MC33988CHFKR2

Overview

The MC33988CHFKR2 is a dual high-side smart power switch from NXP Semiconductors, designed for automotive applications. It integrates two independent high-side MOSFETs with advanced diagnostic and protection features. The device operates within a supply voltage range of 6.0 V to 27 V. Key electrical characteristics include an on-resistance of 4 mΩ per channel, enabling efficient power distribution. It supports PWM control via dedicated inputs and provides comprehensive fault reporting through an SPI interface.

Feature Summary

• Integrated dual high-side switches with low on-resistance for efficient power delivery
• Advanced diagnostic capabilities including overcurrent, overtemperature, and open-load detection
• SPI interface for programmable control, configuration, and status monitoring
• Dedicated PWM input pins for direct pulse-width modulation control

Applications

• Automotive lighting systems
• Solenoid and relay driver circuits
• Power distribution units in vehicles
• General purpose high-side switching in automotive ECUs

Procurement Notes

Verify the specific suffix 'CHFKR2' against the official NXP datasheet to confirm package type, tape-and-reel quantity, and temperature grade. Ensure compatibility with existing PCB footprints and thermal management requirements. Check for end-of-life notices or recommended new replacements if availability is constrained. Confirm RoHS compliance status for your target market regulations.

Selection Notes

Select this component when dual isolated high-side switching with integrated diagnostics is required. It is suitable for applications needing precise current sensing and fault reporting via SPI. Consider the 4 mΩ on-resistance for minimizing conduction losses. Evaluate the operating temperature range and package thermal performance against system constraints. Compare with single-channel alternatives if only one output is needed to optimize cost and board space.

Part Context

This part belongs to the MC3398x family of smart power switches, widely used in automotive electronics. It complements other NXP devices like the MC33984 and MC33987 by offering a dual-channel solution with robust protection. The family is designed to meet stringent automotive reliability standards, providing a scalable platform for various power distribution needs in modern vehicle architectures.

Replacement Considerations

Check NXP documentation for direct pin-to-pin replacements such as the MC33984EHFKR2 or MC33987EHFKR2, depending on channel count and feature requirements. Verify that any substitute matches the 4 mΩ on-resistance and SPI interface compatibility. Ensure the alternative part meets the same automotive qualification standards and operating temperature range.