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Product Detailed Parameters
- Description：IC MTR DRVR BIPOLAR 3-5.5V 24QFN
- 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-WFQFN Exposed Pad
- Supplier Device Package：24-QFN (4x4)
- Grade：-
- Qualification：-
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Overview
The A4987SESTR-T is a bipolar stepper motor driver from Allegro MicroSystems, housed in a 24-QFN (4x4 mm) surface-mount package. It integrates control logic and power stages using DMOS technology. The device supports step resolutions of full, half, and quarter steps. It operates with a supply voltage range of 3V to 5.5V and handles load voltages from 8V to 35V. The output current capability is rated at 1A. The junction temperature range extends from -20°C to 150°C.
Feature Summary
- Integrates full control logic and power stage for simplified design
- Supports multiple microstepping resolutions including full, half, and quarter steps
- Features built-in translator for easy interface with digital controllers
Applications
- General purpose stepper motor control systems
- Printers and scanners
- Medical equipment
- Security systems
Procurement Notes
Verify the specific suffix SESTR-T corresponds to the 24-QFN tape and reel packaging configuration. Confirm that the required operating temperature range aligns with the specified junction temperature limits. Ensure compatibility with the target system's logic voltage levels within the 3V to 5.5V supply range before finalizing procurement orders.
Selection Notes
Select this component when a compact solution for bipolar stepper motors is required with integrated control features. It is suitable for applications needing up to 1A output current without external heat sinking under typical conditions. Consider the 24-QFN package for space-constrained designs requiring surface mount assembly.
Part Context
This part belongs to the A498x family of stepper motor drivers from Allegro MicroSystems. These devices are designed to simplify the implementation of stepper motor control by combining all necessary functions into a single IC. The family offers various packages and current ratings to suit different application requirements.
Replacement Considerations
Check datasheets for A4985SESTR-T or A4988SETTR-T as potential alternatives. Verify pinout compatibility and electrical specifications such as current rating and voltage limits before substitution.
