MC33771BSA2AE

Overview

The MC33771BSA2AE 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 75 V transients. The device features ADC conversions on differential cell voltages and currents, coulomb counting, and temperature measurements. It includes embedded balancing transistors and diagnostics. Communication with an MCU is supported via standard SPI or transformer-isolated daisy chain using the MC33664. It is compliant with MPC5xxx 32-bit MCU families.

Feature Summary

• Supports synchronized advanced current measurement with integrated current sensor and PGA.
• Features onboard passive balancing with 300mA low Rdson MOSFETs and programmable timers.
• Provides isolated daisy chain communication (with MC33664) or standard SPI interface.

Applications

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

Procurement Notes

Verify the specific suffix 'SA2' against official NXP documentation to confirm channel configuration and package details. Ensure compatibility with the intended microcontroller family, such as MPC5xxx. Confirm that the required isolation method matches the system design, as this component supports both SPI and transformer-isolated daisy chain topologies when paired with appropriate transceivers.

Selection Notes

Select this component for high-voltage battery management systems requiring precise cell monitoring. It is suitable for designs needing integrated passive balancing and functional safety up to ASIL D. Consider the communication interface requirements; if using daisy chain, ensure integration with the MC33664 transceiver. Verify thermal management needs given the onboard balancing capabilities.

Part Context

This part belongs to the MC33771 series of battery cell controllers from NXP Semiconductors. It is engineered for robust performance in demanding automotive and industrial environments. The series supports ISO 26262 standards and offers comprehensive diagnostic features to enhance system reliability and safety in lithium-ion battery applications.

FAQ

Does the MC33771BSA2AE support transformer-isolated daisy chain communication?

Yes, the MC33771 series supports transformer-isolated daisy chain communication when used with the MC33664 transceiver.

What is the maximum transient voltage the device can withstand?

The device supports operation up to 61.6 V with a transient capability of 75 V.