Current sense circuit

A current sense circuit comprising:

• a plurality of channels respectively including
• a plurality of first-type switches respectively configured to be turned on for supplying an electric power to a load, and
• a plurality of second-type switches respectively configured to be connected to the first-type switches in parallel for detecting respective currents flowing through the first-type switches;
• a detection terminal configured to be connected to the second-type switches;
• a feedback circuit including a single operational amplifier having a first input terminal and a second input terminal, the first input terminal configured to be connected to respective electrodes of the first-type switches close to the load, the second input terminal configured to be connected to respective electrodes of the second-type switches close to the detection terminal, the feedback circuit configured to receive a terminal voltage between corresponding one of the first-type switches and corresponding one of the second-type switches in each one of the channels;
• and
• a plurality of third-type switches respectively having bidirectional withstand voltages, and configured to be connected to the respective electrodes of the first-type switches and the first input terminal,
• wherein each one of the third-type switches connected to corresponding one of the first-type switches is further configured to be:
• turned on in a condition that the corresponding one of the first-type switches is a target driven switch as a detected target to be driven for supplying the electric power to the load;
• and
• turned off in a condition that the corresponding one of the first-type switch is a non-target driven switch as a non-detected target not to be driven for supplying the electric power to the load.