The RT9501BGF is an advanced lithium-ion linear Battery Charger 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. This charges the battery in three modes, precharge, constant current, constant voltage. If the battery voltage is below the precharge threshold VO(MIN), it precharges the battery with a lower conditioning current. After precharge, the charger applies a constant current to the battery. An external sense-resister sets the charge current. The constant voltage mode continues until the battery reaches the regulation voltage.
- 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
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