MC33771ATA1AE

Overview

The MC33771ATA1AE is a 14-channel Li-Ion battery cell controller IC designed for automotive and industrial applications, including HEV, EV, ESS, and UPS systems. It features ADC conversions on differential cell voltages, currents, coulomb counting, and temperature measurements. The device supports a supply voltage range of 9.6 V to 61.6 V with 75 V transient capability. It integrates onboard passive balancing MOSFETs with diagnostics and supports isolated daisy chain communication via TPL or standard SPI interfaces.

Feature Summary

• Advanced measurement capabilities for cell voltages, stack voltage, current, and temperature with integrated coulomb counter
• Onboard passive balancing with programmable timers and diagnostic functions for each channel
• Supports both standard SPI and transformer-isolated daisy chain communication protocols
• Compliant with ISO 26262 standards up to ASIL D safety capability

Applications

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

Procurement Notes

Verify the exact suffix against official NXP documentation to confirm pinout and feature variations. Ensure compatibility with the intended MCU interface, specifically checking support for either standard SPI or the Transformer Protocol Link (TPL) daisy chain architecture required for multi-device stacks.

Selection Notes

Select this component for high-precision battery management requiring up to 14 cell channels. It is suitable for applications needing integrated current sensing with ±0.5% accuracy and robust fault protection including OV/UV, OT/UT, and OC verification. Consider the AEC-Q100 qualification if automotive reliability is mandatory.

Part Context

This part belongs to the MC33771C series of battery cell controllers from NXP Semiconductors. It is often paired with gateway chips like the MC33664 or MC33665 for TPL communication. The 'A' in the suffix typically denotes specific package or tape-and-reel configurations compared to other variants in the family.

Replacement Considerations

MC33771CTA1AE

FAQ

What communication interfaces does the MC33771ATA1AE support?

It supports standard SPI communication as well as a 2-wire twisted pair differential isolated daisy chain communication using the Transformer Protocol Link (TPL) when used with compatible gateway devices.

Does the MC33771ATA1AE include current measurement capabilities?

Yes, it features an integrated current sensor with a Programmable Gain Amplifier (PGA) offering ±0.5% accuracy from milliamps to kiloamps, along with an integrated coulomb counter.