Manufacturer Part Number
A3977SLP
Manufacturer
allegro-microsystems
Introduction
Integrated stepper motor driver with DMOS microstepping technology.
Product Features and Performance
Integrated DMOS microstepping driver
User-selectable step resolution (full, half, quarter, and eighth steps)
5A output current capability
Wide voltage supply range (3V to 5.5V logic, 8V to 35V motor)
Supports current limiting via an external resistor
Low on-resistance of output transistors
Synchronous rectification for low power dissipation
Internal UVLO and thermal shutdown circuitry
Crossover-current protection
Product Advantages
High integration reduces external components and system complexity
Efficiency through synchronous rectification
Flexible step resolution settings for various applications
Thermal protections enhance reliability
Key Technical Parameters
Step Resolution: 1, 1/2, 1/4, 1/8
Output Current: 2.5A
Voltage Supply: 3V to 5.5V (Logic), 8V to 35V (Motor)
Operating Temperature: -20°C to 150°C (TJ)
Quality and Safety Features
Thermal shutdown
Under-voltage lockout (UVLO)
Crossover-current protection
Built-in synchronous rectification
Compatibility
Logic interface compatible with 3V to 5.5V logic levels
Physical compatibility with 28-TSSOP-EP package
Application Areas
General purpose stepper motor driving applications
Product Lifecycle
Obsolete (Production officially discontinued by allegro-microsystems)
Availability of replacements or upgrades should be checked with the manufacturer
Several Key Reasons to Choose This Product
Simplifies design with integrated control and power stage
High current handling capacity suitable for various motor driving applications
Selectable microstepping resolution for precise motor control
Advanced protection features for increased safety and reliability
Well-suited for general-purpose stepper motor applications due to flexibility and performance features
A3979SLPALLEGRO
A3977SEDAllegro MicroSystemsIC MTR DRVR BIPOLR 3-5.5V 44PLCC
A3977SEDTR