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Product Detailed Parameters
- Description：IC MTR DRV BIPOLR 3-5.5V 24TSSOP
- Series：-
- Mfr：Allegro MicroSystems
- Package：Tape & Reel (TR),Cut Tape (CT)
- Motor Type - Stepper：Bipolar
- Motor Type - AC, DC：-
- Function：Driver - Fully Integrated, Control and Power Stage
- Output Configuration：Half Bridge (4)
- Interface：Parallel
- Technology：DMOS
- Step Resolution：1, 1/2, 1/4
- Applications：General Purpose
- Current - Output：1A
- Voltage - Supply：3V ~ 5.5V
- Voltage - Load：8V ~ 35V
- Operating Temperature：-20°C ~ 150°C (TJ)
- Mounting Type：Surface Mount
- Package / Case：24-TSSOP (0.173", 4.40mm Width) Exposed Pad
- Supplier Device Package：24-TSSOP-EP
- Grade：-
- Qualification：-
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Overview
The A4987SLPTR-T is a bipolar stepper motor driver from Allegro Microsystems, housed in a 24-lead TSSOP package with an exposed pad. It operates on a supply voltage of 3V to 5.5V and supports load voltages up to 35V. The device delivers a continuous output current of 1A per phase. It integrates full control logic and power stages for unipolar or bipolar motors. Key features include programmable microstepping resolutions of 1, 1/2, and 1/4 step, along with built-in overcurrent protection and thermal shutdown.
Feature Summary
- Integrates full control logic and power stage for simplified design
- Supports 1, 1/2, and 1/4 microstep resolution modes
- Includes overcurrent protection and thermal shutdown mechanisms
Applications
- Bipolar stepper motor control systems
- Unipolar stepper motor applications using half-bridge configuration
- General purpose motion control circuits
Procurement Notes
Verify the specific suffix 'SLPTR-T' matches the required tape-and-reel packaging format. Confirm that the 24-TSSOP-EP footprint aligns with the PCB layout, particularly regarding the exposed thermal pad requirements. Ensure the operating environment stays within the specified temperature range of -20°C to +150°C junction temperature.
Selection Notes
Select this component when a low-voltage (3V-5.5V) logic interface is required alongside higher motor supply voltages up to 35V. It is suitable for applications needing integrated protection features without external discrete components. Consider the 1A current limit when sizing for thermal management in enclosed spaces.
Part Context
This part belongs to the A49xx family of stepper motor drivers from Allegro MicroSystems. These devices are designed to replace discrete driver solutions by integrating control logic, current regulation, and protection circuits into a single IC. The family typically offers various current ratings and package options to suit different motor power requirements.
Replacement Considerations
The A4986SLPTR-T is a related device in the same series but provides a higher output current rating of 2A. Verify if the increased current capacity is necessary for the specific motor application before substituting.
