LPS微源半导体LP7811内置开关充电PMIC芯片

一、描述

The LP7811 is an advanced TWS charging case management IC targeting to improve the total battery run time of the TWS earphones. The IC features a switching charger protects up to 30V input voltage and digitally programmable up to 1.7-A charge current via an I2C bus. The smart discharge voltage management feature tries to maximize the battery run time with ultra-low dropout charging scheme. The VOL and the VOR outputs track the battery voltages of the earphones when operating together with the companion linear charger (LP408X) 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 IC supports two independent bidirectional communication bus to the left and right earphone. An I2C bus is offered for programmability and flexibility of the device. The quiescent current is 5-uA in standby mode. The whole system is in a small 24-pin 4x4 QFN package.

二、特点

? Case Charging Management
 - Support 4.1V to 6.0 V input voltage with 30V absolute maximum input voltage rating
 - Programmable fast charge current up to 1.7A with up to 95% efficiency and 5% accuracy
 - Programmable floating voltage with 0.5% accuracy
 - Automatic recharge function
 - Programmable trickle charge current
 - Programmable termination current
? Smart Earphone Charging Management
 - Independent earphone insert detection and charging path
 - Smart earphone ultra-low dropout charging to maximize battery run time
 - Programmable earphone fast charge current up to 300mA each channel
 - Programmable End of Charge (EEOC) current
 - Bi-directional communication to earphones
? Programmable Always-on Linear Regulator
? Temperature Management
 - JEITA standard NTC management during charging and discharging
 - Charging current thermal foldback
 - Thermal shutdown protection
? I2C interface with interrupt indication
? 5-uA ultra-low quiescent current
? 4mm X 4mm QFN-24 package
? RoHS Compliant and 100% Lead (Pb) free

三、应用
? TWS charging case
? Wireless microphone
? Smart Glasses

四、订购信息

五、典型应用电路

开关充电PMIC芯片方案应用资料及参考手册请咨询微源代理商东莞市中铭电子，专业的FAE提供技术支持服务