We have a Problem with our PCB BQ25890. Charging 1cell (3200mAh) with cell voltage above 3.5V is no problem (chraging with apple supply 12W / d+ and d- detection is used). Charger works with 1,8A Charge current. When the cell voltage is under 3.5V no charging is possible. Our stat led flashes for a micro sec. and the bq doesn´t work. Only when d+ and d- are open the charger charges with 500mA also und 3.5V
What can ist be?
Thanks in advance for the hints.
