The LP7810 is an advanced TWS charging case management IC targeting to improve the total battery run time of the TWS earphones. The IC features a linear charger protects up to 30V input voltage and digitally programmable up to 930mA charge current via an I2C bus.
The smart discharge voltage management feature tries to maximize the battery run time. The VOL and the VOR outputs track the battery voltages of the earphones when operating together with the companion linear charger (LP4080) in the earphone, minimizing the power loss. An NTC interface is offered to manage the charge and discharge operation based on the battery temperature sensed by the NTC resistor. Additional silicon temperature management ensure the safe operation. Earphone insertion and removal detections simplify the design of the earphone detection. The LP7810 supports an independent bidirectional communication bus to the earphones. An I2C bus is offered for programmability and flexibility of the device. The typical quiescent current is 4-uA. The whole system is in a small 16-pin 3x3 QFN package.
