MAX22208ATU+T

Overview

The MAX22208ATU+T is a quad half H-bridge driver featuring four individually controllable channels rated for 65V and 3.8A. It integrates non-dissipative current sensing with an ISEN_ output pin for external monitoring. The device includes overcurrent protection (OCP), thermal shutdown (TSD), and undervoltage lockout (UVLO). A low-active FAULT pin signals error conditions. Typical total on-resistance is 0.3Ω, supporting efficient operation in motor and solenoid applications.

Feature Summary

• Integrates non-dissipative current sensing to eliminate external power resistors
• Provides individual channel control for flexible load configuration
• Includes comprehensive protection against overcurrent, thermal overload, and undervoltage

Applications

• Driving four independent solenoids
• Controlling two brushed DC motors
• Operating single stepper motors

Procurement Notes

Verify the complete part number including suffixes such as TU+T to ensure correct packaging and temperature grade. Confirm that the TQFN-38 package matches your PCB footprint requirements. Cross-reference the manufacturer's latest datasheet for any updates to electrical characteristics or recommended operating conditions before finalizing procurement.

Selection Notes

Select this component when designing systems requiring multiple high-side and low-side switches in a compact form factor. The integrated current sense simplifies torque control loops by providing a voltage proportional to load current. Ensure the application voltage does not exceed 65V and that heat dissipation strategies account for the typical 0.3Ω on-resistance under maximum load conditions.

Part Context

This device belongs to the Maxim Integrated line of advanced driver technologies designed for reduced energy consumption. It serves as a versatile interface between low-voltage controllers and higher-voltage loads. The integration of protection features and current sensing reduces the bill of materials compared to discrete solutions, making it suitable for space-constrained industrial and automotive designs.

Replacement Considerations

Check Analog Devices documentation for direct pin-to-pin replacements within the same family. Verify that alternative components support the required 65V rating and 3.8A current capacity. Ensure compatibility with the TQFN-38 package if board space is limited.

FAQ

How is current monitored without dissipative resistors?

The device uses integrated non-dissipative current sensing. The sensed current is output to the ISEN_ pin, where an external resistor converts it to a measurable voltage.

What fault indicators are available?

A low-active, open-drain FAULT pin activates when overcurrent, thermal shutdown, or undervoltage lockout conditions are detected.