RT9501B

Preliminary RT9501A/B Advanced Lithium-Ion Linear Battery Charger General Description The RT9501 is a single Lithium-Ion or Lithium-Polymer cell linear battery charger which is designed for compact and cost-sensitive handheld devices. It combines charge status indication, charge termination, battery temperature monitoring, and high accuracy current and voltage regulation in a MSOP-8 package. www.DataSheet4U.com The RT9501 charges the battery in three modes, precharge, constant current, constant voltage. If the battery voltage is below the precharge threshold VO(MIN), the RT9501 precharges the battery with a lower conditioning current. After precharge, the RT9501 applies a constant current to the battery. An external senseresister sets the charge current. The constant voltage mode continues until the battery reaches the regulation voltage. The battery temperature is continuously measured by an external thermistor through the TS pin. The RT9501 inhibits charge until the temperature is within the range defined by users. Features z For Single Lithium-Ion or Lithium-Polymer Cell Battery Pack (4.1V or 4.2V) A Few External Components are Required Precharge, Constant Current, Constant Voltage Modes Battery Temperature Monitor Charge Status Indication Automatic Battery Recharge Charge Termination Detect Auto Low Power Sleep Mode when VDD Power is Removed MSOP-8 Package RoHS Compliant and 100% Lead (Pb)-Free z z z z z z z z z Applications z z z z Digital Cameras PDAs Cellular ...