MAX17320G22+

Overview

The MAX17320G22+ is a standalone battery pack fuel gauge IC designed for 2S to 4S lithium-ion or polymer battery configurations. It integrates the ModelGauge m5 algorithm to provide accurate State of Charge (SoC) readings with an operating supply current of 38 µA. The device supports SHA-256 authentication and includes built-in protection features such as over-current, over-temperature, over/under-voltage, and short-circuit detection. It operates within a temperature range of -40°C to +85°C and utilizes an I2C interface.

Feature Summary

• Integrates ModelGauge m5 algorithm for precise state-of-charge estimation in multi-cell packs
• Includes comprehensive fault protection mechanisms against electrical anomalies
• Supports SHA-256 authentication for secure battery identification
• Features low power consumption suitable for energy-constrained applications

Applications

• Industrial equipment battery management
• Automotive electronics systems
• Aerospace instrumentation

Procurement Notes

Verify the exact suffix G22 corresponds to the required package and temperature grade. Confirm that the component is lead-free and RoHS compliant if required by your assembly process. Ensure the I2C address matches your system design. Check for any specific ordering notes regarding the + symbol indicating lead-free status.

Selection Notes

Select this part when high accuracy is needed for 2S to 4S lithium packs without external microcontrollers. The integrated protector function simplifies bill of materials. Consider the 38 µA quiescent current impact on standby life. Verify compatibility with the host controller's I2C voltage levels and pull-up requirements.

Part Context

This component belongs to the MAX17320 family of fuel gauges from Maxim Integrated, now part of Analog Devices. It is designed to replace older generation fuel gauges by offering improved accuracy through the ModelGauge m5 algorithm. The G22 suffix typically denotes a specific package variant, often QFN, optimized for space-constrained PCB layouts.

Replacement Considerations

Direct substitutes may include other MAX17320 variants with different suffixes for package or temperature variations. Cross-reference pinouts and I2C addresses carefully. Ensure replacement parts support the same cell count range and authentication requirements.