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Product Detailed Parameters
- Description：IC MTR DRV BIPOLR 3-5.5V 28TSSOP
- Series：-
- Mfr：Allegro MicroSystems
- Package：Tube
- Motor Type - Stepper：Bipolar
- Motor Type - AC, DC：-
- Function：Driver - Fully Integrated, Control and Power Stage
- Output Configuration：Half Bridge (4)
- Interface：Logic
- Technology：DMOS
- Step Resolution：1, 1/2, 1/4, 1/8
- Applications：General Purpose
- Current - Output：2.5A
- Voltage - Supply：3V ~ 5.5V
- Voltage - Load：8V ~ 35V
- Operating Temperature：-40°C ~ 150°C (TJ)
- Mounting Type：Surface Mount
- Package / Case：28-TSSOP (0.173", 4.40mm Width) Exposed Pad
- Supplier Device Package：28-TSSOP-EP
- Grade：-
- Qualification：-
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Overview
The A3977KLP is a bipolar stepper motor driver IC from Allegro MicroSystems, designed for high-precision motion control. It features integrated DMOS power stages capable of delivering up to 2.5A output current with a load voltage range of 8V to 35V. The device supports multiple microstepping resolutions including full, half, quarter, and eighth steps. It incorporates logic supply voltages between 3V and 5.5V and operates within a junction temperature range of -40°C to 150°C. The component is housed in a 28-TSSOP-EP package with an exposed pad for thermal management.
Feature Summary
- Integrates full bridge microstepping drive with translator functionality
- Includes adaptive decay mode for optimized current regulation
- Features comprehensive protection mechanisms such as overcurrent and thermal shutdown
Applications
- Industrial automation systems requiring precise positioning
- 3D printing equipment utilizing bipolar stepper motors
- Medical devices needing smooth and quiet motor operation
Procurement Notes
Verify the specific suffix (e.g., KLPTR) against official datasheets to confirm package type and tape/reel specifications. Ensure compatibility with existing PCB footprints, particularly regarding the exposed pad thermal design. Confirm RoHS compliance status as some variants may differ. Cross-reference lead times with authorized distributors due to potential supply chain variations.
Selection Notes
Select this component when bipolar stepper motor control with integrated translation is required. It is suitable for applications demanding high current capability up to 2.5A and wide voltage operation. Consider the thermal performance of the TSSOP-EP package for heat dissipation requirements. Evaluate the need for microstepping capabilities to reduce vibration and noise in the target application.
Part Context
The A3977 series represents Allegro's solution for complete stepper motor drive systems. This family integrates logic, control, and power stages into a single chip. The A3977KLP variant specifically targets applications requiring robust performance in industrial environments. It simplifies design by reducing external component count while maintaining high efficiency and reliability standards.
Replacement Considerations
Check for pin-compatible alternatives within the Allegro portfolio if availability is constrained. Verify that substitute components support the same voltage and current ratings. Ensure that the replacement maintains identical microstepping resolution options and protection features.
