System and method for bidirectional current sense circuits

A current sense integrated circuit comprising:

• a first input terminal, and a second input terminal, a reference terminal, an output terminal, an enable terminal, and a ground terminal;
• an amplifier coupled to the first and second input terminals, the amplifier defining a sense output coupled to the output terminal;
• a first feedback path coupled between the reference terminal and the amplifier;
• a second feedback path coupled between the sense output and the amplifier;
• and
• the current sense integrated circuit configured to make the first and second electrically feedback paths conductive responsive to assertion of the enable terminal, and the current sense integrated circuit configured to make the first and second feedback paths non-conductive responsive to de-assertion of the enable terminal.

A system comprising:

• a battery;
• a load;
• a sense resistor coupled between the battery and the load;
• a current sense circuit comprising:
• an enable input;
• an amplifier coupled to the sense resistor, the operational amplifier defining a sense output;
• a first feedback path coupled between operational amplifier and a reference terminal;
• a second feedback path coupled between the operational amplifier and the sense output;
• and
• the current sense circuit configured to make the first and second feedback paths conductive responsive to assertion of the enable input, and the current sense circuit configured to make the first and second feedback paths non-conductive responsive to de-assertion of the enable input.