MC33771CTP1AER2

Overview

The MC33771CTP1AER2 is a 14-channel lithium-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 passive balancing MOSFETs capable of 300 mA current. It supports isolated daisy-chain communication at 2 Mbps or standard SPI at 4 Mbps, accommodating up to 63 nodes in a chain. The component includes an integrated coulomb counter, temperature sensors, and comprehensive fault diagnostics.

Feature Summary

• Supports simultaneous voltage and current measurement with integrated coulomb counting for accurate state estimation.
• Features onboard passive cell balancing with programmable timers and diagnostic capabilities.
• Enables robust system architecture through isolated daisy-chain communication with loopback support.
• Provides advanced fault detection including over-voltage, under-voltage, over-temperature, and short-circuit monitoring.

Applications

• High-voltage battery management systems for electric vehicles
• Hybrid electric vehicle energy storage architectures
• Industrial energy storage systems requiring high reliability
• Uninterruptible power supply (UPS) battery monitoring

Procurement Notes

Verify the specific ordering suffix against the manufacturer's official documentation to ensure correct package type and reel configuration. Confirm that the requested variant matches the required safety certification level and communication interface specifications for the target application environment before finalizing procurement orders.

Selection Notes

Select this component when designing systems requiring precise synchronization between cell voltage and current measurements. It is suitable for applications demanding high node counts in daisy-chain topologies. Ensure the design accommodates the specified operating voltage range and thermal requirements for the intended automotive or industrial deployment scenario.

Part Context

This part belongs to the MC33771 series of battery cell controllers from NXP Semiconductors. It serves as an analog front-end for managing multiple lithium-ion cells in series. The device simplifies BMS design by integrating measurement, balancing, and communication interfaces into a single chip, reducing component count and board space requirements.

Replacement Considerations

The MC33771C is the functional equivalent within the series. Verify pinout compatibility and software register mapping if substituting between variants. Check datasheets for differences in averaging capabilities and maximum node limits in daisy-chain configurations.

FAQ

What is the maximum number of nodes supported in a daisy-chain configuration?

The device supports up to 63 nodes in one isolated daisy chain when used with compatible transceivers.

Does the MC33771CTP1AER2 support simultaneous voltage and current sampling?

Yes, it features synchronized measurement capabilities for both cell voltages and currents via its integrated coulomb counter.

What communication interfaces are available for this component?

It supports standard SPI communication at 4 Mbps and isolated daisy-chain communication at 2 Mbps using twisted pair differential signaling.