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LM2902LV-Q1 Datasheet(PDF) 16 Page - Texas Instruments |
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LM2902LV-Q1 Datasheet(HTML) 16 Page - Texas Instruments |
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16 / 38 page  8 Application and Implementation Note Information in the following applications sections is not part of the TI component specification, and TI does not warrant its accuracy or completeness. TI’s customers are responsible for determining suitability of components for their purposes, as well as validating and testing their design implementation to confirm system functionality. 8.1 Application Information The LM290xLV-Q1 devices are a family of low-power, cost-optimized operational amplifiers. The devices operate from 2.7 V to 5.5 V, are unity-gain stable, and are suitable for a wide range of general-purpose automotive applications. The input common-mode voltage range includes the negative rail, and allows the LM290xLV-Q1 to be used in any single-supply applications. 8.2 Typical Application Figure 8-1 shows the LM290xLV-Q1 device configured in a low-side current sensing application. ILOAD ZLOAD V BUS VSHUNT RSHUNT 0.1 Ÿ RF 255 NŸ RG 7.5 NŸ VOUT 5 V + í + í Figure 8-1. LM290xLV-Q1 Device in a Low-Side, Current-Sensing Application 8.2.1 Design Requirements The design requirements for this design are: • Load current: 0 A to 1 A • Output voltage: 3.5 V • Maximum shunt voltage: 100 mV 8.2.2 Detailed Design Procedure The transfer function of the circuit in Figure 8-1 is given in Equation 1: OUT LOAD SHUNT V I R Gain u u (1) The load current (ILOAD) produces a voltage drop across the shunt resistor (RSHUNT). The load current is set from 0 A to 1 A. To keep the shunt voltage below 100 mV at maximum load current, the largest allowable shunt resistor is shown using Equation 2: _ _ SHUNT MAX SHUNT LOAD MAX V 100mV R 100m I 1A : (2) LM2902LV-Q1, LM2904LV-Q1 SBOS987B – AUGUST 2020 – REVISED OCTOBER 2021 www.ti.com 16 Submit Document Feedback Copyright © 2021 Texas Instruments Incorporated Product Folder Links: LM2902LV-Q1 LM2904LV-Q1 |
Similar Part No. - LM2902LV-Q1_V02 |
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Similar Description - LM2902LV-Q1_V02 |
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