MC33775ATA1AE

Overview

The MC33775ATA1AE is a 14-channel lithium-ion battery cell controller IC designed for automotive and industrial applications. It supports 4 to 14 cells per device with an operating supply voltage range of 9 V to 65 V and a maximum transient rating of 75 V. The component features ASIL D support for cell, module, and temperature measurements. It includes onboard passive cell balancing with up to 300 mA balancing MOSFETs and diagnostics. Communication interfaces include SPI and isolated daisy chain. The device operates within a temperature range of -40°C to +125°C and is housed in an LQFP-64 package.

Feature Summary

• Provides ISO 26262 ASIL D functional safety support for high-precision cell voltage, module voltage, and temperature measurements.
• Integrates onboard passive cell balancing capabilities with up to 300 mA balancing MOSFETs and comprehensive diagnostic functions.
• Supports communication via Serial Peripheral Interface (SPI) and isolated daisy chain interfaces for connection to host microcontrollers.

Applications

• Hybrid electric vehicles (HEV)
• Electric vehicles (EV)
• Energy storage systems (ESS)

Procurement Notes

Verify the specific suffix 'A1AE' against official NXP documentation to confirm pinout, packaging, and revision details. Confirm end-of-life status as indicated by distributor data. Ensure compatibility with required isolation barriers for daisy chain communication. Validate thermal management requirements for the LQFP-64 package under maximum load conditions.

Selection Notes

Select this component when a 14-channel solution with ASIL D certification is required for high-voltage battery stacks. Compare measurement accuracy and balancing current limits against alternatives like the MC33774 if higher channel counts are needed. Verify that the 9 V to 65 V supply range aligns with the system's power architecture. Ensure the host MCU supports the necessary SPI or isolated daisy chain protocols.

Part Context

The MC33775A belongs to the NXP MC3377x series of battery junction box controllers. This family targets advanced battery management systems requiring high reliability and safety integrity. The device complements other series members like the MC33771 and MC33774, offering specific channel counts and balancing features tailored for different stack configurations in automotive and industrial energy storage.

Replacement Considerations

Public confirmed substitute part numbers: None identified in provided documentation.