MC33771BSP2AE

Overview

The MC33771BSP2AE is a 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 up to 75 V transients. The device features advanced voltage and temperature measurement with a maximum total stack voltage error of 0.8 mV. It integrates an onboard passive balancing MOSFET capable of 300 mA current. Communication is supported via standard SPI or transformer-isolated daisy chain at speeds up to 4 Mbps. The component complies with AEC-Q100 standards and supports ISO 26262 functional safety up to ASIL D.

Feature Summary

• Integrates 14 differential cell voltage measurement channels and synchronized current sensing with integrated coulomb counting.
• Supports isolated daisy chain communication using the MC33664 transceiver or standard SPI interfaces for MCU connectivity.
• Features embedded 300mA passive balancing transistors with programmable timers and comprehensive fault diagnostics.
• Complies with ISO 26262 functional safety standards, offering ASIL D capability for high-reliability battery management systems.

Applications

• Hybrid Electric Vehicle (HEV) battery packs
• Electric Vehicle (EV) high-voltage battery systems
• Energy Storage Systems (ESS)
• Uninterruptible Power Supply (UPS) units

Procurement Notes

Verify the specific suffix 'S' in the part number MC33771BSP2AE against official NXP documentation to confirm package type and tape/reel specifications. Ensure compatibility with the intended PCB footprint, as LQFP-EP-64 variants exist. Confirm that the selected variant meets the required AEC-Q100 qualification grade for the target automotive or industrial environment before finalizing procurement.

Selection Notes

Select this controller when designing systems requiring up to 14 series-connected lithium-ion cells. It is suitable for applications demanding high precision voltage measurement and integrated passive balancing. Consider the MC33664 transceiver if transformer-isolated daisy chain communication is required for multi-node scalability. Ensure the system design accommodates the 9.6 V to 61.6 V operating voltage range and supports the necessary SPI or TPL interface protocols.

Part Context

The MC33771B series belongs to NXP's SafeAssure portfolio, providing long-term supply availability for critical infrastructure. It is part of a broader BMS ecosystem that includes the MC33664 transceiver and MPC5xxx microcontrollers. This family is engineered to reduce bill-of-materials costs while maintaining high functional safety integrity for electric mobility and grid storage applications.

Replacement Considerations

The MC33771CTP2AE is a documented alternative within the same product family, offering similar channel counts and functionality. Verify pinout compatibility and software configuration requirements when substituting between B and C series variants. Consult NXP documentation for specific differences in packaging or thermal characteristics.