The LTC1731 is a complete constant-current/constant-voltage linear charger controller for single cell lithium-ion batteries. Nickel-cadmium (NiCd) and nickel-metal-hydride (NiMH) batteries can also be charged with constant current using external termination. The external sense resistor sets the charge current with 5% accuracy. An internal resistor divider and precision reference set the final float potential with ±1% accuracy. The output float voltage is set internally to 4.1V (LTC1731-4.1) or 4.2V (LTC1731-4.2). When the input supply is removed,the LTC1731 automatically enters a low current sleep mode, dropping the battery drain current to typically 7µA. An internal comparator detects the end-of-charge (C/10) condition while a programmable timer, using an external capacitor, sets the total charge time. Fully discharged cells are automatically trickle charged at 10% of the programmed current until cell voltage exceeds 2.457V. The LTC1731 is available in the 8-pin MSOP and SO packages. Float Voltage LTC1731-4.1 4.1V LTC1731-4.2 4.2V LTC1731-8.2 8.2V LTC1731-8.4 8.4V Applications * Cellular Phones * Handheld Computers * Charging Docks and Cradles * Programmable Current Source * Complete Linear Charger Controller for 1-Cell Li-Ion Batteries * 1% Voltage Accuracy * Programmable Charge Current * C/10 Charge Current Detection Output * Programmable Charge Termination Timer https://elecena.pl/product/14875172/single-cell-lithium-ion-linear-battery-charger-controllers 2018-05-22 https://elecena.pl/product/14875172/single-cell-lithium-ion-linear-battery-charger-controllers 2025-01-22