Ultra-high Efficiency Linear Charger for TWS Earphones
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LP4080H
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概述
The LP4080H is an ultra-low power linear charger targeting at TWS earphone applications. It contains a linear charger to charge the Li-ion battery in the earphone with a CHGb charging status indication and an ENb input to disable the charger when needed. The constant charge current (CC) of the charger is programmable via the ISET pin by an external resistor. The charger has an ideal-diode mode for high efficiency and low heat operation. Two logic signals are offered to work with the Bluetooth SoC. The RESET outputs a reset signal to the SoC every time the earphone is placed into the charging case. The PWRON outputs a pulse signal to turn on the earphone SoC every time the earphone leaves the charging case. The GPO pin is a multifunctional output pin for system design. All these signals can also be controlled via a one-wire communication.The whole system is in a small 8-pin 2x2 DFN package.
Ultra-high Efficiency Linear Charger for TWS Earphones
封装
DFN-8(2*2)
特征
特征
◆ Input over-voltage protected up to 8-V ◆ 0.6-µA standby current from the battery ◆ Programmable charge current up to 300mA ◆ Ideal diode mode for high efficiency and low heat ◆ 7.5-mA fixed trickle charge ◆ 9-mA fixed termination current ◆ Programmable 4.0-V/4.2-V/4.35-V/4.4-V constant voltage options ◆ Automatic battery recharge control ◆ CHGb output for charging status indication ◆ ENb control to disable the charger ◆ RESET signal to prevent the bluetooth system on chip (SoC) firmware failure ◆ PWRON signal to automatically power on the earphone SoC once leaving the charging case ◆ Private one-wire bus to send instructions from the charging case to the linear charger for control ◆ Programmable general purpose output signal ◆ I2C interface with interrupt indication ◆ 4-uA ultra-low quiescent current ◆ 2mm X 2mm DFN-8 package ◆ RoHS Compliant and 100% Lead (Pb) free
