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Product Detailed Parameters
- Description：IC MTR DRVR BIPOLAR 2.5-9V 20QFN
- Series：-
- Mfr：Allegro MicroSystems
- Package：Bulk
- Motor Type - Stepper：Bipolar
- Motor Type - AC, DC：Brushed DC
- Function：Driver - Fully Integrated, Control and Power Stage
- Output Configuration：Half Bridge (4)
- Interface：Parallel
- Technology：DMOS
- Step Resolution：1, 1/2
- Applications：Battery Powered
- Current - Output：1A
- Voltage - Supply：2.5V ~ 9V
- Voltage - Load：2.5V ~ 9V
- Operating Temperature：-20°C ~ 150°C (TJ)
- Mounting Type：Surface Mount
- Package / Case：20-WFQFN Exposed Pad
- Supplier Device Package：20-QFN-EP (4x4)
- Grade：-
- Qualification：-
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Overview
The A3906SES-T is a bipolar stepper or dual brushed DC motor driver manufactured by Allegro MicroSystems. It operates on a single power supply with a voltage range of 2.5V to 9V and delivers an output current of 1A per channel. The device utilizes DMOS technology and features a parallel interface for control signals. It supports full-step and half-step resolutions. The component is housed in a 20-WFQFN package with an exposed thermal pad, measuring 4x4 mm. It functions as a fully integrated driver including control logic and power stages.
Feature Summary
- Integrates PWM current control with fixed off-time regulation managed via external sense resistors
- Includes diagnostic outputs that signal low-active events for overcurrent and overtemperature protection
- Features an internal charge pump requiring only a single external capacitor for operation
Applications
- Battery-powered office automation equipment
- Industrial automation systems
- Retail point-of-sale mechanisms
- 3D printing motion control
- Medical devices and CCTV pan-tilt units
Procurement Notes
Verify the specific suffix against official datasheets to confirm pinout and thermal pad configuration. Confirm RoHS3 compliance status for environmental regulations. Check moisture sensitivity level (MSL 2) requirements for storage and handling. Ensure the ordering part number matches the exact package variant required for the PCB layout.
Selection Notes
Select this component for applications requiring low-voltage operation between 2.5V and 9V. It is suitable for designs needing integrated current limiting without complex external circuitry. Consider the 20-QFN package for thermal management needs in compact spaces. Verify compatibility with parallel control interfaces and single-supply architectures.
Part Context
This device belongs to the A3906 family of low-voltage motor drivers from Allegro MicroSystems. It is designed for portable and battery-operated systems where space and efficiency are critical. The series offers integrated solutions for bipolar stepper and brushed DC motors, reducing the bill of materials through built-in protection and control features.
Replacement Considerations
The A3916GESTR-T-1 serves as a pin-compatible alternative within the same family, offering a wider voltage range up to 15V while maintaining the 20-QFN-EP(4x4) footprint.
