MAX17823BGCB+

Overview

The MAX17823BGCB+ is a high-voltage battery stack monitor and data acquisition system (DAS) designed for automotive applications. It integrates a 12-bit successive approximation register (SAR) analog-to-digital converter (ADC) capable of measuring up to 12 cell voltages and two temperatures simultaneously. The device supports a wide operating voltage range from 9V to 65V, enabling it to manage battery stacks with up to 384 cells when daisy-chained with up to 32 units. Key features include internal balancing switches, comprehensive diagnostic capabilities, and communication via a dedicated battery management UART protocol.

Feature Summary

• Integrates a 12-bit SAR ADC for simultaneous multi-channel voltage and temperature measurement within a single package.
• Supports daisy-chain connectivity for up to 32 devices to manage extensive high-voltage battery architectures.
• Includes built-in diagnostic functions and thermal protection mechanisms to ensure system safety and reliability.
• Features internal balancing switches and low-power standby modes optimized for electric vehicle power management.

Applications

• Electric Vehicle (EV) Battery Management Systems
• Hybrid Electric Vehicle (HEV) High-Voltage Battery Packs
• Uninterruptible Power Supply (UPS) Battery Backup Systems
• High-Voltage Battery Modules in Energy Storage Applications

Procurement Notes

Verify the specific suffix 'BGCB' against official Analog Devices documentation to confirm pinout compatibility and temperature grade specifications. Confirm current availability status as supply constraints may affect lead times. Ensure that the selected variant meets the required AEC-Q100 qualification level for your target automotive application environment.

Selection Notes

Select this component when designing systems requiring precise monitoring of large battery stacks with integrated balancing capabilities. Consider the 64-LQFP package size and thermal performance requirements for your PCB layout. Evaluate the need for daisy-chain communication interfaces and ensure the host microcontroller supports the required UART protocol for efficient data retrieval and control.

Part Context

This part belongs to the MAX1782x family of battery stack monitors from Maxim Integrated, now part of Analog Devices. These devices are specifically engineered for high-voltage applications, offering a consolidated solution for cell voltage sensing, temperature monitoring, and passive balancing. The family addresses the complexity of managing numerous series-connected cells in modern electrified vehicles and industrial energy storage systems.

Replacement Considerations

Direct substitutes within the same family include the MAX17823AGCB+ and MAX17823HGCB+. Verify functional equivalence regarding channel count, accuracy, and interface protocols before substitution. Cross-reference with competitor parts like LTC68xx series if architectural differences are acceptable for the design.

FAQ

What is the maximum number of cells that can be managed by a single MAX17823 device?

A single MAX17823 device can directly measure up to 12 cell voltages. However, by daisy-chaining up to 32 devices, the system can manage a total of 384 battery cells.

Does the MAX17823 support active or passive cell balancing?

The MAX17823 includes internal switches for passive cell balancing, allowing charge equalization across the battery cells without external components.