Battery charger interface circuitBattery charger interface⎫ Battery charger interface 1 Schematic 1 Synoptic 2 Precharge (Over discharged battery) 3 Full charge 4 Hardware and software protections 5 Over voltage 5 Short-circuited battery 5 Watchdog 5Schematic [pic]Q902 : Charge PMOS switchR907, R908, R909, R911 : current limitation resistors during Precharge(~330 Ohms)RR901 : current sense resistor (0,2 Ohms)R905 : pull-up for ICTL (1 Mohms because the output current on ICTL is verylow)Q903, D902, R910 : overvoltage protectionC903 : output filtering capacitorC902, R906 : RC filter for the command of the gate of Q902 (…)Synoptic[pic]Precharge (Over discharged battery)When the battery voltage is low < 3,2 V, the c……
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