MBMI7018SA1AER2

Overview

The MBMI7018SA1AER2 is an 18-channel Li-ion battery cell controller IC designed for industrial energy storage and UPS applications. It monitors up to 18 cells and 8 temperatures with configurable digital filtering. The device features a robust isolated 2.0 Mbit/s communication interface supporting inductive or capacitive coupling, enabling daisy-chain networks of up to 62 nodes. Onboard passive balancing delivers up to 360 mA peak current with automatic sequencing and diagnostics. It operates within a supply voltage range of 9.0 V to 90 V, accommodating transients up to 94 V. The component includes nine ADC/GPIO/temperature inputs and stack voltage measurement, ensuring accuracy tuned for ESS requirements.

Feature Summary

• Monitors up to 18 battery cells and 8 temperature points with integrated configurable averaging for enhanced measurement precision.
• Provides onboard passive cell balancing with up to 360 mA peak current, featuring automatic odd/even sequencing and diagnostic capabilities.
• Supports robust isolated 2.0 Mbit/s communication via twisted-pair differential daisy chain with inductive or capacitive coupling options.
• Operates within a wide supply voltage range of 9.0 V to 90 V, handling maximum transients of 94 V for industrial resilience.

Applications

• Industrial energy storage systems (ESS)
• Uninterruptible power supplies (UPS)
• High-voltage battery management units

Procurement Notes

Verify the specific ordering suffix SA1AER2 against the manufacturer's official datasheet to confirm package type, tape-and-reel specifications, and regional availability. Ensure compatibility with SafeAssure functional safety standards if required for your system design. Cross-reference the errata sheet for any known silicon revisions that may impact integration. Confirm that the isolated communication interface matches your network topology requirements before finalizing procurement.

Selection Notes

Select this component when designing systems requiring high channel count and precise cell monitoring for industrial-grade reliability. The integrated balancing capability reduces external BOM complexity compared to discrete solutions. Consider the isolated communication interface for noise immunity in electrically noisy environments. Evaluate the wide input voltage range against your system's transient profiles to ensure stable operation under all load conditions.

Part Context

This part belongs to NXP's BMI series of battery cell controllers, specifically engineered for demanding industrial applications. It complements other NXP power conversion and sensing components in complete ESS solutions. The BMI7018 focuses on scalability and safety, aligning with NXP's Longevity Program for sustained product availability. It serves as a critical node in complex battery stacks, providing essential data acquisition and balancing functions.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Consult NXP official resources for potential cross-references or updated family members. Verify pinout and software compatibility if considering alternative models from the same manufacturer.

FAQ

What is the maximum balancing current supported by the MBMI7018SA1AER2?

The device supports onboard passive cell balancing with a peak current of up to 360 mA.

How many temperature sensors can be monitored simultaneously?

The IC is designed to monitor up to 8 temperature points in addition to the 18 battery cells.

Does the component support loop-back communication?

Yes, the isolated 2.0 Mbit/s daisy-chain communication interface supports loop-back functionality for up to 62 nodes.