MC33771CTA2AE

Overview

The MC33771CTA2AE is an advanced 14-channel lithium-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 integrated ADC conversions for differential cell voltages with averaging up to 256 samples, total stack voltage measurement with a maximum error of 0.8 mV, and synchronized current measurement using an integrated sensor with PGA offering ±0.5% accuracy. It includes onboard passive balancing MOSFETs rated at 300 mA, coulomb counting, and temperature measurements. Communication is supported via standard SPI or transformer-isolated daisy chain (with MC33664) up to 63 nodes. The component is housed in an LQFP-EP-64 package and meets AEC-Q100 qualification standards.

Feature Summary

• Supports standard SPI and transformer-isolated daisy chain communication with loopback capability for up to 63 nodes
• Features embedded balancing transistors and rich diagnostics to simplify application design
• Provides advanced voltage and temperature measurement with integrated averaging capabilities
• Includes integrated current sensor with PGA and onboard passive balancing MOSFETs

Applications

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

Procurement Notes

Verify the specific suffix TA2AE against official NXP documentation to confirm pinout and packaging details. Ensure compatibility with the intended MCU interface, particularly regarding the isolated daisy chain requirement using the MC33664 transceiver. Confirm that the LQFP-EP-64 package footprint matches the PCB layout. Check for any required safety manuals or additional documentation associated with ASIL D functional safety claims if applicable to the system design.

Selection Notes

Select this component for high-voltage battery management systems requiring precise cell monitoring and isolation. The MC33771C variant offers superior averaging capabilities compared to the B series. Consider the need for transformer isolation versus capacitive coupling, as the C series supports both while the B series is limited to transformer coupling. Evaluate the system's node count requirements, as this device supports up to 63 nodes in a daisy chain configuration, which is higher than the 15-node limit of the B series.

Part Context

The MC33771CTA2AE belongs to the MC33771C series of battery cell controllers from NXP Semiconductors. This series is part of a broader portfolio including the MC33771B, MC33772B, and MC33772C, differentiated by channel count and feature sets like averaging and communication interfaces. The C series specifically enhances diagnostic and communication capabilities over the B series, targeting robust automotive and industrial environments.

Replacement Considerations

MC33771BTA1AE