Microsource semiconductor

LP4080 is an ultra-low power linear charger suitable for TWS headphone applications. It includes a linear charger for CHGb charging status indication in charging headphones, as well as an ENb input to disable the charger when needed. The constant charging current (CC) of the charger can be programmed through the ISET pin through an external resistor. The charger has an ideal diode mode. Two logical signals are provided to work together with Bluetooth SoC. Every time the earphones are placed in the charging case, a reset signal is output to the SoC. Every time the earphones leave the charging case, PWRON will output a pulse signal to turn on the earphone SoC. The GPO pin is a multifunctional output pin designed for the system. All these signals can also be controlled through single line communication. The entire device is packaged in a small 2mm x 2mm lead DFN packaging.