powersys
Advanced Member level 1
How to measure the current flowing through the inductor (i.e. L1 in the figure below) in a buck converter?
The switching frequency of the LT1074 controller is 100kHz. Most of current sensors (isolation type, e.g. hall effect sensor) cannot measure up to 100kHz (bandwidth). Therefore, I plan to use current sense resistor. But where should I install the current sensing resistor, before L1 (near sw) or after L1 (near output)? Will the additional current sensing resistor alter the performance of the buck converter?
The switching frequency of the LT1074 controller is 100kHz. Most of current sensors (isolation type, e.g. hall effect sensor) cannot measure up to 100kHz (bandwidth). Therefore, I plan to use current sense resistor. But where should I install the current sensing resistor, before L1 (near sw) or after L1 (near output)? Will the additional current sensing resistor alter the performance of the buck converter?