概述
The LP7810A 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 LP7810A 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.
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 LP7810A 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.
应用
◆ TWS charging case
◆ Wireless microphone
◆ Smart Glasses
◆ Wireless microphone
◆ Smart Glasses
数据参数
数据参数
最大充电电流(mA)
930
充电电流可编辑
Y
充电工作电压（V）
4~30
过压保护（V）
Y
静态电流(uA)
4
充电工作模式
linear
电池电压（V）
4.1~4.4
输出电压（V）
4.3~5.05
输出电流（mA）
250*2
电池过放电压（V）
2.8~3.5
NTC检测
Y
产品特征/功能
HERO Charge,I2C控制,支持MCU双向通讯,耳机电压跟随充电提升耳机仓续航时间
封装
QFN-16（3*3)
特征
特征
◆ Case Charging Management
- Support 4.1V to 6.2V input voltage with 30V absolute maximum input voltage rating
- Programmable fast charge current up to 930mA
- Programmable floating voltage with 0.5% accuracy
- Automatic recharge function
- 7.5% trickle charge current
- 7.5% 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 250mA each channel
- Programmable End of Charge (EEOC) current
- Bi-directional communication to earphones
◆ 1-channel always-on Linear Regulator
◆ Temperature Management
- JIETA standard NTC management during charging and discharging
- Charging current thermal foldback
- Thermal shutdown protection
◆ I2C interface with interrupt indication
◆ 4-uA ultra-low quiescent current
◆ 3mm X 3mm QFN-16 package
◆ RoHS Compliant and 100% Lead (Pb) free
- Support 4.1V to 6.2V input voltage with 30V absolute maximum input voltage rating
- Programmable fast charge current up to 930mA
- Programmable floating voltage with 0.5% accuracy
- Automatic recharge function
- 7.5% trickle charge current
- 7.5% 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 250mA each channel
- Programmable End of Charge (EEOC) current
- Bi-directional communication to earphones
◆ 1-channel always-on Linear Regulator
◆ Temperature Management
- JIETA standard NTC management during charging and discharging
- Charging current thermal foldback
- Thermal shutdown protection
◆ I2C interface with interrupt indication
◆ 4-uA ultra-low quiescent current
◆ 3mm X 3mm QFN-16 package
◆ RoHS Compliant and 100% Lead (Pb) free
