STMicroelectronics – How to make a high-voltage, high-side current sensor with a low-voltage precision op amp

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By Nicolas Aupetit, STMicroelectronics Dedicated current-sense amplifiers which can handle high common-mode voltages are the designer’s common choice when implementing a high-side current-sensing circuit. But dedicated devices have some limitations: in particular, they are unsuitable for use in applications in which the common- mode voltage exceeds 70V. So what is the best way to precisely […]