:SILICON LABS
品类:Wireless Gecko SoC
价格:¥10.4994
现货: 61,779
现货市场
品牌:SILICON LABS
品类:Switch Hall Effect Magnetic Position Sensor
价格:¥2.2924
现货:126,000
服务
可贴片PCB尺寸50*50mm-580*610mm;PCB厚度0.3-8mm;贴装精度CHIP元件+0.03,BGA Pitch 大于0.25mm;元件尺寸0201-74*74BGA;元件高度:30mm。
最小起订量: 1 提交需求>
可根据用户的MOSFET管进行参数检测出具报告,静态参数最大电压:7500V、检测最大电流6000A;动态参数最大电压:3300V、检测最大电流:4500A。该测试标准满足GB、IEC及行业标准等,具备可靠性评估及老化实验能力。
实验室地址: 西安 提交需求>
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