【应用】信号延迟低至0.75us的电流检测芯片SI8921助力伺服驱动电流检测
在伺服系统中通常电机侧电流检测必不可少,因为精确的电流检测是提高系统控制精度、稳定性和快速性的重要环节,也是实现高性能闭环控制系统的关键。同时,当电机发生堵转或负载过重时,系统通过电流检测可以检测到线路上发生过流,从而保护系统的稳定性。
以下为典型的2.2kW伺服驱动器框图,图中的采样方法为电阻配合隔离放大器来实现输出电流的检测。
图1:2.2kW伺服驱动器框图
本文针对图1的用法介绍一款由美国SILICON LABS公司推出的电流检测芯片SI8921。
Si8921的主要特性如下:
· 输入差分电压有±62.5mv(SI8921A)和±250mv(SI8921B)可选;
· 32.8(SI8921A)和 8.2(SI8921B)两种增益可选;
· 输入偏置0.1mV;
· 0.75us的信号延时时间,保证响应的快速性;
· 增益误差低至0.3%,保证精度的可靠性;
· 非线性度低至0.01%;
· 芯片抗干扰性强,CMTI可达75KV/us;
· 宽的工作温度范围:-40~125℃;
· 绝缘电压等级高达5KV;
· WB Stretched SOIC-8封装;
如上面参数所示,Si8921提供极快的响应时间,信号传输通过隔离栅时仅需极小的0.75μs传输延迟,这允许伺服控制系统对瞬态负载状态进行快速响应。超低信号传输延迟使得控制环路能够快速响应,从而获得更加有效和稳定的系统,且控制器能够采取快速行动以维持预期的性能。同时其增益误差低至0.3%,可以保证采样精度的可靠性,避免因采样不准确带来系统控制不准确。
下图2为SI8921电流检测芯片的内部框图:
图2:SI8921内部框图
由图2可知SI8921电流检测芯片基于Silicon Labs专有的CMOS隔离技术,其低压差分输入非常适合测量电流分流电阻上的电压或传感器必须与控制系统隔离的任何位置,可以输出差分模拟信号,抗干扰能力强。
相信通过介绍大家对SI8921电流检测芯片的用法和特性有个初步认识,如果您的伺服驱动器电流检测需要这样一款检测芯片,那就赶紧行动吧。
最后附上SI8921电流检测芯片的两款电流检测型号如下:
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九州同路人 Lv8. 研究员 2018-10-28不错
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Cccccyn Lv3. 高级工程师 2018-10-18学习了
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有容乃大 Lv9. 科学家 2018-10-07学习了
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醉卧美人膝 Lv8. 研究员 2018-09-28可以说很精确了
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游来游去 Lv8. 研究员 2018-09-27学习
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目录- 8-bit Microcontrollers 32-bit Microcontrollers High-performance analog products wireless ICs, SoCs and modules Sensors Interface chip Timing products Isolation products Audio products Video products Voice products Data products Development Tools
型号- C8051T604-GS,SI8420AD-A-IS,WF111,SI7007-A20-IM1,SI8035AA-B-IU,C8051T604-GM,C8051F813-GU,SI8642ET-IS,C8051F541-AM,SL16020DC,C8051F813-GM,C8051F587-AM,C8051F044,SI2434,SI4613,C8051F043,SI4614,C8051F046,C8051F045,C8051F587-AQ,SI2435,C8051F047,C8051F541-AQ,TS3001,TS3002,SI2439,TS3003,SI8712CC-B-IP,TS3004,C8051F060,C8051F531-C-IM,TS3006,C8051F062,SI8710AD-B-IS,C8051F061,SI8712CC-B-IS,C8051F064,C8051F063,EFM32LG230FX - QFN64,EZR32WG230F64R69G,EFM32WG880FX - QFP100,EFM32WG980FX - QFP100,SI8233BB-C-IS1,C8051F531-C-IT,SI51210,SI8635BD-B-IS,C8051F975-A-GM,SI8230BB-B-IS1,SI8232BB-B-IS,C8051F394-A-GM,SI4624,C8051T616-GM,SI4622,SI8635BT-IS,C8051F573-IM,SI4629,C8051F530-C-AM,SI8920BD-IS,C8051F530-C-AT,C8051F801-GM,C8051F711-GQ,C8051F585-IM,SI21802,C8051F585-IQ,EFM32LG390FX - BGA112,SI8605AC-B-IS1,C8051F370-A-GM,EFM8BB10F2G-A-QFN20,C8051F066,C8051F065,C8051F067,SI2457,SI3452B-B02-GM,SI88243ED-IS,C8051F801-GU,C8051F506-AQ,SI7005-B-GM1,SI2167-C,SI21682-C,SI7022-A20-IM,SI8642AB-B-IS,SI8650ED-B-IS,SI2167-B,SI8719BC-A-IP,TSM9118,SI8631AB-B-IS,TSM9117,SI8234AB-C-IS,TSM9119,SI8234AB-C-IM,EFM32WG390FX - BGA112,SI8620AB-B-IS,SI8719BC-A-IS,SI8631EC-B-IS1,C8051F565-AM,EZR32WG330F64R55G,SI8235AB-C-IS1,C8051F835-GS,SI1132,SI3500-A-GM,TS1102-100,C8051F506-AM,C8051F565-AQ,SL2309NZ,SI8065AA-B-IU,EZR32LG230F64R60G,C8051F551-AM,EZR32LG230F128R60G,EFM32LG980FX - QFP100,SI8640AB-B-IS1,SI8600AD-B-IS,SI8710BC-B-IP,SI8710BC-B-IS,C8051F007,EFM32LG290FX - BGA112,SI8712BD-B-IM,EFM32GG295FX - BGA120,C8051F38C-GQ,SI8244BB-C-IS1,C8051F000,C8051F002,C8051F38C-GM,C8051F001,SI8620EC-B-IS,TS1005,TS1004,C8051F006,TS1003,C8051F005,TS1002,TS1001,C8051F963-B-GM,C8051F504-AQ,EFM8SB10F4G-A-QFN20,C8051F823-GS,EZR32LG230F128R61G,C8051F020,EFM32TG822FX - QFP48,SI8650BC-B-IS1,C8051F388-GQ,EFM32G200FX - QFN32,C8051F537-C-AM,C8051F563-IM,C8051F019,EZR32WG330F256R55G,C8051F018,C8051F563-IQ,C8051F011,SI2401,SI4822,C8051F010,EFM32TG222FX - QFP48,EFM32TG210FX - QFN32,SI4820,C8051F012,C8051F015,SI4826,SI2404,SI4827,C8051F017,SI4824,C8051F016,C8051F504-AM,SI4825,EFM32WG232FX - QFP64,C8051T602-GS,C8051T327-GM,C8051T602-GM,BGM111,EZR32WG330F128R68G,C8051F863-C-GS,SI88244ED-IS,C8051F811-GS,C8051F589-AM,SI8421BD-B-IS,C8051F537-C-AT,EFM32GG395FX - BGA120,C8051F531-C-AT,C8051F854-C-GM,C8051F022,C8051F021,SI4831,C8051F023,SI2415,C8051F854-C-GU,SI4835,SI2417,SI4836,EFM32WG290FX - BGA112,SI2169-C,TS1101-100,SI8455BA-B-IU,C8051F040,C8051F042,C8051F041,EZR32WG330F128R69G,SI8232AB-B-IS1,C8051F344-GQ,SI8662EC-B-IS1,SI4840,SI8452AA-B-IS1,C8051F701-GQ,SI4844,C8051F502-IM,C8051F575-IM,SI88622ED-IS,C8051F502-IQ,CP2201,CP2200,EFM32LG942FX - QFP64,SI8641BB-B-IS,EFM32GG942FX - QFP64,SI8655BB-B-IS1,SI8400AB-B-IS,SI8030AA-B-IU,C8051F587-IM,C8051F206,C8051F587-IQ,EFM32TG840FX - QFN64,SI8460AA-B-IS1,C8051F500-IQ,EZR32WG230F64R61G,C8051F546-IM,C8051F500-IM,EZR32WG330F128R67G,SI8660AB-B-IS1,C8051F827-GS,C8051F988-GU,SI52142,SI52143,SI7050,SI52144,SI7055,SI7054,SI7053,C8051F567-AQ,C8051F590-AM,C8051F567-AM,C8051F988-GM,SI8450BA-B-IS1,SI7023-A20-IM1,SL28EB742,SI8231BD-B-IS,C8051F855-C-GU,EZR32WG230F128R63G,EZR32LG230F64R68G,SI8631BC-B-IS1,C8051F300-GM,SI52111,SI52112,SI8920AD-IS,C8051F855-C-GM,SL28EB740,EFM8SB20F16G-A-QFN24,SI8641BB-B-IS1,C8051F300-GS,EFM8UB10F16G-C-QFN28,C8051F920-GQ,C8051F815-GS,C8051F920-GM,C8051F220,EFM8UB10F16G-C-QFN20,TSM9938F,EZR32LG230F64R67G,C8051F221,C8051T320-GQ,SI8651EC-B-IS1,C8051F226,C8051F862-C-GS,TSM9938H,SI8661BB-B-IS1,EZR32WG230F64R63G,SI8661ED-B-IS,SI8220DD-A-IS,EZR32LG230F64R69G,SI8405AB-A-IS1,C8051F565-IM,EFM8SB10F2G-A-QFN20,C8051F395-A-GM,C8051F565-IQ,SI8641BD-B-IS,EFM32TG232FX - 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QFP64,SI7006-A20-IM,C8051F502-AQ,SI2165-D,C8051F544-IQ,C8051F986-GU,C8051F34A-GM,SI21832,WF121,EZR32WG230F64R67G,SI8620BT-IS,C8051F569-AM,SI8642BC-B-IS1,C8051F930-GQ,C8051F986-GM,EFM8UB20F32G-A-QFP48,EZR32LG330F64R55G,EFM32LG380FX - QFP100,SI8630
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【方案】100KW双向储能优选器件方案
描述- 对业内100KW双向储能产品而言,主功率电路多采用了六管IGBT搭建的三相应用拓扑架构。因100KW双向储能选择主功率架构器件时,规格需求通常是1200V/600A(包含裕量),驱动开关频率一般在20kHz以内,考虑到体内二极管散热等因数,功率模块一般会选用三个半桥模块来搭建六管架构。
型号- SMCJ36CA,TOP267VG,SMBJ,SMAJ6.0CA,92MLSC A 24X18 H1/059AL2 0030+-0007/DI,SMBJ8.5CA,5KP200A,SMBJ51A,SMBJ75A,SMBJ70CA,TOP270EG,0324030.,5KP40A,5KP64A,SMAJ,SMBJ17CA,SMBJ40A,SMBJ64A,0324.375,5KP18CA,5KP51A,SMCJ14CA,5KP75A,SMBJ160CA,TOP269KG-TL,0314.375MXP,5KP8.5CA,SMDJ,SMBJ85A,SMBJ28CA,5KP160CA,5KP78A,SMAJ8.0A,TOP271EG,5KP,5KP28CA,SMBJ300A,0324040.,5KP30A,TOP268VG,5KP54A,SMBJ150CA,92ML 104/83 24X18,92MLSC A 24X18 H2/059AL2 0030+-0007/DI,SMCJ,SMDJ33CA,SMF12A,SMF5.0A,SMF36A,SMBJ16CA,0324030.MXP,5KP70CA,5KP17CA,SMCJ30A,TOP265VG,SMDJ20A,SMF11A,5KP180CA,SMCJ400A,MLX91208LDC-CAH-000-RE,5KP60A,SMBJ170CA,TOP271KG,0324010.,SMBJ400A,SMF10A,SMCJ8.0CA,SMBJ60A,92ML 1080/85 24X18,SMBJ15CA,SMCJ40A,TOP265KG-TL,5KP16CA,SMCJ16CA,SMCJ64A,TOP266VG,92ML 104/88 12X18,MLX91208LDC-CAH-000-SP,SMBJ26CA,SMBJ400CA,MLX91208,5KP26CA,SMBJ90CA,0324020.,92ML A 24X18 HL/HL 0400+-004/DI,SMBJ14CA,SMBJ70A,MLX91208LDC-CAH-000-TU,5KP170CA,SID1182K,5KP15CA,92G0040CVVAKP42,5KP85A,SMDJ7.0A,0324015.,92ML0488-50K042,SMBJ48CA,5KP12A,5KP36A,5KP24A,SMDJ36CA,5KP48A,5KP48CA,5KP200CA,SMBJ130CA,SMAJ18CA,5KP6.5CA,SMCJ28CA,5KP90CA,SMBJ13CA,SMF54A,SMF,5KP190CA,SMDJ51A,SMBJ36CA,5KP11A,SMAJ250CA,0314012.MXP,5KP14CA,MLX91208LDC-CAL-RE,SMBJ24CA,SMCJ200A,5KP14A,5KP26A,5KP24CA,92ML PREPREG 104/88 12.00X18.00,TOP270KG,TOPSWITCH-JX,0314040.MXP,SMBJ90A,0314015.MXP,SMBJ12CA,0314.375,SMBJ58CA,5KP13A,SMF3.3,SMBJ188CA,0324001.,SMBJ350CA,0324025.,SMCJ70A,5KP13CA,5KP36CA,5KP8.0CA,TOP264-271,SMBJ5.0A,SID11X2,SMCJ250CA,TOP269EG,SMBJ180A,SMCJ440A,SMAJ5.0CA,TOP267KG-TL,314,5KP20A,TOP270KG-TL,0324040.MXP,SMDJ11CA,5KP100CA,SMBJ11CA,SMDJ180A,5KP7.5CA,324,92G0600CWWAKP42,5KP190A,MLX91208LDC-CAL-TU,5KP210CA,92ML0488-50K098,SMDJ5.0A,5KP12CA,5KP58CA,5KP43A,SID1182,SMCJ5.0CA,SMBJ22CA,SMBJ45CA,0314040.,92ML A 24X18 H2/H2 0600+-005/DI,5KP22A,5KP58A,SMBJ170A,SMCJ220A,SMBJ10CA,5KP22CA,5KP45CA,5KP10A,5KP5.0A,0324015.HXP,SMBJ6.0A,92G0080CWAKP42,SMBJ33CA,SMBJ250CA,5KP45A,5KP33A,5KP9.0CA,5KP180A,92MLSC B 24X18 H4/059AL2 0060+-001/DI,5KP11CA,SMBJ5.0CA,5KP6.0A,SMBJ220CA,5KP110CA,92G0400CWWAKP42,TOP267EG,SMBJ160A,SMAJ16A,5KP6.0CA,92G0600CWWAWP42,92G0600CTTAKP42,TOP270VG,SMBJ78CA,TOP269KG,SMAJ48CA,5KP10CA,SMBJ43CA,TOP266EG,MLX91208LDC-CAH-TU,5KP170A,SMBJ20CA,5KP33CA,SMCJ7.5A,SMBJ7.0A,TOP268EG,5KP20CA,5KP43CA,SMBJ54CA,SMBJ18A,SI86XXISO-KIT,5KP220CA,SMAJ26A,SMBJ150A,92ML,TOP271VG,0314015.,A0-VP122PA600M7-L759F70,SMBJ6.0CA,SI86XX,5KP160A,SMCJ350A,SMBJ100CA,SMAJ15A,5KP78CA,MLX91208LDC-CAV-000-RE,SMBJ6.5A,5KP7.0CA,5KP16A,SMBJ16A,SMCJ250A,SMAJ180CA,SMBJ30CA,SMDJ15CA,5KP28A,SMBJ28A,5KP6.5A,SMBJ188A,SMCJ64CA,5KP7.0A,SMBJ8.0A,92MLHF 0104 RC:88% 24.00X18.00,5KP150A,MLX91208LDC-CAV-000-SP,SMBJ440CA,0324030.HXP,TOP264EG,5KP54CA,SMBJ64CA,0324020.MXP,5KP15A,TOP267KG,SMBJ17A,SMAJ5.0A,SMBJ120CA,SMBJ250A,SI86XXIS0-KIT,0314012.,5KP8.0A,TOP266,5KP250A,TOP268,TOP267,TOP264,5KP64CA,SMBJ14A,SMBJ75CA,92G0080CWWAKP42,SMBJ26A,5KP18A,SMBJ110CA,SMBJ7.0CA,SMBJ130A,0324010.MXP,TOP271,TOP270,SMCJ6.5A,SMBJ7.5A,5KP120CA,TOP264KG-TL,SMBJ40CA,5KP30CA,TOP265EG,SMBJ15A,TOP269,5KP17A,TOP268KG,0324025.MXP,A0-VP122PA600M7-L759F70T,92G0400CTTAKP42,SMCJ30CA,SMBJ9.0A,SMCJ16A,SMBJ12A,SMBJ51CA,5KP40CA,SMBJ36A,SMBJ24A,SMAJ6.0A,SMBJ48A,SMAJ10CA,SMBJ350A,SMBJ120A,SMAJ20A,SMBJ6.5CA,5KP130A,SMDJ51CA,5KP75CA,SMBJ13A,SMBJ85CA,TOP265KG,5KP7.5A,SMAJ33A,5KP250CA,SMBJ8.0CA,SMCJ6.0A,MLX91208LDC-CAV-000-TU,SMBJ8.5A,5KP130CA,SMBJ22A,5KP85CA,SMBJ58A,5KP70A,SMBJ110A,5KP8.5A,SMBJ300CA,VINCODUAL E3,5KP9.0A,5KP120A,SMAJ170A,SMBJ10A,5KP51CA,SMBJ11A,TOP266KG,SMBJ220A,SMCJ6.5CA,SMBJ180CA,SMCJ48A,SMCJ36A,SMCJ180A,TOP266KG-TL,SMBJ43A,5KP220A,MLX91208LDC-CAL-000-RE,92ML SC B 24X18 H3/059AL2 0.006+-0. 001,SMBJ7.5CA,SMBJ100A,TOP269VG,92ML A 24X18 H2/H2 0200+-0025/DI,SMAJ40A,92G0080CTTAKP42,SMAJ30CA,5KP5.0CA,5KP110A,SMBJ20A,5KP150CA,SMBJ45A,SMBJ33A,SMBJ9.0CA,SMDJ16A,SMBJ60CA,TOP268KG-TL,SMBJ440A,SMCJ12CA,SMCJ33CA,SMCJ58CA,5KP90A,SMBJ200CA,5KP210A,MLX91208LDC-CAL-000-SP,SMBJ78A,5KP60CA,0324001.MXP,TOP271KG-TL,0324010.HXP,SMCJ33A,MLX91208LDC-CAL-000-TU,TPCM780,SMCJ5.0A,SMBJ18CA,SMBJ30A,5KP100A,SMAJ150A,SMBJ54A,92ML PREPREG 104/88 24. 00X18. 00,MLX91208LDC-CAH-RE,SMBJ200A,0324.375HXP,TOP264KG,SMCJ22A
【选型】性能更加优越的电流检测隔离放大器SI8921替换AMC1200优势解读
AMC1200是TI公司推出的电容隔离型精密隔离放大器,可使输出端与输入电路隔开,可用于工业控制领域的电流检测。该芯片与隔离电源一起使用,可防止高共模电压线上的噪声电流进入本地接地并干扰或损坏敏感电路。本文介绍Silicon Labs公司推出的隔离放大器Si8921,该物料可替换TI公司的AMC1200,而且性价比高。
Silicon Labs(芯科科技)电源产品/定时器/IoT产品介绍
描述- 2020 April Sales Training Slides
型号- SI547,SI8422BB,SI545,SI546,SI549,XG12,XG21B,SI533XX,SI5383,XG21A,SI5342,SI5384,SI5341,SI536X,SI5347,SI5388,SI5389,SI532X,SI5348,EFR32FG22,CK440,EFR32BG22,SI5508,EFR32,SI5332-GM,SI534XH,SI5350,SI53471,SI53472,SI5392,SI5397,SI41XX,SI5351,SI828X,SI5357,SI537X,SI561,SI347X,SI562,SI560,SI565,SI566,SI5518,SI564,SI569,SI54X,XG1X,SI567,SI532XX,EFR32XG21B,SI823HX,SI538X,SI893X,BG22,SI534X,BGM220S,BGM220P,BGM220,SI51X,EFR32MG22,SI34071,SI522XX,SI834X,SI8920,SI5332,SI539X,SI88XX,SI8921,SI8922,SI5330,SI5335,SI8252X,SI3474,XG22,SI531X,XG21,SI540,SI5338,SI842X,SI830X,EFP01,SI894X,DB2000
数字隔离器选型:速度高达150M的Silicon Labs数字隔离器,成熟应用于新能源汽车,医疗,工业控制等领域
Silicon Labs数字隔离器产品具有低功耗,最多可达8通道,提供良好的电磁兼容性,有效避免外部电磁干扰,全系产品均过AEC-Q100车规级认证,常年备库存,价格便宜20%。世强是Silicon Labs数字隔离器代理商,可提供Silicon Labs数字隔离器新产品新技术、技术资料、Silicon Labs数字隔离器选型,Silicon Labs数字隔离器供应等服务。
【选型】运用在伺服控制系统的高精度电流检测芯片选型推荐
Silicon Labs推出的SI894X电流采样芯片具有Delta-Sigma的调制,实现将输入的差分模拟信号转换为输出单路数字信号进行输出采样的功能,另外采样精度达14位,可以兼容外部时钟或内部时钟采样,提高系统电流采样的。
Silicon Labs(芯科科技)Si8921隔离模拟放大器数据手册
描述- Si8921 Isolated Amplifier for Current Shunt Measurement Data Sheet.
型号- SI8921AD,SI8921BD,SI8921,SI8921BD-IS4,SI8921AD-IS4,SI8921A,SI8921B
在电量计量中,针对2节锂电池的8.4V,电流为1.5A的电量监测,推荐哪个器件可以完成电量监测呢?
推荐Silicon Labs的库仓计量芯片TS1108,该物料的Vcm=8.4V是在允许的范围2V-27V内,而芯片的供电电压为1.7V-5.25V,所以在设计时候,需要通过LDO来完成给TS1108的供电。TS1108内部的放大因子分为20V/V和200V/V,集成电流检测。如果选用TS1108-20IQT163,TS1108输出为Vout = Vbias+ Ilpad × Rsense ×(Rout/RgainB),其中RgainB=2k,Rout=40k。
Si8921/22 Isolated Amplifier Data Sheet
型号- SI8921AB-AS,SI8922AB-IS,SI8922BB-AS,SI8921BD-IS4,SI8921AD-IS4,SI8921AB-IS,SI8921A,SI8922B,SI8922BB-IS,SI8922AD-AS4,SI8922A,SI8921B,SI8922BD-IS4,SI8921AD-AS4,SI8921,SI8922,SI8922AD-IS4,SI8921BB-IS,SI8922BD-AS4,SI8922AB-AS,SI8921BD-AS4,SI8921BB-AS
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品牌:SILICON LABS
品类:Wireless Gecko SoC
价格:¥8.1764
现货: 103,128
品牌:SILICON LABS
品类:Mighty Gecko Multi-Protocol Wireless SoC
价格:¥27.0929
现货: 90,767
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品牌:SILICON LABS
品类:Switch Hall Effect Magnetic Position Sensor
价格:¥2.2924
现货:126,000
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可定制排针排母间距:0.8~2.54mm,排数:1~3,电流:最大不超过10A;环境温度:-45度~+125度;寿命/拔插次数:不超过5000次。
最小起订量: 5000 提交需求>
提供多种可压缩材料如导热硅胶、散热垫片、各种相变材料以及其他粘合剂和固体试样的材料导热系数测试,给出测试结果及数据解析报告;测试范围:最大加热电流5A;热阻范围:0.01K/W-5K/W。
实验室地址: 深圳 提交需求>
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