MC33771CTP1AE

Overview

The MC33771CTP1AE 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 with averaging up to 256 samples, integrated current sensing with ±0.5% accuracy, coulomb counting, and temperature measurements. It includes onboard passive balancing MOSFETs rated at 300 mA. Communication is supported via standard SPI or transformer-isolated daisy chain (TPL) using MC33664, allowing up to 63 nodes per chain with loopback support. The component is housed in an LQFP-EP-64 package and complies with AEC-Q100 standards.

Feature Summary

• Supports advanced voltage and temperature measurement with integrated averaging for up to 256 samples across 14 channels.
• Features synchronized high-precision current measurement with integrated coulomb counter and programmable passive cell balancing.
• Enables isolated daisy chain communication via TPL with loopback capability or standard SPI interface for MCU control.

Applications

• Hybrid Electric Vehicle (HEV) Battery Management Systems
• Electric Vehicle (EV) High-Voltage Battery Management Systems
• Energy Storage Systems (ESS)
• Uninterruptible Power Supply (UPS) Systems

Procurement Notes

Verify the specific suffix TP1AE against official NXP documentation to confirm package type and tape-and-reel configuration. Ensure compatibility with the intended microcontroller interface, specifically regarding TPL versus SPI requirements. Confirm that the application design accounts for the AEC-Q100 qualification and ASIL D safety capabilities if functional safety is required. Cross-reference the ordering part number with the latest datasheet revision to avoid discrepancies in pinout or feature sets.

Selection Notes

Select this component when 14-cell monitoring with high-precision averaging and integrated coulomb counting is required. It is suitable for applications needing robust isolation via transformer-coupled daisy chains with loopback diagnostics. Consider the MC33771BTA1AE if only 15-node daisy chain support without averaging or loopback is sufficient. Ensure the system voltage remains within the 9.6 V to 61.6 V operational range. Evaluate thermal management needs given the LQFP-EP-64 package and onboard balancing currents.

Part Context

The MC33771C series serves as a premium battery cell controller within NXP's portfolio, targeting high-performance BMS architectures. It complements communication gateways like the MC33664 and MC33665A. The device integrates analog front-end capabilities with digital processing interfaces, enabling complex battery monitoring tasks. It is part of a broader ecosystem including evaluation boards and software drivers for rapid development in automotive and industrial energy storage sectors.

Replacement Considerations

MC33771BTA1AE

FAQ

What is the maximum number of nodes supported in a daisy chain configuration?

The MC33771CTP1AE supports up to 63 nodes in one daisy chain when used with transformer-isolated communication.

Does this device support loopback functionality?

Yes, the MC33771CTP1AE includes loopback support for one daisy chain, which aids in diagnostic verification.

What is the accuracy of the integrated current sensor?

The integrated current sensor with PGA offers an accuracy of ±0.5% from milliamps to kiloamps.