MM1177

MITSUMI Charge and discharge control for coin-type lithium batteries and manganese dioxide lithium batteries MM1177 Charge and discharge control for coin-type lithium batteries and manganese dioxide lithium batteries Monolithic IC MM1177 Outline This IC controls constant current charging and excess discharge for coin-shaped vanadium lithium batteries and manganese dioxide batteries. It performs constant current charging, stops charging at set voltages, and prevents excess discharging. When the voltage falls bellow a set level, it prohibits discharges and reduces IC current consumption nearly to zero. Features During charging 1. Input voltage range 2. Current consumption (during constant current charging) 3. Current consumption (when charging is off) 4. Charging current 5. Charging shut-off voltage (Ta=-20~+70°C) During discharging 1. Discharging shut-off voltage 2. Current consumption (IL-100µA, VBATT=3V) 3. Leak current during discharge shut-off 4. Voltage drop between battery and output (IL=100µA, VBATT=3V) 4.0~15.0V 100µA typ. 30µA typ. 4.5mA typ. 1177AF : 3.275V±75mV 1177BF : 3.0V±70mV 1.75V±0.15V 5µA typ. 0.1µA max. 2.92V typ. Package SOP-8C (MM1177AF, MM1177BF) Applications 1. coin-shaped vanadium lithium batteries 2. Monitors and controls charging and discharging for and manganese dioxide batteries. Pin Assignment 1 2 8 7 6 5 3 4 5 1 2 3 4 6 7 SOP-8C 8 N.C GND NC OUT2 OUT1 BATT N.C VIN MITSUMI Charge and discharge control for coin-type lithium batteries and ...