MC33991DWR2-FR

Overview

The MC33991DWR2 is a dual H-bridge motor driver integrated circuit designed for automotive applications. It features two independent half-bridges capable of driving DC motors or inductive loads with peak currents up to 4A per bridge. The device includes built-in protection mechanisms such as overcurrent protection, thermal shutdown, and reverse polarity protection. Operating from a supply voltage range of 5V to 28V, it supports PWM control frequencies up to 20kHz. The DWR package provides efficient thermal dissipation for reliable operation in harsh environments.

Feature Summary

• Dual H-bridge architecture for independent motor control
• Integrated overcurrent and thermal protection circuits
• Supports high-frequency PWM signal input
• Reverse polarity protection on power supply

Applications

• Automotive seat adjustment motors
• Power window actuators
• Sunroof drive systems
• Electric wiper motors

Procurement Notes

Verify the exact suffix 'FR' indicates tape-and-reel packaging when ordering. Confirm that the manufacturer designation aligns with NXP Semiconductors following the acquisition of Freescale. Ensure the component meets automotive AEC-Q100 qualification standards required for your specific application environment before finalizing procurement.

Selection Notes

Select this component when dual independent motor control is required within a single package. Consider its current rating and thermal performance relative to your load requirements. Verify compatibility with your microcontroller's logic levels and PWM frequency specifications. Evaluate the need for integrated protection features versus external discrete solutions.

Part Context

This part belongs to the MC3399x family of dual H-bridge drivers. It is commonly used in automotive body electronics where space constraints and reliability are critical. The device replaces discrete MOSFET solutions, reducing board space and simplifying design complexity while maintaining robust performance under varying temperature conditions.

Replacement Considerations

Check for direct pin-compatible alternatives from NXP or other manufacturers if supply chain issues arise. Verify that any substitute maintains identical electrical characteristics, particularly peak current ratings and protection thresholds. Ensure mechanical footprint compatibility with existing PCB layouts.