MC33771CTA1AE

Overview

The MC33771CTA1AE 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, with transient tolerance up to 75 V. The device features advanced ADC conversions on differential cell voltages with averaging up to 256 samples, integrated current measurement with ±0.5% accuracy, and coulomb counting. It supports standard SPI communication at 4 Mbps or transformer-isolated daisy chain communication via TPL at 2.0 Mbps, allowing up to 63 nodes in one chain. The component includes onboard passive balancing MOSFETs capable of 300 mA and provides a 5 V output at 5 mA.

Feature Summary

• Supports transformer-isolated daisy chain communication with loopback capability for up to 63 nodes
• Features integrated passive balancing transistors with programmable timers and diagnostics
• Provides high-precision synchronized voltage and current measurement with coulomb counting
• Includes comprehensive fault diagnosis and sleep mode monitoring capabilities

Applications

• Hybrid electric vehicle (HEV) battery management systems
• Electric vehicle (EV) high-voltage battery management
• Energy storage systems (ESS)
• Uninterruptible power supply (UPS) systems
• Industrial control applications

Procurement Notes

Verify the specific suffix TA1AE against official NXP documentation to confirm package type and tape/reel specifications. Ensure compatibility with required functional safety standards such as ISO 26262 ASIL D if applicable to your design. Cross-reference the ordering part number with the latest datasheet to avoid confusion with similar variants like MC33771BTA1AE which may lack certain communication features.

Selection Notes

Select this component when designing systems requiring isolated communication between multiple battery nodes. The MC33771CTA1AE is suitable for applications needing up to 14 cell channels and support for transformer-based isolation. Consider the need for loopback functionality and high node counts, which distinguish it from non-C series variants. Evaluate thermal performance and PCB layout requirements for the LQFP-EP-64 package.

Part Context

This part belongs to the MC33771C series of battery cell controllers from NXP Semiconductors. It is specifically engineered for lithium-ion battery management in demanding environments. The C-series variant distinguishes itself by supporting transformer coupling and extended daisy chain lengths compared to other series members. It is often paired with communication gateways like the MC33664 for system integration.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Variants such as MC33771BTA1AE exist but differ in communication capabilities and node limits. Direct replacement requires verification of functional equivalence regarding isolation methods and channel counts.