High-Efficiency Switehing-Mode Charger System Design Considerations with Dynamic Power Path Management

摘要

End-user demand for fast and efficient charging is continuous and ever-growing. The Lithium-Ion (Li-Ion) battery is desirable because it has very high energy density. These batteries have a high-charge current that works well for 10-inch tablet applications and a high battery pack capacity of more than 6 Ah. Tablets require superior thermal performance and instant turn-on, even with a deeply discharged battery. These requirements present a few technical challenges. First, how to maximize available power from power sources to efficiently and quickly charge the battery while not crashing the power source. Second, how to charge a deeply discharged battery while operating the system simultaneously. Lastly, how to improve thermal performance.