RT9505

Conceptual RT9505 Fully Integrated Linear Single Cell Li-Ion Battery Charger for Portable Applications General Description The RT9505 is a fully integrated low cost single-cell LiIon battery charger ideal for portable applications. The RT9505 is capable of being powered up from AC adapter inputs. The RT9505 enters sleep mode when supplies is removed. The RT9505 optimizes the charging task by using a control algorithm including preconditioning mode, fast charge mode and constant voltage mode. The charging task is terminated as the charge current drops below the preset threshold. The AC adapter charge current can be programmed up to 1A with an external resister. The internal thermal feedback circuitry regulates the die temperature to optimize the charge rate for all ambient temperatures. The RT9505 features 18V and 7V maximum rating voltages for AC adapter. The other features are under voltage protection, over voltage protection for AC adapter supply, battery temperature monitoring, power supply status indicators and charge status indicator. Features z Automatic Input Supplies Selection z 18V Maximum Rating for AC Adapter z Internal Integrated Power FETs z AC Adapter Power Good Status Indicator z Charge Status Indicator z Under Voltage Protection z Over Voltage Protection z Automatic Recharge Feature z Battery Temperature Monitoring z Small 10-Lead WDFN Package z Thermal Feedback Optimizing Charge Rate Applications z Digital Cameras z Cellular Phones z Personal Data Assista...