概述
The LP7800S is an advanced TWS charging case management IC targeting to improve the total battery run time of the TWS earphones. The IC integrates a linear charger which contains completely charge modes with up to 350-mA charge current, and a smart discharge management module to protect the battery from over-discharged to maximize the battery run time. The IC features a high efficiency synchronous boost module,automatic load detection and Key control discharge, automatic shut-down while the discharge current is lower than the cut-off current threshold. The IC includes charging and discharging status indication through two LEDs controller. The quiescent current is less than 20-µA in standby mode. The device provides various safety features for battery charging and discharging, including device junction temperature-limit protection for charging by limiting the charge current, which is implemented by an internal thermal foldback regulation loop, battery discharge inductor current-limit protection, VOUT short protectionand thermal shutdown.The LP7800S is available in a small 8-pin ESOPpackage.
应用
◆ TWS charging case
数据参数
数据参数
最大充电电流(mA)
350
充电电流可编辑
-
充电工作电压（V）
4.5~30
过压保护（V）
Y
静态电流(uA)
20
充电工作模式
linear
电池电压（V）
4.2
输出电压（V）
5.1
输出电流（mA）
500
电池过放电压（V）
2.8
NTC检测
-
产品特征/功能
五合一耳机充电仓芯片,关断型,2LED状态指示
封装
ESOP8
特征
特征
◆ Maximum input voltage up to 30-V with 15-V input-over-voltage protection
◆ Charge management
- Maximum charge current up to 350-mA
- Default 4.2-V floating voltage with 1% accuracy
- Trickle current/constant current/constant voltage mode supported
- Charge termination and automatic re-charge
- Dynamic power management for different input source capacity application
◆ Discharge management
- Smart discharge voltage management to maximize the battery life
- 96% peak boost efficiency
- Automatic load detection
- Key control
- Low cut-off discharge current
- Inductor current-limit protection
- Short circuit protection
◆ Temperature Management
- Thermal foldback at 125℃ junction temperature
- Thermal shutdown at 150℃ junction temperature
◆ Built-in charging and discharging indication
◆ 20-µA low quiescent current in standby mode
◆ Charge management
- Maximum charge current up to 350-mA
- Default 4.2-V floating voltage with 1% accuracy
- Trickle current/constant current/constant voltage mode supported
- Charge termination and automatic re-charge
- Dynamic power management for different input source capacity application
◆ Discharge management
- Smart discharge voltage management to maximize the battery life
- 96% peak boost efficiency
- Automatic load detection
- Key control
- Low cut-off discharge current
- Inductor current-limit protection
- Short circuit protection
◆ Temperature Management
- Thermal foldback at 125℃ junction temperature
- Thermal shutdown at 150℃ junction temperature
◆ Built-in charging and discharging indication
◆ 20-µA low quiescent current in standby mode
