MC33771BSA1AE

Overview

The MC33771BSA1AE 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 up to 75 V transients. The device integrates ADC conversions for differential cell voltages and currents, coulomb counting, and temperature measurements. It features embedded balancing transistors with onboard passive cell balancing capabilities. Communication with the MCU is supported via standard SPI or transformer-isolated daisy chain using the MC33664. The component is compliant with MPC5xxx 32-bit MCU families.

Feature Summary

• Integrates advanced voltage and temperature measurement channels with high-precision ADC conversion for accurate state estimation.
• Features embedded low Rdson passive cell balancing MOSFETs with dedicated programmable timers and diagnostic functions.
• Supports isolated daisy chain communication via MC33664 or direct SPI interface for scalable system architecture.
• Provides comprehensive fault verification including OV/UV, OT/UT, and OC detection with sleep mode monitoring capabilities.

Applications

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

Procurement Notes

Verify the specific suffix 'SA1AE' against official NXP documentation to confirm package type and tape/reel specifications. Ensure compatibility with the intended microcontroller family, such as MPC5xxx. Confirm that the design supports the required isolation topology if utilizing the daisy chain feature with MC33664. Check for any non-disclosure agreement requirements for detailed safety manuals or application hints.

Selection Notes

Select this component for high-voltage battery management systems requiring 14 channels. It is suitable for designs needing integrated current sensing and coulomb counting without external complex circuitry. Consider the ASIL D safety capability for automotive applications. Evaluate the trade-off between SPI and isolated daisy chain based on wiring complexity and noise immunity requirements in the target environment.

Part Context

This part belongs to the MC33771 series of Li-ion battery cell controllers from NXP Semiconductors. The series includes variants like MC33771B and MC33771C, which differ in features such as averaging capabilities and node limits in daisy chain configurations. The MC33771BSA1AE specifically targets applications requiring robust diagnostics and high channel counts for large battery packs.

Replacement Considerations

MC33771BTA1AE is a comparable variant within the same series. Verify pinout compatibility and functional differences, such as daisy chain node limits or averaging features, before substitution. Consult official cross-reference data for exact electrical parameter matching.

FAQ

Does the MC33771BSA1AE support passive balancing during sleep mode?

Yes, the device supports balancing in sleep mode with programmable balancing timers for each MOSFET.

What communication interfaces are supported by this IC?

It supports standard SPI and transformer-isolated daisy chain communication when used with the MC33664 transceiver.

Is the MC33771BSA1AE compatible with AEC Q-100 standards?

Yes, the MC33771 series supports hot plug capabilities and is compliant with AEC Q-100 standards.