LTC4071 parallel lithium-ion/lithium-polymer battery charger system with low battery disconnection function
peculiarity
- 在一颗 IC 中提供充电器和电池组保护功能
- 低工作电流 (550nA)
- 接近零电流 (
- 可通过引脚选择的低电池电量断接电平：2.7V 或 3.2V
- 在整个温度范围内实现 1% 浮置电压准确度
- 50mA 最大内部并联电流
- 可通过引脚选择的浮置电压选项：4.0V、4.1V、4.2V
- 用于提供锂离子 / 锂聚合物电池保护的超低功率脉动 NTC 浮置电压查验
- 适合于断续、连续和非常低功率充电电源
- 高电池电量状态输出
- 耐热性能增强型、扁平 (高度仅 0.75mm) 8 引脚 (2mm x 3mm) DFN 封装和 MSOP 封装
description
The LTC®4071 enables simple charging of lithium-ion/lithium-polymer batteries from very low-current, intermittent, or continuously charging supplies. The device has a low-battery lockout disconnect capability that is close to zero current, preventing deep discharge and potentially irreparable damage to even very low-capacity batteries. Operating currents of 550nA to 50mA enable charging from previously unusable power sources. With its low operating current, LTC4071 is well suited for charging low-capacity lithium-ion or thin-film batteries in energy harvesting applications. LTC4071's unique architecture results in an extremely simple battery charger solution; Only one external resistor is required.
LTC4071 provides a pin-selectable float voltage with an accuracy of ±1%. By automatically reducing the battery float voltage when the NTC thermistor temperature is above 40°C, the device's integrated battery thermal checker extends battery life and improves reliability. In addition, the LTC4071 offers two pin-selectable low battery disconnect levels and a high battery state output.
The device is available in two thermally enhanced packages, a compact and low profile (only 0.75mm height) 8-pin (2mm x 3mm) DFN package, and an 8-pin MSOP package.
apply
- 低容量锂离子 / 锂聚合物电池备份
- 薄膜电池
- 能量提取 / 收集
- 具备份的太阳能电源系统
- 存储器备份
- 嵌入式汽车系统