MAX6431EIUS+

Overview

The MAX6431EIUS+ is a low battery monitor IC from Analog Devices Inc./Maxim Integrated, designed for multi-chemistry battery systems. It features a fixed, two-channel architecture implemented in BICMOS technology within a SOT143-4 package. The device passively monitors individual cell voltages through ADC conversion without active balancing circuitry. Its internal comparator tracks cell voltages with a typical accuracy of ±20mV, enabling the detection of overvoltage or undervoltage conditions essential for battery management.

Feature Summary

• Passive voltage monitoring via ADC conversion
• Internal comparator with ±20mV typical accuracy
• Two-channel fixed architecture
• Multi-chemistry battery support

Applications

• Battery management systems requiring passive cell monitoring
• Network applications needing stable signal processing
• Low power consumption battery monitoring circuits

Procurement Notes

Verify the manufacturer designation as Analog Devices Inc./Maxim Integrated when sourcing. Confirm the package type is SOT143-4 and the description matches 'IC BAT MON MULT-CHEM 2C'. Ensure the part number suffix '+T' or standard variant aligns with specific reel or bulk requirements if applicable, though documentation primarily lists the base part. Cross-reference datasheets to confirm the absence of active balancing features.

Selection Notes

Select this component for applications requiring passive, multi-chemistry battery cell voltage monitoring. It is suitable where active cell balancing is not required, relying instead on external management for charge equalization. The ±20mV accuracy supports precise overvoltage and undervoltage detection. Consider the SOT143-4 package constraints and the fixed two-channel limitation during system design.

Part Context

This component belongs to the Power Management Circuits category, specifically under Battery Management ICs. It is manufactured by Maxim Integrated, now part of Analog Devices Inc. The device serves as a dedicated monitor for battery stacks, distinguishing itself by focusing on voltage tracking rather than active charging or balancing control.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided source material. Verify compatibility with existing board layouts and software drivers before considering alternative components.