MC33772BTB1AE

Overview

The MC33772BTB1AE is a six-channel lithium-ion battery cell controller IC from NXP Semiconductors, designed for automotive and industrial applications. It operates within a supply voltage range of 5 V to 30 V and supports transient voltages up to 42 V. The device features six dedicated battery voltage measurement channels with a maximum total stack voltage measurement error of 0.8 mV. It includes seven ADC/GPIO/temperature sensor inputs and integrated current sensing with programmable gain amplifiers. Communication is supported via isolated 2-wire differential TPL at 2.0 Mbps or SPI at 4 Mbps. The component is housed in an LQFP-48 package.

Feature Summary

• Integrated passive balancing with onboard 300 mA low Rdson MOSFETs and diagnostic capabilities
• Supports ISO 26262 functional safety standards with ASIL D capability
• Synchronized advanced current measurement with integrated coulomb counter
• Hot-plug capable design compliant with AEC-Q100 standards

Applications

• Hybrid electric vehicle (HEV) and electric vehicle (EV) battery management systems
• Energy storage systems (ESS)
• Uninterruptible power supply (UPS) systems
• High-voltage battery packs for automotive applications

Procurement Notes

Verify the specific suffix 'BTB1AE' against official NXP documentation to confirm pinout, communication interface configuration, and packaging details. Confirm end-of-life status as distributor data indicates obsolescence. Ensure compliance with RoHS and REACH requirements by checking the Certificate of Analysis. Validate that the LQFP-48 package matches your PCB footprint and thermal design constraints before finalizing procurement.

Selection Notes

Select this component for applications requiring precise voltage monitoring across six cells with integrated balancing. The choice between TPL and SPI communication should depend on system isolation requirements and MCU compatibility. Consider the operating temperature range of -40 C to +125 C for harsh environments. Verify that the 5 V to 30 V supply range aligns with the system's power architecture and transient voltage expectations.

Part Context

The MC33772B series belongs to NXP's portfolio of battery management ICs tailored for high-reliability automotive and industrial sectors. It complements other devices like the MC33771 for higher channel counts. The BTB1AE variant specifically denotes the LQFP-48 package and basic communication configuration within the broader MC33772 family, focusing on efficient cell monitoring and protection.

Replacement Considerations

Check for active successors such as the MC33772C series variants. Verify pin-to-pin compatibility and software register mapping if migrating to newer revisions. Consult NXP sales for availability of long-term supply agreements if replacing an obsolete part.

FAQ

What is the maximum total voltage measurement error for the MC33772BTB1AE?

The maximum total stack voltage measurement error is specified as 0.8 mV.

Does the MC33772BTB1AE support hot-plugging?

Yes, the device is designed to be hot-plug capable.

What communication interfaces are supported by this IC?

It supports isolated 2-wire differential TPL communication at 2.0 Mbps and SPI communication at 4 Mbps.