MAX17043 Li Battery Fuel Gauge Module with Low Voltage Alarm

Product Parameters Parameters​ ​​Input Voltage:​​ 2.5V-4.5V DC ​​SOC Accuracy:​​ ±1% ​​Standby Current:​​ ≤3μA ​​Communication:​​ I²C/SMBus ​​Alert Function:​​ Programmable Low-Battery Threshold ​​Voltage Measurement:​​ 0V-5V Range ​​Operating Temperature:​​ -40°C to +85°C (Reliable) ​​🔌 Pin Functions ( )​​ ​​VDD:​​ Power Input (2.5V-4.5V DC). Connect directly to battery positive. Parallel ≥0.1μF ceramic capacitor. ​​GND:​​ Power Ground. Share common ground with battery negative and MCU. ​​CELL:​​ Battery Voltage Sense Positive. Connect to battery positive. Keep wire length ≤5cm. ​​CTG:​​ Battery Voltage Sense Negative. Connect to battery negative. Isolate from GND. ​​SDA:​​ I²C Data Line. Requires 4.7kΩ pull-up resistor to VDD. ​​🌟 Key Features​​ ​​High Precision Monitoring:​​ Real-time SOC and voltage tracking with ±1% accuracy using ModelGauge algorithm (no learning cycle required) . ​​Plug-and-Play I²C Interface:​​ Direct digital output compatible with for Arduino/STM32/for Raspberry Pi . ​​Low-Power Alert:​​ ALERT pin triggers interrupt when battery falls below set threshold, reducing MCU polling overhead . ​​Robust Design:​​ Built-in temperature compensation and noise suppression for complex Settings . ​​❓ FAQ​​ 1. ​​SOC Reading Jumps (±5% Fluctuation)?​​ → Add 0.1μF ceramic capacitor close to CELL pin; enable software averaging (read 3 times); avoid reading during high load current swings . 2. ​​ALERT Interrupt Not Triggering?​​ → Verify threshold configuration (e.g., register 0x0C = 0x1A for 10%); check ALERT pull-up resistor; confirm interrupt enable in register 0x0C .

• 【High-Precision Lithium Battery Monitoring】 1% SOC accuracy with ModelGauge algorithm; 2.5V to 4.5V input range; 12.5mV voltage resolution; supports overvoltage protection and real-time power status display
• 【Low-Power Design for Extended Battery Life】 Less than 3µA standby current; 72-hour operation with 2000mAh battery; Suitable for portable and low-power applications
• 【I²C/SMBus Compatible for Easy Integration】 Standard I²C interface (100kHz or 400kHz); compatible with for Arduino, for Raspberry Pi, STM32; plug-and-play digital output without calibration learning
• 【Programmable Low-Battery Alert System】 ALERT pin triggers low-level interrupt when threshold is reached; reduces MCU polling overhead; configurable via register settings
• 【Robust Performance in Harsh Settings】 -40°C to 85°C operating range; built-in noise suppression and temperature compensation; stable performance in complex power supply conditions