ETA9085

ETA9085 is an all-in-one solution for TWS charge cradle. It includes a 20V single cell Li+ battery linear charger, a 5V Boost synchronous converter with true-shutoff function and a Fuel Gauge with LED indication. The linear charger is fully integrated with constant current (CC) / constant voltage (CV) control module and a charge FET. It has a pre-charge function for trickle charging a deeply discharged battery and its fast charge current can be programmed by an external resistor. In CV charge stage, charging will be terminated when the charge current drops to 1/10 of the programmed value. The integrated low power 5V Boost converter is capable of delivering 0.5A current at 5V output. It can be shut down by pulling the ENBST pin low. The true shut down feature disconnect output from the BAT thereby further decreasing the system standby power. Its 1.0MHz switching frequency allows a very small external inductor with inductance as low as 2.2uH. A fuel gauge also drives 4 LEDs for battery level indication. ETA9085 is ideal for applications such as a TWS charging cradle that requires low standby power and small PCB space.