I have seen a schematic for a line following robot, but there is something that I can't understand and is shown in the figure below, what is the purpose of the Op Amp circuit? I know that BREAK input in H-Bridge is independent on other pin. Could some one explain what this circuit does?
Electronic – What does this Op Amp circuit do in this circuit for a line following robot
h-bridgerobotics
Related Topic
- Electronic – H-Bridge design understanding
- Electronic – H-Bridge Gates Stuck On
- Electronic – arduino – How to interface with an H-bridge IC (L298N) using a single PWM pin
- Electronic – How does this modified H-bridge circuit work
- Electronic – Killed two Teensy 4.0s with this circuit – looking for help diagnosing
Best Answer
The device that looks like an opamp is a comparator, it compares the
REF_I_MAX
input withISENSE_G
input. The output is low unless the sense level becomes higher than the reference voltage in which case theBRAKE_G
output becomes high.Seems to be a brake mechanism that is activated when the current of the motor exceeds the reference level (for whatever reason).