ADP2291RM-EVALZ:  Compact, 1.5 A Linear Charger for Single-Cell Li+ Battery

The ADP2291 is a constant-current/constant-voltage linear charger for a single cell lithium ion battery, requiring just a few components to provide a simple and safe charging system that operates from a wide 4.5 V to 12 V input voltage range. It features an internally controlled, multistep charging cycle that improves battery life.

An external, low cost, PNP provides the charging current to the battery and an external resistor sets the maximum charge current. A small external capacitor programs the maximum charge time. The controller includes an LED driver to indicate the battery charging status.

Safety features include charging stop mode for battery faults, output overshoot protection, and thermal shutdown. The ADP2291 also features automatic reverse isolation, which does not require an additional blocking diode.

The multistep charge cycle optimizes the battery charging time in a safe manner. It features a trickle charge mode for a deeply discharged cell and a fast charging mode with a maximum current of 1.5 A. The ADP2291 controls the end of charge with a 4.2 V output voltage that is 1% accurate over line and temp-erature. It automatically recharges the battery if the cell voltage drops. When the input supply is removed, the part enters a low current state and reduces the current drawn from the battery to below 1 µA.

The ADP2291 is available in both a small, 8-pin MSOP package and a 3 × 3 mm LFCSP package that is ideally suited for small, portable applications.

ADP2291RM-EVALZ 特点
ADP2291RM-EVALZ 功能框图

ADP2291 芯片订购指南
产品型号 产品状态 封装 引脚 温度范围
ADP2291ACPZ-R7 量产 8 ld LFCSP (3x3mm) 8 工业
ADP2291ARMZ-R7 量产 8 ld MSOP 8 工业
ADP2291RM-EVALZ 量产 评估板 - 工业
ADP2291RM-EVALZ 应用技术支持与电子电路设计开发资源下载
  1. ADP2291 数据手册DataSheet 下载 . pdf
  2. ADI 模拟器件公司比较器产品选型指南 . pdf
  3. Analog Devices, Inc. 美国模拟器件公司产品订购手册 .pdf