onsemi / Fairchild FAN5400鋰離子電池開關充電器

Fairchild Semiconductor FAN5400系列USB相容鋰離子電池開關充電器解決了便攜式設備中鋰離子電池的快速充電時間需求,並且克服了與線性充電器相關的散熱問題。Fairchild FAN5400系列是今日電子(EPC)舉辦的年度的獲獎者。Fairchild FAB540x電池開關充電器的充電參數和操作模式可透過I²C接口(可在3.4Mbps下運行)進行編程。1.25A的最大充電電流可確保快速充電時間,高充電電壓精度(25°C下為±0.5%)允許更大的電池「限值」,從而實現更長的電池壽命。除標準散熱和短路保護外,FAN5400系列還可承受高達20V DC輸入,以防止USB端口出現未調節的過電壓情況。這些設備可透過USB端口或5V AC/DC適配器提供高效充電,並且在充電過程中保持冷卻。這些鋰離子電池開關充電器是為單節電池和並聯鋰離子電池充電的理想解決方案,勝過傳統的線性充電器,同時可提供便攜式USB On-The-Go (USB-OTG)功能。

特點

  • Fully integrated, high-efficiency charger for single-cell Li-Ion and Li-Polymer battery packs
  • Faster charging than linear
  • Charge voltage accuracy
    • 0.5% at 25°C
    • 1% from 0 to 125°C
  • ±5% input current regulation accuracy
  • ±5% charge current regulation accuracy
  • 20V absolute maximum input voltage
  • 6V maximum input operating voltage
  • 1.25A maximum charge rate
  • Programmable through high-speed I2C interface (3.4Mb/s) with Fast Mode Plus compatibility
  • 3MHz synchronous Buck PWM controller with wide duty cycle range
  • Small footprint 1µH external inductor
  • Safety timer with reset control
  • 1.8V regulated output from VBUS for auxiliary circuits
  • 5V, 300mA Boost Mode for USB OTG for 2.5 to 4.5V battery input

應用

  • Cell phones
  • Smartphones
  • PDAs
  • Tablets
  • Portable media players
  • Gaming devices
  • Digital cameras

影片

發佈日期: 2011-09-19 | 更新日期: 2022-07-14