This reference design provides the drive and control circuits for motor-driven applications such as automotive power seats, using both bi-directional and unidirectional motor drives. It demonstrates how to drive brushed DC motors with a small board footprint, a high degree of robustness and full diagnostic features. The design illustrates solutions for adding motor-driven comfort and convenience options, as well as replacing relay-based circuits with smarter full-featured devices.
Features
- Bi-directional drive for brushed DC motors - 30-A peak with external FETs and 10-A peak with integrated FETs
- Unidirectional drive for lumbar pump and valve
- Multiplexed current sense signals from all motors
- Reverse battery and load dump protection
- Small board footprint for each drive circuit