Summary
This 15W, 12-mm x 20-mm, power stage reference design drives and controls the position of the brushed DC (BDC) motor operating from a three to six cell Li-ion battery. This highly efficient solution is optimized with a very small form factor that easily fits into the motor, and supports precise motor position control. The design is also capable of driving the motor at high speed without any position feedback. The reference design demonstrates fast and accurate current sensing for quality torque control, and the onboard MCU provides UART connectivity, which enables controllability with any external controller.
Features:
Brushed DC servo drive operates at voltage ranging from 6.5-V to 25.2-V (3 to 6 cell Li-ion battery)
Supports 1.4 -ARMS continuous, 2.5-A peak motor winding current, with over current and shoot-through protection
Precise motor position control with encoder or potentiometric position feedback
Very small PCB form factor of 12mm x 20mm, with >90 % power stage efficiency
Current sensing with < 1% calibrated accuracy error, enable accurate torque control
Specifications
| Manufacturer | Texas Instruments |
|---|---|
| Category | Motor Control |
| Eval Board |
Board not Stocked
|
| Voltage In |
6.5 ~ 25.2 V
|
| Number of Motors and Type |
1, DC Brush Motor
|
| Power / Current Out |
1.4 A (2.5 A Peak)
|
| Features |
Encoder Input
Over Current Protection Shoot-Through Protection (Overlap) Thermal Protection UART Interface Under Voltage Protection, Brown-Out |
| Component Count + Extras |
39 + 4
|
| Application / Target Market |
Motor Control
Robotics Vacuum Cleaner |
| Design Author |
Texas Instruments
|
| Main I.C. Base Part |
DRV8870
MSP430FR2433 |
| Date Created By Author | 2017-12 |
| Date Added To Library | 2019-01 |
