A4918KEVSR-3-T

Overview

The A4918KEVSR-3-T is an automotive-grade three-phase gate driver designed for low supply voltage operation. It integrates high-side and low-side drivers with a bootstrap circuit, supporting PWM frequencies up to 20 kHz. The device features overcurrent protection, thermal shutdown, and under-voltage lockout. It operates within a supply voltage range of 6 V to 24 V and supports junction temperatures from -40°C to +150°C. Packaged in an EV-48 QFN format, it is optimized for brushless DC motor applications.

Feature Summary

• Integrated bootstrap circuit eliminates external bootstrap diode requirements
• Automotive qualification ensures reliability in harsh environments
• Built-in overcurrent protection safeguards against short circuits

Applications

• Brushless DC (BLDC) motor drives
• Automotive cooling fan systems
• Electric power steering actuators

Procurement Notes

Verify the specific suffix '3' matches the required package variant during procurement. Confirm RoHS compliance status through official manufacturer documentation before integration. Ensure supply chain partners provide valid traceability records for automotive grade components.

Selection Notes

Select this component when designing BLDC motor controllers requiring integrated gate driving capabilities. It is suitable for applications needing robust protection features like thermal shutdown and UVLO. Consider the EV-48 package constraints for PCB layout and thermal management strategies.

Part Context

This part belongs to the A4918 series of three-phase gate drivers from Allegro MicroSystems. It is specifically engineered for automotive applications, offering high reliability and performance in motor control systems. The series is known for its low supply voltage operation and integrated protection mechanisms.

Replacement Considerations

Check for direct pin-to-pin replacements within the same product family. Verify that any substitute maintains identical electrical characteristics and automotive qualification standards.