MC33772BSA2AE

Overview

The MC33772BSA2AE is a six-channel lithium-ion battery cell controller IC manufactured by NXP Semiconductors. It operates within a supply voltage range of 6V to 30V with 40V transient tolerance and supports up to 4Mbps SPI communication. The device features six battery voltage measurement channels, seven ADC/GPIO/temperature sensor inputs, and integrated passive balancing MOSFETs rated at 300mA. It includes an onboard coulomb counter and current measurement capabilities with ±0.5% accuracy. The component is housed in a 48-pin LQFP package, complies with AEC-Q100 standards, and supports ISO 26262 functional safety requirements.

Feature Summary

• Supports isolated transformer physical layer (TPL) daisy chain or standard SPI communication interfaces for reliable data transfer.
• Integrates onboard low Rdson passive cell balancing MOSFETs with programmable timers and diagnostic functions.
• Provides synchronized advanced current measurement with integrated PGA and built-in coulomb counting.
• Features comprehensive fault verification including OV/UV, OT/UT, and OC detection with sleep mode monitoring.

Applications

• Hybrid electric vehicle (HEV) and electric vehicle (EV) high-voltage battery management systems
• Industrial energy storage systems (ESS)
• Uninterruptible power supply (UPS) systems

Procurement Notes

Verify the specific suffix 'SA2' against official NXP documentation to confirm pinout and feature configuration differences from other variants like 'CTA'. Ensure compatibility with the target microcontroller's SPI interface speed and voltage levels. Confirm that the LQFP-48 package meets the thermal and mechanical constraints of the final assembly design.

Selection Notes

Select this model when a six-channel architecture is required for automotive-grade applications needing ASIL D support. Choose over the MC33772C variant if the application does not require the enhanced TPL topology features such as ringback support or higher node counts. Ensure the system design accommodates the necessary isolation components for the chosen communication interface.

Part Context

This component belongs to the MC33772 series of battery cell controllers designed for high-reliability environments. It serves as a core element in modern battery management architectures, providing precise cell monitoring and protection. The device is part of NXP's portfolio aimed at simplifying BMS design through integrated diagnostics and safety features compliant with automotive standards.

Replacement Considerations

The MC33772CTA2AE is a related variant within the same family. Verify if the specific communication interface requirements (SPI vs TPL) and topology needs match the replacement part's capabilities before substitution.

FAQ

Does the MC33772BSA2AE support transformer-based daisy chain communication?

Yes, the MC33772B series supports isolated transformer physical layer (TPL) daisy chain communication via the MC33664 interface chip, in addition to standard SPI.

What is the maximum total voltage measurement error specified for this device?

The device specifies a maximum total stack voltage measurement error of 0.8 mV.