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LRC10JTRDRR010G Datasheet(PDF) 7 Page - Token Electronics Industry Co., Ltd. |
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LRC10JTRDRR010G Datasheet(HTML) 7 Page - Token Electronics Industry Co., Ltd. |
7 / 58 page Terminology & Glossary Terminology Glossary of Current Sensing Resistors What is a Current Sensing Resistor Current sensing products are the newest and fastest growing resistive products in the industry today. As with most passive products, the majority of new designs are surface mount. These resistors are used to monitor the current in a circuit and translate the amount of current in that circuit into a voltage that can be easily measured and monitored. Current Detecting Resistors Due to the increase in sales of notebook PCs, the demand for the DC/DC converter has shown rapid growth because of its high-energy conversion efficiency, and its precise current-limiting capability. However, to ensure the performance of the multiple output DC/DC converter, the current limiting voltage must be detected precisely to protect an expensive notebook PC from an overload, which is generally due to shorts within the capacitors used in these devices. For high-energy conversion efficiency various control ICs have been developed that utilize resistive components. To achieve the perfect cutoff mode of the DC load current at the programmed current-limiting voltage of the control IC, a very stable and accurate sense resistor with the following characteristics is required for precise voltage comparison. ● Very Low Ohmic Value should be below 25mΩ for minimizing power consumption at the current sensing resistor. ● Tight Tolerance must be ±1% or tighter for maximizing the current supply within the limit of accept able current. ● Low TCR is required for current sensing across the ambient temperature range of 0°C to 60°C. ● Low Thermal EMF for an accurate comparison between the programmed current-limiting voltage of the control IC and the detected voltage. Furthermore, the self-inductance should be for high frequency applications. Recommended types are general purpose current sensing products or a flame retardant type. What is a Current Sensing Resistor Current sensing products are the newest and fastest growing resistive products in the industry today. As with most passive products, the majority of new designs are surface mount. These resistors are used to monitor the current in a circuit and translate the amount of current in that circuit into a voltage that can be easily measured and monitored. 05 of 56 Version 2010 http://www.token.com.tw/ rfq token.com.tw TOKEN |
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