Transcription of Current Sensing Circuit Concepts and Fundamentals
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Current Sensing Circuit Concepts and Fundamentals
2010-2011 Microchip Technology 1AN1332 INTRODUCTIONC urrent Sensing is a fundamental requirement in a widerange of electronic applications. Typical applications that benefit from Current sensinginclude: Battery life indicators and chargers Overcurrent protection and supervising circuits Current and voltage regulators DC/DC converters Ground fault detectors Linear and switch-mode power supplies Proportional solenoid control, linear or PWM Medical diagnostic equipment Handheld communications devices Automotive power electronics Motor speed controls and overload protectionThis application note focuses on the Concepts andfundamentals of Current Sensing circuits.
aspect of low-side current sensing is that the Common mode input voltage range (VCM) of the op amp must include ground. The MCP6H0X op amp is a good choice since its V CM is from VSS – 0.3V to V DD –2.3V. Considering the advantages, choose low-side current sensing where short circuit detection is not required, and ground disturbances can be ...
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