BTN7971BAUMA1

Overview

The BTN7971BAUMA1 is a fully integrated high-current half-bridge power block from the Infineon NovalithIC family. It combines one P-channel high-side MOSFET and one N-channel low-side MOSFET with an integrated driver IC in a single package. The device utilizes vertical MOS technology for optimum on-state resistance, eliminating the need for a charge pump due to the P-channel high-side switch. It features logic level inputs, current sense diagnosis, adjustable slew rates, and dead time generation. Key electrical parameters include a minimum peak current capability of 50 A, typical path resistance of 16 mΩ at 25°C, typical quiescent current of 7 µA at 25°C, PWM capability up to 25 kHz, and operation down to 4.5 V.

Feature Summary

• Integrates P-channel high-side and N-channel low-side MOSFETs with driver IC to eliminate charge pump requirements and minimize EMI.
• Provides comprehensive protection against overtemperature, overvoltage, undervoltage, overcurrent, and short circuit conditions.
• Features logic level inputs and current sense diagnosis for simplified microcontroller interfacing and system monitoring.
• Includes adjustable slew rates and active freewheeling for optimized EMI performance and reduced power dissipation.

Applications

• High current DC or brushless DC (BLDC) motor drives
• Power window actuators
• Sun roof mechanisms
• Central door lock systems
• Seat positioning actuators

Procurement Notes

Verify the specific suffix 'AUMA1' against the manufacturer's official datasheet to confirm pinout compatibility and thermal characteristics. Ensure the procurement source provides valid RoHS compliance documentation. Cross-reference the ordering code with Infineon's current product status to avoid obsolete stock. Confirm that the supply chain adheres to automotive quality standards if the application requires it.

Selection Notes

Select this component for applications requiring high peak current handling with minimal board space consumption. The integrated P-channel switch simplifies gate drive design by removing the need for external charge pumps. Consider the 16 mΩ typical path resistance for efficiency calculations. The 25 kHz PWM capability supports standard motor control frequencies. Evaluate the 4.5 V minimum operating voltage against the system's power supply range.

Part Context

The BTN7971BAUMA1 belongs to the NovalithIC family of intelligent power switches designed for automotive and industrial motor control. It is part of the TRILITH/NOVALITH series, which integrates power and control functions into a single robust package. This family targets cost-optimized solutions for protected high-current PWM motor drives, offering high reliability and advanced diagnostic features suitable for safety-critical automotive environments.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided source material. Verify direct replacements through Infineon's official cross-reference tools. Do not assume functional equivalence with other NovalithIC devices without detailed parameter comparison.

FAQ

Does the BTN7971B require an external charge pump?

No, the integration of a P-channel high-side MOSFET eliminates the need for an external charge pump, thereby minimizing electromagnetic interference (EMI).

What is the typical on-state resistance of the BTN7971B?

The typical path resistance is 16 mΩ at 25°C, ensuring low power loss during operation.

How does the BTN7971B handle overcurrent conditions?

It employs switched mode current limitation to reduce power dissipation during overcurrent events and includes shutdown protection against overcurrent and short circuits.