A4989 Description
The A4989 is a dual full-bridge gate driver with integrated microstepping translator suitable for driving a wide range of higher power industrial bipolar two-phase stepper motors (typically 30 to 500 W). Motor power is provided by external N-channel power MOSFETs at supply voltages from 12 to 50 V. This device contains two sinusoidal DACs that generate the reference voltage for two separate fixed off-time PWM...
A4989 Key Features
- 2-wire step and direction interface
- Dual full-bridge gate drive for N-channel MOSFETs
- Operation over 12 to 50 V supply voltage range
- Synchronous rectification
- Cross-conduction protection
- Adjustable mixed decay
- Integrated sinusoidal DAC current reference
- Fixed off-time PWM current control
- Enhanced low current control when microstepping
- Pin patible with the A3986