MC33771BSP1AE

Overview

The MC33771BSP1AE 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 transients up to 75 V. The device features 14 differential cell voltage measurement channels with a maximum total stack voltage measurement error of 0.8 mV. It includes an integrated current sensor with PGA offering ±0.5% accuracy from milliamps to kiloamps, alongside an onboard coulomb counter. Communication is supported via standard SPI or transformer-isolated daisy chain using the MC33664. The component is housed in a QFP-64 package.

Feature Summary

• Advanced voltage and temperature measurement capabilities with high precision ADC conversions for differential cell voltages and currents.
• Integrated passive balancing transistors supporting up to 300 mA with programmable timers and dedicated diagnostic functions.
• Robust communication interfaces including 4 Mbps SPI and 2.0 Mbps isolated daisy chain for scalable system architecture.
• Comprehensive fault verification and monitoring for over-voltage, under-voltage, over-temperature, and over-current conditions.

Applications

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

Procurement Notes

Verify the specific suffix BSP1AE against official NXP documentation to confirm packaging details and moisture sensitivity levels. Ensure compliance with ISO 26262 requirements if targeting ASIL D functional safety goals. Confirm compatibility with MPC5xxx 32-bit MCU families for intended processing and control integration. Review non-disclosure agreement requirements for detailed datasheets and safety manuals prior to design implementation.

Selection Notes

Select this component for high-voltage battery management systems requiring extensive channel count and precise measurement accuracy. The MC33771BSP1AE is suitable for designs needing both SPI and isolated daisy chain flexibility. Consider its ASIL D capability for safety-critical automotive applications. Evaluate the need for onboard balancing and coulomb counting to reduce external component count and simplify board layout.

Part Context

The MC33771 series serves as a core component in NXP's SafeAssure battery management solutions. It complements the MC33664 transformer driver for isolated communication networks. This controller enables scalable architectures supporting up to 210 logical units in a single daisy chain. It is part of NXP's long-term product availability plan, ensuring stability for embedded designs in electrification sectors.

FAQ

Does the MC33771BSP1AE support balancing during sleep mode?

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

What is the maximum transient voltage the device can withstand?

The device supports operation up to 61.6 V with transient voltage handling up to 75 V.