Description

The demand to retain memory on the position of the seat: window: sliding door: mirror: lift-gate: and others driven by that motor has increased as small motors within the modern automotive vehicle continue to evolve. Existing solutions utilize multiple magnetic sensors attached to the body of a motor to provide a feedback loop to the motor control module. A sensorless approach provides redundancy for existing solutions and: in some cases: removes the requirement for motors with sensors attached. The sensorless approach has become increasingly popular through the implementation of an in-line: current-sense signal-conditioning circuit. This reference design provides a solution that is easily modifiable for many automotive motor systems that control position measurement.