MC33982CHFK

Overview

The MC33982CHFK is a high-side power switch IC manufactured by NXP USA Inc., designed for automotive applications. It features an N-channel output with a 1:1 input-to-output ratio, controlled via an SPI interface. The device operates within a load voltage range of 6V to 27V and requires a supply voltage (Vcc/Vdd) between 4.5V and 5.5V. Packaged in a 16-PowerQFN (12x12mm) surface-mount enclosure, it supports junction temperatures from -40°C to 150°C. Key electrical characteristics include a typical on-resistance of 2 milliohms. The component integrates comprehensive fault protection mechanisms including fixed current limiting, open-load detection, over-temperature shutdown, and over-voltage protection.

Feature Summary

• Integrated control via Serial Peripheral Interface (SPI) for precise configuration and monitoring
• Built-in watchdog timer functionality to ensure system reliability
• Controlled slew rate capability to minimize electromagnetic interference during switching
• Comprehensive diagnostic features including open-load detection and thermal protection

Applications

• Automotive lighting systems
• General purpose load switching in vehicle electronics
• High-side driver applications requiring SPI control

Procurement Notes

Verify the specific suffix CHFK against official NXP documentation to confirm package type and tape/reel specifications. Confirm RoHS compliance status as datasheets may indicate non-compliance for certain variants. Check product lifecycle status, as this part number may be discontinued or subject to last-time buy restrictions. Ensure compatibility with existing PCB footprints for the 16-PowerQFN package.

Selection Notes

Select this component when a single-channel high-side switch with digital SPI control is required. It is suitable for designs needing integrated diagnostics such as open-load detection and thermal shutdown. Consider the 16-PowerQFN package constraints and the 4.5V to 5.5V supply requirement. Evaluate if the 27V maximum load voltage meets the application's electrical demands.

Part Context

The MC33982 belongs to NXP's SMARTMOS technology family, which combines high-voltage CMOS control logic with lateral DMOS power transistors. This integration allows for compact solutions with built-in protection features. The device is part of a broader portfolio of power switches designed for robust automotive environments, offering alternatives to discrete MOSFET drivers by providing integrated intelligence and protection in a single package.

Replacement Considerations

Consult official NXP substitution guides for verified equivalents. Verify pinout compatibility and electrical parameter alignment before replacing.