The BQ25798RQMR is an I²C-controlled buck-boost battery charger from Texas Instruments (TI), designed for 1- to 4-cell lithium-ion and lithium-polymer batteries with a charging current of up to 5A. It integrates switching MOSFETs, a battery FET, and current-sensing circuits, while supporting USB Power Delivery 3.0 profiles for flexible power and battery charging management.
The BQ25798RQMR features maximum power point tracking (MPPT) for solar photovoltaic inputs, dual-input selection, power path management, and USB On-The-Go (OTG) functionality. Its integrated 16-bit ADC supports voltage, current, and temperature monitoring. Housed in a 29-pin VQFN-HR package, this device is suitable for portable electronics, solar-powered equipment, industrial embedded systems, and multi-cell lithium battery charging applications.






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