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LiteratureAbstract(literatureAbstract=With the development of battery technology and the requirements for electronic products with a longer running time, battery capacity continues to increase. To maintain the existing charging time with increased battery capacity, fast-charging technology is one of the preferred features for smartphones. Existing chargers are divided into linear charger and switching charger. The linear charger is used in small, current-charging applications, such as wearable equipment, because of its lower cost. The linear charger costs less, but the efficiency is also lower, limiting the charging current. The switching charger is used in applications where higher-charging current is required. Texas Instruments is the pioneer of fast-charging devices and has several families of switching chargers that can provide up to 4-A or 5-A current, such as the bq2419x and the bq2589x series. The charging current is limited by the heat generated from the power conversion. The case temperature of the equipment is tied to the user experience, and the temperature inside the case has impact on the life of the electronic products. The power loss must be further reduced to push the boundary of the charging current. This application report focuses on a new system solution called flash charger for smartphone battery charger solution , which can further improve charging efficiency with less power loss so that battery charging with up to 7 A can be achieved.)