MAX22211ATJ+T

Overview

The MAX22211ATJ+T is a dual H-bridge motor driver designed for driving two brushed DC motors or one stepper motor. It operates with a supply voltage range of 4.5V to 36V and supports peak currents up to 3.8A per bridge. The device integrates precise current regulation, thermal shutdown, and overcurrent protection. It utilizes a STEP/DIR interface with an internal 128-step microstepping divider for smooth motion control. Packaged in a TJ (WQFN) format, it is optimized for high efficiency and low heat generation in compact motor control applications.

Feature Summary

• Dual H-bridge architecture supporting independent control of two brushed DC motors or a single bipolar stepper motor
• Integrated non-dissipative current sensing eliminates external sense resistors, reducing board space and power loss
• Built-in 128-step microstepping divider with programmable decay modes for quiet and smooth motor operation
• Comprehensive protection features including overcurrent protection, thermal shutdown, and undervoltage lockout

Applications

• Two-axis robotic arm actuation systems
• Compact printer carriage and platen drive mechanisms
• Automotive window and seat adjustment actuators
• Industrial automation linear positioning stages

Procurement Notes

Verify the specific suffix 'ATJ' against the manufacturer's official datasheet to confirm package type and temperature grade. Ensure compatibility with the required PCB footprint for the WQFN package. Confirm availability status as distribution channels may vary by region. Cross-reference pinouts with existing designs to prevent integration errors during procurement.

Selection Notes

Select this component when dual independent motor control or single stepper drive is required within a 36V system. It is suitable for applications demanding high peak current capability with integrated thermal management. Consider the STEP/DIR interface requirements and ensure the host controller can support the necessary microstepping resolution. Evaluate thermal performance based on the specific PCB layout and ambient operating conditions.

Part Context

This part belongs to the MAX22210/MAX22211 family of high-current motor drivers from Analog Devices/Maxim Integrated. These devices are engineered for robust performance in automotive and industrial environments. The family shares core functionalities such as integrated current sensing and advanced microstepping capabilities, differing primarily in packaging options and specific configuration variants to suit diverse form factor constraints.

Replacement Considerations

The MAX22210AUI+T is a related variant within the same product family offering similar electrical specifications but potentially in a different package. Verify pin-to-pin compatibility and thermal characteristics before substitution. Consult the official replacement guide for any functional differences between package types.