A4980KLPTR-T

Overview

The A4980KLPTR-T is a programmable bipolar stepper motor driver IC from Allegro MicroSystems, housed in a 28-lead TSSOP package with an exposed pad. It integrates a translator, current control, and protection features for full-, half-, quarter-, and sixteenth-step operation. The device operates on a load supply voltage range of 3V to 5.5V and supports a maximum output current of 1.4A. It utilizes DMOS technology and accepts Step/Direction or SPI interfaces. The component is rated for automotive applications with an operating temperature range of -40°C to +150°C.

Feature Summary

• Integrates a built-in translator for simplified control via Step and Direction inputs or SPI interface
• Supports multiple microstepping resolutions including full, half, quarter, and sixteenth steps
• Features adjustable current limit and constant off-time PWM current control

Applications

• Automotive systems requiring precise motion control
• Industrial automation equipment
• Consumer electronics utilizing bipolar stepper motors

Procurement Notes

Verify the specific suffix KLPTR-T against official datasheets to confirm the tape and reel packaging configuration. Ensure compatibility with the target PCB footprint for the 28-TSSOP-EP package. Confirm that the design meets the required thermal dissipation standards given the exposed pad requirement for proper heat sinking.

Selection Notes

Select this component when low-voltage operation down to 3V is required, distinguishing it from the A3980 which requires higher minimum voltages. Consider the SPI interface capability if digital communication is preferred over simple logic signals. Evaluate the 1.4A output capacity against the stepper motor's current requirements to ensure adequate performance margins.

Part Context

This part belongs to the A49xx family of programmable stepper drivers. It shares architectural similarities with the A3981 but offers lower voltage operation capabilities. The device is designed as a single-chip solution, combining control logic and power stages to reduce system complexity and board space requirements for stepper motor applications.

Replacement Considerations

The A3981KLPTR-T is a related variant within the same family. Verify voltage specifications carefully as the A3981 typically requires a higher minimum supply voltage compared to the A4980.