A3995SEVTR-T

Overview

The A3995SEVTR-T is a dual full-bridge DMOS PWM motor driver designed for driving two brushed DC motors or bipolar stepper motors. It features an integrated synchronous rectification control circuit to reduce power dissipation during PWM operation. The device supports a supply voltage up to 36 V and delivers continuous output currents of up to 2.4 A per channel. It includes fixed off-time PWM current regulators with selectable fast or slow decay modes via the Mode input. Protection mechanisms include thermal shutdown, under-voltage lockout (UVLO), and cross-conduction protection.

Feature Summary

• Dual full-bridge architecture capable of independently controlling two brushed DC motors or one bipolar stepper motor
• Integrated synchronous rectification reduces switching losses and improves efficiency during PWM operation
• Built-in thermal shutdown and under-voltage lockout ensure reliable operation under fault conditions
• Selectable fast or slow current decay mode allows optimization of motor torque ripple and acoustic noise

Applications

• Brushed DC motor control in home appliances and office equipment
• Bipolar stepper motor drives in industrial automation systems
• Valve and pump control in automotive and HVAC applications
• Robotics actuator drivers requiring precise speed and direction control

Procurement Notes

Verify the exact suffix 'SEVTR-T' matches the required 36-lead QFN package with exposed pad and -20°C to +85°C operating range. Confirm RoHS compliance status through official Allegro documentation. Ensure ESD handling procedures are followed due to moisture sensitivity classification. Cross-reference datasheet revision dates to validate feature availability.

Selection Notes

Select this component when dual independent motor control is required within a single IC solution. The 36 V rating suits standard 24 V systems with transient tolerance. Synchronous rectification makes it suitable for battery-powered or thermally constrained designs. Evaluate thermal performance based on PCB copper area and ambient conditions given the 2.4 A per bridge capability.

Part Context

The A3995 belongs to Allegro’s family of high-current DMOS motor drivers. It integrates power switches, gate drivers, and protection circuits into a compact 36-lead QFN package. The design targets cost-sensitive applications needing robust motor control without external discrete components. Its synchronous rectification distinguishes it from earlier asynchronous bridge drivers in similar voltage classes.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided source material. Verify compatibility with existing board layouts and control signals before considering alternative devices from other manufacturers.