MC33771BTA2AER2

Overview

The MC33771BTA2AER2 is an advanced 8-channel lithium-ion battery cell controller IC from NXP Semiconductors. Designed for automotive and industrial applications, it supports a supply voltage range of 9.6 V to 61.6 V with 75 V transient tolerance. The device integrates ADC conversions for differential cell voltages and currents, coulomb counting, and temperature measurements. It features embedded balancing transistors and comprehensive diagnostics to simplify application design. Communication with the MCU is supported via standard SPI or transformer-isolated daisy chain using the MC33664.

Feature Summary

• Integrates synchronized current measurement with integrated PGA and coulomb counter for precise state estimation.
• Includes onboard passive balancing MOSFETs with programmable timers and diagnostic capabilities.
• Supports isolated daisy chain communication via MC33664 or direct SPI interface for data processing.
• Provides robust fault verification including OV/UV, OT/UT, and OC detection with sleep mode monitoring.

Applications

• Hybrid electric vehicle (HEV) battery systems
• Electric vehicle (EV) high-voltage battery management
• Energy storage systems (ESS)
• Uninterruptible power supply (UPS) units

Procurement Notes

Verify the specific suffix 'R2' against official NXP documentation to confirm tape and reel packaging specifications. Ensure compatibility with the target microcontroller family, such as MPC5xxx, before integration. Confirm that the 8-channel configuration aligns with the system's cell count requirements rather than assuming full 14-channel capability.

Selection Notes

Select this component when an 8-channel solution is sufficient for the battery stack architecture. It offers a balance between channel density and cost compared to the 14-channel variant. Consider the need for transformer isolation if long-distance daisy chaining is required, necessitating the MC33664 companion chip. Validate thermal performance within the LQFP64 package for the intended operating environment.

Part Context

This part belongs to the MC33771 series of Li-Ion battery cell controllers. It shares core architectural features with other variants like the MC33771BTA1AE but differs in channel count. The series is designed for ISO 26262 compliance up to ASIL D safety capability. It is compatible with AEC-Q100 standards for automotive reliability.

Replacement Considerations

The MC33771BTA1AE serves as a 14-channel alternative within the same series. Direct substitution requires verifying software compatibility and PCB footprint alignment. Other family members like the MC33772C offer lower voltage ranges and fewer channels, requiring significant circuit redesign.