LR Series Current Sense Application Note
The need to measure the flow of current i n electronic systems is becoming increasingly widespread. Reasons for this include the growth of battery-powered portable products, increasing concern to minimise energy usage, and the spread of electrically actuated systems in cars.
In this context, measuring a current means converting it to a voltage, which may then be compared with a threshold, digitised or otherwise processed by a current sense circuit. There are severalsolutionsfordoingthis,includingcurrent transformers, Hall-effect sensors and magnetoresistive sensors. However, the simplest and, in many cases, lowest cost method is to employ Ohm’s law in the form of a current sense resistor.
There are two problems traditionally associated with using a resistor to measure current. The first is the power dissipation at high currents - even a 1mΩ resistor dissipates 10W at 100A. The second is the lack of electrical isolation between the high current path and the sense circuit. Advances in interface circuits, which can offer both high sensitivity and isolation,can tackle both of these problems.
TT Electronics offers a large range of standard resistive current sense products. In additi on to this, TT Electronic s has many years of experience in adapting or designing components to meet the requirements of specific current sense applications.
●High precision, low value axial and chip resistors
●High power, 2- and 4-terminal current shunts
●Custom design service
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CSL 、 EBW 、 LCS 、 LOB 、 LR Series 、 LRCS 、 LVC 、 LRF3W 、 LRMA 、 LRMAP3920 、 MFC 、 OAR 、 OARS 、 OARSXP 、 PLO 、 PWRL 、 ULR 、 LR1206-R20 、 LRF2010-R005 |
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Current Sense Resistors 、 Battery Charger 、 Low Value Flat Chip Resistors 、 Hot Swap Controller |
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[ High Current Applications ][ Medium Current Applications ] |
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Application note & Design Guide |
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Please see the document for details |
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SMD |
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English Chinese Chinese and English Japanese |
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2017.9 |
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1.3 MB |
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