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The proposed design is a battery-powered wearable device that integrates advanced sensing and power management features. The system operates primarily from a single-cell Li-ion battery (3.7 V nominal) and includes a USB Type-C interface for charging and external power supply.
The device uses a battery charger with power-path management ( BQ24075) to ensure seamless operation:
When USB power is connected, the system is powered directly from the USB input while simultaneously charging the battery. When USB is disconnected, the system automatically switches to battery power without interruption. A fuel gauge IC monitors battery health parameters such as voltage, state of charge (SOC), and remaining capacity, reporting these to the microcontroller via I²C.
The system includes an electrochemical front end (AD5941) with a 16-bit ADC for high-precision sensor measurements.
Could you please review the attached schematic.
The device uses a battery charger with power-path management ( BQ24075) to ensure seamless operation:
When USB power is connected, the system is powered directly from the USB input while simultaneously charging the battery. When USB is disconnected, the system automatically switches to battery power without interruption. A fuel gauge IC monitors battery health parameters such as voltage, state of charge (SOC), and remaining capacity, reporting these to the microcontroller via I²C.
The system includes an electrochemical front end (AD5941) with a 16-bit ADC for high-precision sensor measurements.
Could you please review the attached schematic.
