【选型】推荐高精度金属合金电阻LRMAP2512-R005FT4用于90W汽车电子水泵电机相电流采样,精度为1%
市面上常见的汽车BLDC电子水泵输出功率一般以40W、60W、90W设计居多,采用的是12V电源系统,那么,90W汽车电子水泵输出电流为90W/12V=7.5A,为保证输出电流的精准性,通常选用高精度金属合金电阻做电流采样,那么,采样电阻选型参考如下因素:
1、低阻值,减少发热,一般选择5mΩ;
2、高的采样精度,一般选择1%精度;
3、小尺寸封装
4、低温飘特性,至少满足±200ppm/℃;
5、通过汽车级AEC-Q200认证。
针对如上设计考量,推荐选择TT Electronics高精度金属合金电阻LRMAP2512-R005FT4,典型阻值为5mΩ,精度为1%,采用Cu-Ni/Mn-Cu金属合金材料,典型温度系数TCR为±100ppm/℃,工作温度范围-55℃ ~ +170℃,有通过AEC-200认证,典型电性参数参考如下图1所示。
图1:TT Electronics金属合金电阻LRMAP2512-R005FT4典型电性参数
TT Electronics高精度金属合金电阻LRMAP2512-R005FT4可以提供极低的表面温度和出色的浪涌能量性能,在全温下均具有出色的高功率输出能力,参考如下图2所示的温度降额曲线。
图2:TT Electronics金属合金电阻LRMAP2512-R005FT4温度降额曲线
通过如上图示易知:
uLRMAP2512-R005FT4满足1%精度时,额定功率2W,可提供高达20A的交流和直流电流的高精度电流检测(根据P=I2*R计算,推出I=√(P/R),得到I=20A),在70℃条件下才需要做降额处理;
uLRMAP2512-R005FT4满足1%精度时,在120℃条件下,降额达50%,额定功率为1W,可提供高达14.14A的交流和直流电流的高精度电流检测。(根据P=I2*R计算,推出I=√(P/R),得到I≈14.14A)。
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TT Electronics Welwyn电阻选型表
TT Electronics Welwyn电阻选型,包括精密电阻、金属合金功率电阻、电流检测电阻、MELF电阻、线绕高浪涌电阻、通用表面安装电阻等,提供多参数选择,最小尺寸达0204,最小电阻值达0.2mΩ,公差范围±0.01%~±10%
产品型号
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品类
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Size
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Value(mΩ、Ω)
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Tolerance(%)
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HR0603F-100MJI
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High Value Surface Mounted Resistors
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0603
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100MΩ
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±5%
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选型表 - TT Electronics 立即选型
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【产品】TT Electronics面向汽车工业应用新推SMT开尔文分流电阻器,提供真正四端子连接精度和高电流容量
TT Electronics 宣布推出其 LRMAP4026 系列低阻值金属合金功率电阻器。该产品专为电源、电机驱动和电池监控应用设计,为包括汽车工业在内的所有工业应用提供四端Kelvin连接精度和高电流容量。
LRMAP3920B-R0005FT PCBLib&Schlib&Intlib
TT ELECTRONICS - 低电阻金属合金功率电阻器,LOW RESISTANCE METAL ALLOYPOWER RESISTORS,LRMAP3920B-R0005FT
LRMA系列低阻金属合金电阻器
该资料介绍了TT Electronics公司生产的低电阻金属合金电阻器(LRMA系列)。这些电阻器适用于功率电子领域的电流检测,具有高温度操作能力至170°C,符合RoHS标准且无卤素。产品特性包括不同的尺寸、功率等级、阻值范围和公差级别。
TT ELECTRONICS - RESISTORS,LOW RESISTANCE METAL ALLOY RESISTOR,电阻器,低电阻金属合金电阻器,LRMAP2512,LRMA SERIES,LRMA2512,LRMAM2512-R01□□□FT4,LRMAM2512,LRMAM2512-R01FT4,LRMAT2512,LRMAM1206-R001,LRMAM0805
【经验】以LRMAP3920系列低电阻金属合金功率电阻为例说明电流检测电阻的原理、选择及应用
在设计电流测量系统方面,TT Electronics致力于在如今竞争激烈的电路设计行业,保持领先地位。在本文中,TT Electronics将以LRMAP3920系列低电阻金属合金功率电阻为例讨论电流检测电阻的基本原理,电阻的选择和使用及其在不同行业中的各种应用。
【产品】低电阻金属合金功率电阻器LRMAP5930,额定功率高达15W,电阻范围0.1mΩ至2mΩ
TT Electronics推出的LRMAP5930为低阻值金属合金功率电阻器,具有出色的长期稳定性。其所有部件均无铅且符合EU Directive 2011/65/EU amended by (EU) 2015/863 (RoHS3)标准。
TT Electronics(TT)LRMA系列低电阻金属合金电阻器数据手册
Low Resistance Metal Alloy Resistor
TT ELECTRONICS - LOW RESISTANCE METAL ALLOY RESISTOR,低电阻金属合金电阻器,电阻器,金属合金电阻器,LRMAP2512,LRMAT2010,LRMAN0612,LRMAN1225,LRMAM2512,LRMAM1206,LRMAT2512,LRMAM0805,LRMA2512,LRMA,LRMAM2512-R01FT4,LRMAN0815,LRMAM1206-R001
【应用】高度可靠的金属合金功率电阻,助力汽车应用中的电流检测
TT Electronics公司推出的LRMAP5930系列金属合金功率电阻,阻值低至200μΩ,额定功率可高达15W,最大可测量电流值高达200A,符合汽车市场的AEC-Q200标准,适用于工业、医疗以及汽车应用中的电流检测。
LRMAP3920低阻金属合金功率电阻器
该资料介绍了TT Electronics生产的低电阻金属合金功率电阻LRMAP3920。这些电阻具有优异的长期稳定性,阻值范围从0.2mΩ到3mΩ,标准功率额定值为5W,热底座功率额定值可达10W。所有部件均为无铅设计,符合欧盟指令2011/65/EU(RoHS3)的要求。
TT ELECTRONICS - 低电阻金属合金功率电阻器,LOW RESISTANCE METAL ALLOY POWER RESISTORS,LRMAP3920,LRMAP3920B-R0005,LRMAP3920C-R001,LRMAP3920A-R0002,LRMAP3920B-R0003,LRMAP3920C-R002,LRMAP3920C-R0015FT,LRMAP3920B-R0007,LRMAP3920C-R003,LRMAP3920B-R001,LRMAP3920C-R0015
TT Electronics为电池管理系统(BMS)提供丰富的耐浪涌、高性能电阻器,还提供定制选项
TT Electronics提供广泛的产品系列和定制选项,助您的电池管理系统提升水平!EBW8518五秒钟的浪涌中具有高达180W的过载保护,LRMAP3920 /5930电阻器适用于快速和高浪涌,LRMA/ULR适于真空吸尘器的真空电池组BMS的成本和耐浪涌要求,WPRT和PWHW适于插入式HEV充电器单元中的浪涌容限和过载保护,WMHP和WSMHP电阻器具有增强的脉冲性能和安装通用性。
【产品】插接式金属合金功率电阻,适用于工业、医疗以及汽车应用中的电流检测
全球性工程电子器件供应商——TT Electronics 公司,宣布推出OAR系列金属合金功率电阻,阻值低至2mΩ,采用插接的安装方式,最大限度的保证了器件与PCB之间的距离,分离发热源,防止器件产热对其他板载器件的干扰,同时避免了PCB的热形变。适用于工业、医疗以及汽车应用中的电流检测。
电子商城
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服务
可定制UV胶的粘度范围:150~25000cps,粘接材料:金属,塑料PCB,玻璃,陶瓷等;固化方式:UV固化;双固化,产品通过ISO9001:2008及ISO14000等认证。
最小起订量: 1支 提交需求>
可定制分流器电阻范围20uΩ~100uΩ,可自由设计铜排形状尺寸,电镀:镀锡/镀镍。支持RoHS指令 、AEC-Q200。认证资格:IATF16949;ISO9001;检测精度:0.1%。
最小起订量: 100个 提交需求>
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