bq25700A Buck-Boost Charge Controller

Texas Instruments bq25700A Buck-Boost Charge Controller offers a low component count, high-efficiency solution for space-constraint, multi-chemistry battery charging applications. The NVDC-1 configuration allows the system to be regulated at battery voltage, not drop below the minimum voltage. The system keeps operating even when the battery is completely discharged or removed. When load power exceeds the input source rating, the battery goes into supplement mode, preventing the input source from overloading. The bq25700A charges the battery from various input sources, including USB adapters, high voltage USB PD sources, and standard adapters. During power-up, the charger sets the converter to buck, boost, or buck-boost configuration based on the input source and battery conditions. The charger automatically transits among buck, boost, and buck-boost configurations without host control.