Precision Circuit Monitors Negative Supply Current
Supply-current monitoring is a necessary feature in high-reliability systems where excessive current can cause damage or compromise safety. Such systems avoid overload faults by monitoring their power supply and shutting it down before a fault occurs. Most current-monitoring ICs are designed for positive-voltage supplies. This application note describes a current-sensing circuit that monitors a negative power supply and provides a positive output voltage proportional to the load current.
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