MC33771BTB1AE

Overview

The MC33771BTB1AE 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, supporting up to 75 V transients. The device features ADC conversions for differential cell voltages and currents, coulomb counting, and temperature measurements. It includes embedded balancing transistors with onboard 300 mA passive MOSFETs and supports standard SPI and transformer-isolated daisy chain communication via the MC33664.

Feature Summary

• Advanced measurement capabilities including synchronized current sensing with integrated PGA and high-accuracy total stack voltage monitoring.
• Integrated passive cell balancing with programmable timers and diagnostic functions to simplify application design.
• Supports isolated daisy chain or SPI communication interfaces for robust data processing and control by microcontrollers.

Applications

• Hybrid electric vehicles (HEV)
• Electric vehicles (EV)
• Energy storage systems (ESS)
• Uninterruptible power supplies (UPS)

Procurement Notes

Verify the specific suffix 'BTB1AE' against official NXP documentation to confirm exact ordering details, as suffixes may indicate specific packaging or revision variants. Ensure compatibility with the intended MCU family, such as MPC5xxx, before procurement. Confirm functional safety requirements align with ISO 26262 ASIL D capabilities if applicable to the system design.

Selection Notes

Select this component for high-voltage battery management systems requiring precise cell monitoring and balancing. It is suitable for designs needing isolated communication links to reduce noise and improve safety. Consider the 14-channel capacity for larger battery packs and verify thermal management requirements for the QFP-64 package in the target environment.

Part Context

This part belongs to the MC33771 series of battery cell controllers from NXP Semiconductors. It is part of a broader ecosystem that includes communication ICs like the MC33664 for daisy-chain networking. The series is designed to support both low-voltage and high-voltage BMS architectures in automotive and industrial sectors.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Consult NXP sales offices for alternative components or updated product recommendations based on specific design constraints.

FAQ

What is the maximum transient voltage the MC33771BTB1AE can withstand?

The device supports operation up to 61.6 V with transient tolerance up to 75 V.

Does the MC33771BTB1AE support active cell balancing?

No, it features onboard passive balancing using 300 mA low Rdson MOSFETs.