MC33771BTA1AE

Overview

The MC33771BTA1AE is a 14-channel Li-ion battery cell controller IC designed for automotive and industrial applications. It operates within a supply voltage range of 9.6 V to 61.6 V, with transient tolerance up to 75 V. The device provides differential cell voltage and current ADC conversions, coulomb counting, and temperature measurements. It features embedded balancing transistors supporting up to 5 mA output current and includes comprehensive diagnostic functions. Communication with the MCU is supported via standard SPI or transformer-isolated daisy chain using the MC33664. The component is housed in an LQFP-64 package.

Feature Summary

• Supports advanced voltage and temperature measurement with integrated ADC conversions for differential cell voltages and currents.
• Features embedded passive balancing transistors with dedicated timers and diagnostics to simplify application design.
• Enables isolated communication through standard SPI or transformer-isolated daisy chain interfaces for robust data processing.

Applications

• Hybrid Electric Vehicles (HEV)
• Electric Vehicles (EV)
• Energy Storage Systems (ESS)
• Uninterruptible Power Supplies (UPS)

Procurement Notes

Verify the specific suffix 'BTA1AE' against official NXP documentation to confirm exact ordering details, as suffixes often denote specific tape-and-reel packaging or quality certifications. Ensure compatibility with the intended microcontroller interface requirements before procurement. Cross-reference the part number with the latest datasheet to validate pinout and electrical specifications for your specific design implementation.

Selection Notes

Select this component for high-voltage battery management systems requiring precise cell monitoring and isolation. It is suitable for designs needing ASIL-D functional safety capabilities and supports hot-plug operations. Consider the 14-channel capacity for larger battery stacks and verify integration with MPC5xxx MCU families for optimal system control and data handling efficiency.

Part Context

This IC belongs to the MC33771 series of lithium-ion battery controllers from NXP Semiconductors. It is engineered for robust performance in demanding automotive and industrial environments. The series supports ISO 26262 standards and offers scalable solutions for various battery management architectures, ensuring reliability and safety in critical power applications.

Replacement Considerations

The MC33771C is a compatible variant within the same family, offering similar functionality with potential differences in node count support and averaging features. Verify specific electrical parameters and interface compatibility when substituting to ensure seamless integration into existing battery management system designs.

FAQ

What communication interfaces does the MC33771BTA1AE support?

It supports standard SPI and transformer-isolated daisy chain communication, typically interfacing with the MC33664 transceiver.

Does the device support passive cell balancing?

Yes, it includes onboard passive balancing MOSFETs with programmable timers and diagnostic capabilities.