Battery charger interface Battery 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 5 Schematic [pic] Q902 : Charge PMOS switch R907, 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 very low) Q903, D902, R910 : overvoltage protection C903 : output filtering capacitor C902, R906 : RC filter for the command of the gate of Q902 (…) Synoptic [pic] Precharge (Over discharged battery) When the battery volta……