sabu31
Advanced Member level 1
Hello All,
I am using a current sensing IC ACS712 for sensing current in DC-link. I need to remove the default offset of 2.5V in ACS output using OPAMP MCP6022 (0-5V rail )and TL431 (2.5V ref).
However, for some time, there is a negative current. When I remove the offset using TL 431, the -ve current will result in -ve voltage. How can i protect opamp against this negative current? Will the circuit modification using diodes help to protect the opamp circuitry?
Or Else what alternative can be used for the protection of opamp.
I am using a current sensing IC ACS712 for sensing current in DC-link. I need to remove the default offset of 2.5V in ACS output using OPAMP MCP6022 (0-5V rail )and TL431 (2.5V ref).
However, for some time, there is a negative current. When I remove the offset using TL 431, the -ve current will result in -ve voltage. How can i protect opamp against this negative current? Will the circuit modification using diodes help to protect the opamp circuitry?
Or Else what alternative can be used for the protection of opamp.