PT6104-Multi-Cell Li-ion Battery Pack Charger controller

GENERAL DESCRIPTION
    The PT6104 is an high efficiency, pulse frequency modulated (PFM) switching charger controller for 2 or 4 cell li-ion battery packs. It supports three segments of
charging periods, small current pre-charging, constant current, and constant voltage. By changing topology and external parts, user could apply PT6105 to multiple applications, like having different battery cells, charging current, or switching frequencies. The PT6104 also provides necessary battery charging protections for short circuit, over voltage, ultra low voltage, pre-charge level, fast charge, and over current. Over temperature protection for battery pack is realized through an externally connected thermal resistor. The package of PT6104 is SOP8 Package.

FEATURES
􀁺 Battery plug-in detect: Constant current charge; the fast charge current can be adjust by external resistor.
􀁺 Ultra low battery voltage protect: Using small pre-charge current to protect the battery in ultra low voltage;
􀁺 Normal charge mode: Using the pre-set current to fast charge the battery;
􀁺 Accurate full charge detection by sensing charging current;
􀁺 Protecting functions for over voltage, over current, and ultra low voltage;
􀁺 Battery over temperature protection before and during charging.
􀁺 Charge time protections for pre-charge and fast charge periods;
􀁺 Recharging function: After being fully charged, The battery will be recharged if the battery voltage drops below 3.9v.
􀁺 LEDs indicate different charging states
􀁺 4.5V operating voltage.