MC33996EK

Overview

The MC33996EK is a dual H-bridge pre-driver integrated circuit manufactured by NXP USA Inc., designed for automotive applications. It features a 44-pin QFN package and supports SPI communication with a maximum clock frequency of 10 MHz. The device provides four half-bridge outputs capable of driving high-current inductive loads such as DC motors, stepper motors, and solenoids. It operates within a supply voltage range of 4.5V to 28V for the main power rail (VDD) and 3.0V to 3.6V for the I/O interface (VDDIO). Key electrical characteristics include a peak output current of 4.5A and a continuous current of 2.5A at a junction temperature of 150°C.

Feature Summary

• Integrates complex gate drive logic, fault protection mechanisms, and diagnostic functions into a single chip to reduce external component count.
• Provides hardware-level functional safety support compatible with ASIL-B requirements for critical automotive systems.
• Features an open-drain FAULT output signal for immediate interrupt handling upon detection of overcurrent or thermal events.

Applications

• Electric Power Steering (EPS) systems
• Electronic Brake Systems (EBS)
• Smart cabin actuators
• Industrial motor control

Procurement Notes

Verify the specific suffix 'EK' against the official NXP datasheet to confirm the package type and tape-and-reel specifications. Ensure that the ordering information matches the exact RoHS compliance status and moisture sensitivity level required for your assembly process. Cross-reference the manufacturer part number with authorized distributors to avoid counterfeit components.

Selection Notes

Select this component when designing systems requiring robust H-bridge control for high-current inductive loads in automotive environments. It is suitable for platforms where reducing MCU software burden is critical. Ensure the host microcontroller supports SPI interfaces and can handle the required voltage levels for VDDIO. Consider the thermal management requirements given the high current capabilities and operating temperature range.

Part Context

The MC33996 belongs to NXP's portfolio of specialized interface ICs for engine management and chassis control. It complements other low-side switches and gate drivers in the MC339xx series, offering a dedicated solution for bidirectional motor control. This family is engineered for high reliability in harsh electromagnetic and thermal conditions typical of under-hood automotive electronics.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Verify compatibility with existing designs before considering alternative devices from other manufacturers.

FAQ

What is the maximum SPI clock frequency supported by the MC33996?

The device supports a maximum SPI clock frequency of 10 MHz.

How does the FAULT pin operate?

The FAULT pin is an open-drain output that signals low during fault conditions, such as overcurrent or overheating, and requires an external pull-up resistor to VDDIO.