Eng 简体

nPM2100 电源管理IC

适配一次电池、搭载高效率升压稳压器与电量计的专用 PMIC

PM2100 是一款面向一次电池应用量身打造的电源管理芯片,满足不可充电电池供电产品的专属电源管控需求。器件可适配 AA/AAA/LRxx 型碱性电池(最多两节串联)、3 伏锂锰纽扣电池(CR2032 及同规格产品)、单节 / 双节氧化银与锌空纽扣电池,以及输入电压区间 0.7~3.4 伏范围内的各类一次电池

芯片内置高效率升压稳压器并自带直通自动模式,可充分耗尽电池电量直至放电终止电压;片载 LDO 能够拓展一路独立电压电源轨。

nPM2100 集成算法型电池电量计,配套完善的系统管理功能:硬件看门狗、硬件复位、启动故障恢复、断线唤醒、运输模式与休眠模式。

nPM2100 数据手册 [PDF | HTML]


电池管理

  • 支持电池品类 
    • AA/AAA/LRxx 碱性电池(最多两节串联)
    • 3V 锂锰纽扣电池(CR2032 等同类规格)
    • 单节 / 双节氧化银、锌空纽扣电池
    • 输入电压 0.7~3.4V 全品类一次电池
    • 电量计 
    • 剩余电量检测

电压稳压器

  • 升压稳压器 
    • 输出电流:150 毫安
    • 输出电压:1.8~3.3 伏 
      • 调压步长 50 毫伏
    • 可在大功率、低功耗、超低功耗模式自动切换,或切入直通模式
    • 静态电流:150 纳安
    • 转换效率:50 毫安负载最高 95%,10 微安负载可达 90.5%
  • LDO / 负载开关 
    • 输出电流:50 毫安
    • LDO 输出电压:0.8~3.0 伏
    • LDO 调压步长 50 毫伏

系统管理

  • 硬件复位
  • 看门狗定时器
  • 启动故障恢复
  • 运输模式:35 纳安
  • 休眠模式:175 纳安
  • 两路通用 GPIO
  • 兼容 I²C 协议的 TWI 双线接口

 

Key features
  • Supported batteries: alkaline AA/AAA/LRxx (1S and 2S), 3 V LiMnO₂ coin cells, and other primary batteries 

  • Fuel gauge 

  • Ultra-efficient boost regulator 

  • LDO / load switch 

  • Ship & hibernate mode 

  • Break-to-wake

  • Hard reset 

  • Watchdog timer 

  • Failed-boot recovery 

  • Two GPIOs 

  • TWI configuration interface 

Block diagram

nPM2100_Block_Diagram.png

Battery fuel gauge for IoT devices

Accurate fuel gauging is essential for any battery‑powered device, giving users clear and reliable insight into how much energy is left and helping avoid unexpected shutdowns.

Nordic’s fuel gauging provides accurate state of charge information for all supported battery types. Battery state of health is also supported for rechargeable batteries - tracking actual capacity and aging over time to understand how the battery performs throughout its lifetime. This deeper insight helps devices stay reliable for longer and makes rechargeable battery replacement more predictable.

By combining high accuracy with ultra‑low power operation - including zero power consumption in sleep - and low system cost, the Nordic algorithm-based fuel gauge solution delivers accurate battery information without extra components, licensing fees, or impact on battery life.

The Fuel Gauge page brings together all documentation, development resources, support & training related to fuel gauging and battery health.

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