A4993 Description
The A4993 is a flexible microstepping motor driver with integrated phase current control and a built-in translator for easy operation. It is a single chip solution designed to operate bipolar stepper motors in full-, half-, quarter-, eighth-, and sixteenth-step modes, at up to 28 V. At power-on, the A4993 is configured to drive most small stepper motors with simple step input.
A4993 Key Features
- Peak motor current up to 1.4 A at 28 V
- Low RDS(ON) outputs, 0.5 Ω source and sink typical
- Continuous operation at high ambient temperature
- 3.5 to 50 V supply operation
- Adaptive mixed current decay
- Synchronous rectification for low power dissipation
- Internal overvoltage and undervoltage lockout
- Hot warning and overtemperature shutdown
- Crossover-current protection
- Short-circuit, open-load diagnostics