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.
Features:
- Configurable for many DC motor solutions
- -14V to 80V wide common mode input range for in-line motor current sensing
- Operational for typical 9V to 18V battery supply
- Simple interfacing with MSP430™ LaunchPad™ Development Kit for digital capture
Parts Include:
INA282-Q1 Automotive, 80V, Bi-Directional, High Accuracy, Low-/High-Side, Voltage Out Current Shunt Monitor
LMV7275-Q1 Automotive, Single 1.8V Low Power Comparators with Rail-to-Rail Input
TLV2316-Q1 10-MHz, Rail-to-Rail Input/Output, Low-Voltage, 1.8-V CMOS Operational Amplifier
TPS7B69-Q1 Automotive High-Voltage Ultralow-IQ Low-Dropout Regulator
Learn more by downloading the reference design below
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