MC34981ABHFKR2

Overview

The MC34981ABHFKR2 is a single-channel N-channel power switch IC manufactured by NXP USA Inc. It operates in a 16-PowerQFN package and supports an output current of up to 40 A. The device features a maximum operating temperature of 125 °C and a supply current of 10 mA. It provides high-side switching with a 1:1 input-to-output ratio, designed for robust automotive applications requiring integrated fault protection and diagnostics.

Feature Summary

• Integrated fault protection including fixed current limiting, open load detection, over-temperature shutdown, and UVLO.
• Features slew rate control and a built-in watchdog timer for enhanced system reliability.

Applications

• Automotive lighting systems
• High-side load switching
• General purpose power distribution

Procurement Notes

Verify the exact suffix 'KR2' against official NXP documentation to confirm tape-and-reel packaging specifications. Ensure the component status is confirmed as active or obsolete depending on current procurement needs. Cross-reference the 16-PowerQFN package dimensions with mechanical drawings prior to PCB layout finalization.

Selection Notes

Select this component for applications requiring a single high-side N-channel switch with integrated diagnostics. Consider the 40 A continuous current capability and 125 °C junction temperature rating for thermal management. Verify compatibility with the system's voltage levels and ensure the watchdog timer functionality aligns with the microcontroller's communication protocol.

Part Context

This part belongs to NXP's family of fault-protected MOSFET pre-drivers and power switches designed for automotive environments. It complements other devices like the MC33981ADHFK, which offers dual-channel capabilities. The series emphasizes diagnostic feedback and protection mechanisms essential for safety-critical vehicle subsystems.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided source material. Consult NXP technical support for direct replacements or pin-compatible alternatives if this specific variant is discontinued.

FAQ

What type of fault protection does the MC34981ABHFKR2 include?

It includes fixed current limiting, open load detect, over-temperature protection, and under-voltage lockout (UVLO).

Is the MC34981ABHFKR2 suitable for high-side switching?

Yes, it is configured as a high-side switch with an N-channel output.