A3973 Description
Designed for pulse-width modulated (PWM) current control of bipolar microstepping stepper motors, the A3973 is capable of continuous output currents to ±1 A and operating voltages to 35 V. Internal fixed off-time PWM current-control timing circuitry can be programmed via a serial interface to operate in slow, fast, and mixed current-decay modes. The desired load-current level is set via the serial port with two...
A3973 Key Features
- ±1 A, 35 V Continuous Output Rating
- Low RDS(on) DMOS Output Drivers
- Optimized Microstepping via 6-Bit Linear DACs
- Programmable Mixed, Fast, and Slow Current Decay Modes
- 4 MHz Internal Oscillator for Digital Timing
- Serial-Interface Controls Chip Functions
- Synchronous Rectification for Low Power Dissipation
- Internal UVLO and Thermal Shutdown Circuitry
- Crossover-Current Protection
- Precision 2 V Reference