Current sense amplifier

A current sense amplifier having inputs being connected to an upper side voltage and a lower side voltage of a current detection resistor, and configured to provide an output corresponding to a difference between the upper side voltage and the lower side voltage, the current sense amplifier comprises;

• a common mode voltage suppressor that suppresses a common mode voltage in the upper side voltage and the lower side voltage,
• the common mode voltage suppressor including:
• a voltage division resistor having one end being connected to the upper side voltage and the other end being connected to the lower side voltage, and configured to provide a division voltage;
• a first transistor having one end being connected to the upper side voltage and the other end being connected to a predetermined power supply;
• and
• a second transistor having one end being connected to the lower side voltage and the other end thereof being connected to the predetermined power supply;
• and
• a control end is commonly connected to a gate of the first transistor and a gate of the second transistor, and the division voltage is inputted to the control end.