Texas Instruments' DRV8811 provides an integrated stepper motor driver solution for printers, scanners, and other automated equipment applications. The device has two H-bridges drivers, as well as microstepping indexer logic to control a stepper motor. The output driver block for each consists of N-channel power MOSFETs configured as full Hbridges to drive the motor windings.
A simple step/direction interface allows easy interfacing to controller circuits. Pins allow configuration of the motor in full-step, half-step, quarter-step, or eighth-step modes. Decay mode and PWM off time are programmable.
Internal shutdown functions are provided for over current protection, short circuit protection, undervoltage lockout and over temperature. The DRV8811 is packaged in a PowerPad™ 28-pin HTSSOP package with thermal pad.
Functional Block Diagram
- Dual H-bridge driver with micro-stepping indexer
- Low on-resistance: 0.55 Ω
- Up to 2.5A per H-bridge
- 8 – 38V operating voltage
- PWM current control
- 16 current levels, provides 1/8th micro-step capability
- Programmable decay mode
- Internal reference
- Low pin count indexer interface
- Under-voltage lockout
- -40C to +85C operation
- Office automation machines
- Gaming machines
- Factory automation