The A3981 is an automotive programmable stepper motor driver designed for bipolar stepper motors up to 28 V and ±1.4 A, featuring SPI-compatible control, programmable current decay modes, synchronous rectification, and integrated diagnostics including stall, short-circuit, and thermal warnings. It is supplied in a 28-pin TSSOP package with an exposed thermal pad, measuring 4.4 mm × 9.7 mm with a nominal height of 1.2 mm. Operating junction temperature ranges from -40 °C to 150 °C, with thermal resistance of 28 °C/W on a 4-layer PCB and 32 °C/W on a 2-layer PCB with 24.52 cm² copper area per side.
The A3981 provides highly configurable and reliable stepper motor control for automotive applications. Features SPI control, programmable current regulation, and diagnostic capabilities for enhanced system performance.
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Download Datasheet
Manufacturer: Allegro MicroSystems, LLC
Win Source Part Number: 076680-A3981KLPTR-T
Packaging: Reel - TR
Applications: Automotive
Mounting: SMD (SMT)
Technology: DMOS
Output Current: 1.4A
Voltage - Load: 7 V to 28 V
Motor Type - Stepper: Bipolar
Step Resolution: 1, 1/2, 1/4, 1/16
Categories: Integrated Circuits
Status: Active
Temperature Range - Operating: -40°C to 150°C (TJ)
Case / Package: 28-TSSOP-EP
Purpose: Driver - Fully Integrated, Control and Power Stage
Supply Voltage - Operating: 3 V to 5.5 V
Popularity: Medium
Fake Threat In the Open Market: 53 pct.
Supply and Demand Status: Balance
Stepper Motor Controller, PDSO28, 9.70 X 4.40 MM, 1.20 MM HEIGHT, LEAD FREE, MO-153AET, TSSOP-28 Product overview: A3981KLPTR-T from Allegro MicroSystems is a Motor Driver IC for embedded motor control, robotics, automation equipment, haptic feedback, pumps, fans, and industrial motion systems. It is useful for engineers and buyers comparing datasheets, replacement parts, BOM lines, package options, lifecycle status, and procurement availability. Key searchable attributes include Stepper, TSSOP. Search-friendly keywords include motor driver IC, H-bridge, stepper motor, PWM control, motion control, Stepper, TSSOP, Motor Drivers, Controllers. This listing supports clearer product discovery for industrial, commercial, repair, automation, power, sensing, and embedded system projects. Product number 744-A3981KLPTR-T can be used for catalog matching and distributor lookup.
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| Allegro MicroSystems Inc. | Win Source Electronics | ERSAELECTRONICS PTE. LTD. | DigiKey | Quarktwin Technology Ltd. | Lingto Electronic Limited | Shenzhen Shengyu Electronics Technology Limited | |
|---|---|---|---|---|---|---|---|
| Product Category | Stepper Motor Drives | Motion Controllers | DC Motor Drives | DC Motor Drives | Motor Controllers | Motor Controllers | Motor Controllers |
| Product Number | A3981KLPTR-T | 076680-A3981KLPTR-T | 744-A3981KLPTR-T | 620-1458-2-ND | A3981KLPTR-T | A3981KLPTR-T | A3981KLPTR-T |
| Product Name | Automotive Programmable Stepper Driver | PMIC - PMIC - Motor Drivers, Controllers - A3981KLPTR-T | Stepper TSSOP Motor Driver IC | Motor Drivers, Controllers | Motor Drivers, Controllers | PMIC - Motor Drivers, Controllers | Integrated Circuits (ICs) - Power Management (PMIC) - Motor Drivers, Controllers |
| Configuration | PCB Mount | PCB Mount; "28-TSSOP (0.173"", 4.40mm Width) Exposed Pad" | |||||
| Operating Temperature | -40 to 150 C (-40 to 302 F) | -40 C (-40 F) | -40 to 150 C (-40 to 302 F) | -40 to 150 C (-40 to 302 F) | |||
| AC Input | 3 to 6 volts | 3 to 6 volts | |||||
| DC Input | 3 to 6 volts | 6 volts | 3 to 6 volts |
