RT9519 Datasheet | Richtek

Description The RT9519 is an integrated single-cell Li-ion battery charger with auto power path management (APPM). No external MOSFETs are required. The RT9519 enters sleep mode when power is removed. Charging tasks are optimized by using a control algorithm to vary the charge rate, including pre-charge mode, fast charge mode and constant voltage mode. For the RT9519, the charge current can also be programmed with an external resistor and modified with an external GPIO. The scope that the battery regulation voltage can be modified with an external GPIO depends on the battery temperature. The internal thermal feedback circuitry regulates the die temperature to optimize the charge rate for all ambient temperatures. The charging task will always be terminated in constant voltage mode when the charging current reduces to the termination current of 10% x ICHG_FAST. Other features include under voltage protection and over voltage protection for VIN supply. The remended junction temperature range spans from - 40C to 125C, while the ambient temperature range extends from - 40C to 85C. Ordering Information RT9519 Package Type QW : WQFN-20L 3x3 (W-Type) Lead Plating System G : Richtek Green Policy pliant Note: Richtek products are Richtek Green Policy pliant and patible with the current requirements of IPC/JEDEC J-STD-020. Marking Information JE=YM DNN JE= : Product Code YMDNN : Date Code Features - 28V Maximum Rating for VIN Power - Selectable Power Current Limit (0.1A / 0.5A / 1.5A) - Integrated Power MOSFETs - Auto Power Path Management (APPM) - Battery Charging Current Control - Battery Regulation Voltage Control - Voltage Detector by VDET and RESET Pin - Programmable Charging Current and Safe Charge Timer - Under Voltage Protection, Over Voltage Protection - Power Good and Charge Status Indicator - Optimized Charge Rate via Thermal Feedback - Thin 20-Lead WQFN Package - Ro HS pliant and Halogen Free Applications - Digital Cameras - PDAs and Smart Phones - Portable...