MC33771BTB1AER2

Overview

The MC33771BTB1AER2 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 features 14 differential voltage measurement channels with a maximum total stack voltage measurement error of 0.8 mV. It integrates an advanced current sensor with PGA offering ±0.5% accuracy, a coulomb counter, and seven ADC/GPIO/temperature sensor inputs. Onboard passive balancing utilizes 300 mA low Rdson MOSFETs. Communication is supported via standard SPI or transformer-isolated daisy chain using the MC33664.

Feature Summary

• Integrates high-precision ADC conversions for differential cell voltages, currents, and temperature measurements alongside a synchronized coulomb counter.
• Features embedded 300 mA passive balancing transistors with dedicated timers and comprehensive diagnostic capabilities to simplify application design.
• Supports isolated daisy chain communication via MC33664 or standard SPI interfaces for robust data processing and control by microcontrollers.

Applications

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

Procurement Notes

Verify the specific suffix 'R2' indicates reel packaging against official NXP documentation. Confirm RoHS compliance status through the manufacturer's datasheet. Ensure compatibility with MPC5xxx 32-bit MCU families as specified in the technical reference manual. Validate that the LQFP64 package matches your PCB footprint requirements before finalizing procurement.

Selection Notes

Select this component for designs requiring up to 14 series cells per controller node. It is suitable for applications demanding ISO 26262 ASIL D safety capability. Consider the integrated current sensing and balancing features if minimizing external component count is a priority. Ensure the system architecture supports either SPI or transformer-isolated daisy chain communication protocols.

Part Context

This part belongs to the MC33771 family of Li-ion battery cell controllers from NXP Semiconductors. It is specifically engineered for high-voltage battery management systems in electrified vehicles and stationary storage. The device complements the MC33664 transceiver for isolated communication networks.

Replacement Considerations

MC33771BTA1AE is a verified substitute within the same product family.

FAQ

Does the MC33771 support hot-plugging?

Yes, the device supports hot-plug capabilities and complies with AEC Q-100 standards.

What is the maximum transient voltage the device can withstand?

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