MAX1879:简单、高效率、1节Li+电池脉冲充电器

The MAX1879 single-cell lithium-ion (Li+) battery charger utilizes an efficient pulse-charging architecture to minimize power dissipation in portable devices. This architecture combines the efficiency of switch-mode chargers with the simplicity and low cost of linear chargers. This simple device, in conjunction with a current-limited wall cube and a PMOS transistor, allows safe and fast charging of a single Li+ cell. The MAX1879 initiates charging in one of three ways: battery insertion, charger power-up, or toggling the THERM pin. Key safety features include continuous voltage and temperature monitoring, a preset charger time-out, and an 8mA precharge current mode to charge near-dead cells. Automatic detection of input power removal shuts down the device, minimizing current drain from the battery. An overall system accuracy of 0.75% ensures that the cell capacity is fully utilized without cycle life degradation. The MAX1879 is offered in a space-saving 8-pin µMAX® package. An evaluation kit (MAX1879EVKIT) is available to help reduce design time.

关键特性
  • Simple Design Minimizes Heat
  • Low Component Count, No Inductor
  • Battery-Full Indicator
  • 0.75% Accurate Battery Regulation
  • 1.5µA (max) Battery Current Drain with Wall Cube Removed
  • Restart Charging at 4.0V
  • Continuous Overvoltage and Overtemperature Protection
  • Safely Precharges Near-Dead Cells
  • Automatic Power-Down when Power Source is Removed
  • Charges 1 Cell from as Low as 4.5V
  • Pin-Compatible Upgrade to MAX1679
MAX1879:典型工作电路
MAX1879:典型工作电路
应用
  • 蜂窝电话
  • 消费类音频
  • 无绳电话
  • 数码相机
  • 全球定位系统(GPS)
  • 寻呼机
  • 掌上电脑、手持终端
  • 笔输入掌上电脑、PDA和数字助理
  • 智能电池组/充电器
数据手册DataSheet
语言下载文件备注
英文MAX1879.pdfRev 0; 05/2001
关键参数
Part NumberProtected VIN
(V)
Charging VIN
(V)
Charge Rate Set byMax. ICHG
(A)
Charge TerminationCharge RegulationOper. Temp.
(°C)
Package/PinsBudgetary
Price
maxSee Notes
MAX18792222External Source2External ControlPulse-40 to +85µMAX/8$1.49 @1k
开发工具
技术资料
质量和环境数据
相关产品
  • MAX1736:SOT23封装、单节Li+电池充电器,配合限流型电源使用
订购型号
型号状况推荐替代产品封装温度RoHS/无铅
MAX1879EUA停止供货MAX1879EUA+µMAX,;8引脚;15.6mm²-40°C至+85°CRoHS/无铅:否
MAX1879EUA+生产中µMAX,;8引脚;15.6mm²-40°C至+85°CRoHS/无铅:无铅
MAX1879EUA+T生产中µMAX,;8引脚;15.6mm²-40°C至+85°CRoHS/无铅:无铅
MAX1879EUA-T停止供货MAX1879EUA+TµMAX,;8引脚;15.6mm²-40°C至+85°CRoHS/无铅:否
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MAX1879.pdf MAX1879
MAX1879.pdf MAX1879
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