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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 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

关键参数

开发工具

• MAX1879EVKIT

技术资料

• Design Case Study: Designing a Power Supply for a Portable, Wireless Contact Manager
• Single-Cell Li+ Cradle Charger With A Linear AC Adapter

质量和环境数据

• MAX1879.pdf

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

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