MM3458

MITSUMI Lithium-ion battery charge control IC MM3458 Lithium-ion battery charge control IC Monolithic IC MM3458 Outline This IC does not require an externally provided sensing resistor or reverse-current protection diode, enabling reductions in the component count and the amount of generated heat. Battery safety is ensured by limiting the charging current and battery voltage when the battery is at high and low temperatures. It conforms to the new PSE law. Features 1. BAT Regulation Voltage 4.2V±30mV(0.7%) 2. Fast Charge Current 558mA±5% 3. Preliminary current, high-speed charging current, charging completion current can be set using external resistors (maximum charging current is 1.5 A) . 4. A battery temperature detection function is provided via a thermistor, and so the charging voltage and current can be controlled according to the battery temperature. 5. Chip temperature detection enables control of IC temperature rises at high-power charging. The battery can therefo...