Allegro Microsystems A3979SLPTR-T A3979SLPTR-T Motor Driver/Controller Stepper 3V to 5.5V Supply 35V/2.5 A/2 Outputs TSSOP-28

The A3979SLP-T is a Microstepping DMOS Motor Driver with built-in translator. It is designed to operate bipolar stepper motors in full, half, quarter and eighth-step modes. It includes a fixed off-time current regulator that has the ability to operate in slow, fast or mixed-decay modes. This current-decay control scheme results in reduced audible motor noise, increased step accuracy and reduced power dissipation. The translator is the key to the easy implementation. Simply inputting one pulse on the STEP input drives the motor one step. There are no phase-sequence tables, high-frequency control lines or complex interfaces to program. The interface is an ideal fit for applications where a complex microprocessor is unavailable or over-burdened. Internal synchronous-rectification control circuitry is provided to improve power dissipation during PWM operation. Internal circuit protection includes thermal shutdown with hysteresis, under voltage lockout and crossover-current protection.

• ±2.5A, 35V Output rating
• Low RDS(on) outputs, 0.28R source, 0.22R sink typical
• Automatic current decay mode detection/selection
• 3 to 5.5V Logic supply voltage range
• Mixed, fast and slow current decay modes
• Home output
• Synchronous rectification for low power dissipation
• Internal UVLO and thermal shutdown circuitry
• Crossover current protection

Applications

Motor Drive & Control

Warnings Market demand for this product has caused an extension in leadtimes. Delivery dates may fluctuate. Product exempt from discounts.

Other details

Brand	ALLEGRO MICROSYSTEMS
Part Number	A3979SLPTR-T
Quantity	Each (Supplied on Cut Tape)
Technical Data Sheet EN

All product and company names are trademarks™ or registered® trademarks of their respective holders. Use of them does not imply any affiliation with or endorsement by them. Image is for illustrative purposes only. Please refer to product description.