MC33771BSP1AER2

Overview

The MC33771BSP1AER2 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, with transient tolerance up to 75 V. The device features integrated ADC conversions for differential cell voltages and currents, coulomb counting, and temperature measurements. It supports standard SPI and transformer-isolated daisy chain communication via the MC33664 transceiver. The component includes onboard passive balancing MOSFETs rated at 300 mA and provides comprehensive diagnostic functions. It complies with ISO 26262 standards, supporting ASIL D safety capabilities, and is AEC-Q100 qualified.

Feature Summary

• Integrated high-precision ADC for simultaneous measurement of differential cell voltages, stack voltage, and current with coulomb counting.
• Onboard passive balancing capability using low Rdson MOSFETs with dedicated programmable timers and diagnostics.
• Supports isolated daisy chain communication (TPL) with MC33664 or standard SPI interfaces for MCU connectivity.
• Comprehensive fault detection including OV/UV, OT/UT, and OC verification with sleep mode monitoring.

Applications

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

Procurement Notes

Verify the specific suffix 'R2' against official NXP documentation to confirm reel packaging specifications. Ensure compatibility with the required communication protocol (SPI vs. TPL) and MCU interface. Confirm that the ASIL D safety classification meets the target system's functional safety requirements before finalizing procurement.

Selection Notes

Select this component for high-voltage battery management systems requiring advanced cell balancing and precise state-of-charge estimation. It is suitable for designs needing robust isolation and high functional safety integrity. Consider the MC33664 transceiver if transformer-based isolation is required for the communication network.

Part Context

This part belongs to the MC33771 family of lithium-ion battery controllers from NXP Semiconductors. It is specifically engineered for demanding automotive and industrial environments where reliability and safety are critical. The device integrates power management and signal conditioning functions into a single LQFP-64 package.

Replacement Considerations

MC33771C variants offer similar functionality but may differ in qualification levels. For lower channel counts, consider the MC33772 series. Verify pinout and software compatibility when substituting with other BMS controllers.

FAQ

Does the MC33771 support hot-plugging?

Yes, the device supports hot-plugging capabilities as documented in its specifications.

What is the maximum balancing current?

The onboard passive balancing MOSFETs support a maximum current of 300 mA per channel.