RT9505A

Pinout




Description

The RT9505A is a fully integrated low cost single-cell Li-Ion battery charger IC ideal for portable applications. The RT9505A is capable of being powered up from AC adapter. The RT9505A enters sleep mode when AC adapter is removed.
The RT9505A 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 1.2A with an external resister. The internal thermal feedback circuitry regulates the die temperature to optimize the charge rate for all ambient temperatures.
The RT9505A features 18V maximum rating voltages for AC adapter. The other features are under voltage protection, over voltage protection for AC adapter supply and battery temperature monitoring.