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Product Detailed Parameters
- Description：IC MTR DRV BIPOLR 3-5.5V 28TSSOP
- 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：SPI, Step/Direction
- Technology：DMOS
- Step Resolution：1, 1/2, 1/4, 1/16
- Applications：-
- Current - Output：1.4A
- Voltage - Supply：3V ~ 5.5V
- Voltage - Load：7V ~ 28V
- 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：Automotive
- Qualification：-
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Overview
The A3981KLPTR-T is a bipolar stepper motor driver IC from the A3981 series, manufactured by Allegro MicroSystems. It operates with a load supply voltage range of 7V to 28V and a logic supply voltage of 3V to 5.5V. The device supports full, half, quarter, and sixteenth-step microstepping resolutions. It features an SPI-compatible interface or simple Step and Direction inputs. The output current capability is 1.4A per phase. It is housed in a 28-TSSOP-EP package and is rated for automotive grade operation.
Feature Summary
- Integrates a built-in translator for easy operation via Step/Direction or SPI interfaces
- Supports multiple microstepping modes including full, half, quarter, and sixteenth step
- Features DMOS technology for high-efficiency power driving
Applications
- Automotive systems requiring bipolar stepper motor control
- Consumer electronics utilizing integrated motor drivers
- Industrial automation equipment needing precise positioning
Procurement Notes
Verify the specific suffix KLPTR-T against official Allegro MicroSystems documentation to confirm package type and tape-and-reel specifications. Ensure compatibility with your system's voltage levels (7V-28V load, 3V-5.5V logic) and interface requirements (SPI or Step/Direction). Confirm automotive qualification status if required for your application environment.
Selection Notes
Select this component when a single-chip solution for bipolar stepper motors is needed with support for up to sixteenth-step microstepping. It is suitable for applications requiring a 1.4A output current and operating voltages up to 28V. Consider the A4980 variant if lower voltage operation down to 3.3V is required instead of the 7V minimum of the A3981.
Part Context
The A3981KLPTR-T belongs to the A3981 family of programmable bipolar stepper motor drivers. This series is designed for automotive, consumer, and industrial markets. It provides a complete drive solution integrating control logic, translation, and power stages on a single chip, simplifying design implementation for stepper motor applications.
Replacement Considerations
The A4980KLPTR-T is a related device within the same family. It offers identical functionality but supports low-voltage operation down to 3.3V, whereas the A3981 requires a minimum of 7V. Verify voltage compatibility before substitution.
