Purposes of Current Sense Resistors
The purposes of current sense in a circuit are divided into following three ways;
Circuit operation needs to be stopped for its safety when overcurrent flows by circuit malfunction or overload status. If the current exceeding the specified value is flowed, the status would be considered to be abnormal and the output is interrupted.
Detects the peak of saw-toothed waveform current flowed in reactor of DC/DC converters and uses for control.
To rotate three-phase motor, the phase and time of current should be controlled precisely. So this types of product detects the current flowed to each phase and gives feedback to the control circuit. Used mainly for EPS(electric power steering) or air conditioners.
Current Management(Battery Management)
Portal devices operated by secondary battery detect current or voltage applied to the batttery and grasp the remaining level and controls the circuit operations properly to endure to be used for long time.