CXLB73104锂电池充电功能的完整系统集成电路它能提供快速充电并最大化地延长电池寿命电池电压低于2.9V时决定是否需要预充电预充电电流可通过外部电阻在7.5mA到120mA的任意范围内设置 constant current constant voltage linear charger for single cell lithium-ion and Lithium Polymer

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                                          产品概述 返回TOP   zb7嘉泰姆

     CXLB73104 is a complete constant-current &constant voltage linear charger for single cell lithium-ion and Lithium-Polymer batteries.  Its SOT-23 package and low external component count make CXLB73104 ideally suited for portable applications.  Furthermore, the CXLB73104 is specifically designed to work within USB power specification.At the same time, CXLB73104 can also be used in the standalone lithium-ion and Lithium-polymer battery chargers. No external sense resistor is needed, and no blocking diode is required due to the internal MOSFET architecture.  Thermal feedback regulates the charge current to limit the die temperature during high power operation or high ambient temperature.  The charge voltage is fixed at 4.2V, and the charge current can be programmed externally with a single resistor.  The CXLB73104 automatically terminates the charge cycle when the charge current drops to 1/10th the programmed value after the final float voltage is reached.When the input supply (wall adapter or USB supply) is removed, the CXLB73104 automatically enters a low current stage, dropping the battery drain current to less than 2uA.  The CXLB73104 can be put into shutdown mode, reducing the supply current to 20uA. Other features include charge current monitor, undervoltage lockout, automatic recharge and a status pin to indicate charge termination and the presence of an input voltage. CXLB73104 is intentionally designed to have slightly negative Tempco. This provides extra protection to Lithium battery during charging. 

  CXLB73104是一款管理锂电池充电功能的完整系统集成电路</span>，</span>它能提供快速充电</span>，</span>并最大化地延长电池寿命</span>。</span>CXLB73104监测电池的情况</span>，</span>如果电池电压低于2.9V时</span>，</span>决定是否需要预充电。</span>预充电电流可通过外部电阻在</span>7.5mA到</span>120mA的任意范围内设置。</span>预充电状态会使电池保持良好状况</span>，</span>并延长电池寿命</span>。</span>一旦电池电压达2.9V，</span>CXLB73104将自动转换为恒流(CC)充电周期。</span>内部电流的设定为预充电时电流的</span>6倍以上</span>。</span>恒流循环功能将需要充电的时间降到最短</span>，</span>当电池接近完全饱和</span>，</span>大概在</span>4.15V左右，</span>CXLB73104将自动转换为恒压(CV)的充电周期</span>。</span>在恒压充电周期</span>，</span>充电电流将会减小使电池逐渐饱和而没有过饱和的危险</span>，</span>这是必要的</span>，</span>因为锂电池不能过饱和50mV，</span>否则就有爆炸的危险</span>。</span>CXLB73104确保锂电充满，</span>但不会进入过饱和状态</span>。</span>在充电完成后，</span>CXLB73104将进入关闭模式</span>，</span>降低内部耗电量到小于35uA。</span>这一特点使</span>CXLB73104能够应用到便携式设备的内部，并在设备不工作时几乎不消耗任何能量</span>。</span>zb7嘉泰姆

CXLB73104也提供了片内温度保护。</span>当温度达到预定的水平且电池面临过热危险</span>，</span>CXLB73104将减少充电电流使温度逐渐降低。</span>为电池充电提供适当的保护</span>。</span>zb7嘉泰姆

   产品特点 返回TOPzb7嘉泰姆

¾Programmable Charge Current Up to 800mA. zb7嘉泰姆

¾ No MOSFET, Sense Resistor or Blocking Diode Required. zb7嘉泰姆

¾ Constant-Current/Constant-Voltage Operation with Thermal Protection to Maximize Charge Rate without Risk of Overheating. zb7嘉泰姆

¾ Charges Single Cell Li-Ion Batteries Directly from USB Port. zb7嘉泰姆

¾ Preset 4.2V Charge Voltage with ±1% Accuracy.zb7嘉泰姆

¾ 20uA Supply Current in Shutdown. zb7嘉泰姆

¾ 2.9V Trickle Charge Threshold zb7嘉泰姆

¾ Soft-Start Limits Inrush Current. zb7嘉泰姆

¾ Available in 5-Lead SOT-23 and PSOP-8 (Exposed Pad) Packages. zb7嘉泰姆

¾ RoHS Compliant and 100% Lead (Pb)-Freezb7嘉泰姆

   应用范围 返回TOPzb7嘉泰姆

¾Cellular Telephones, PDA’s, MP3 Players. zb7嘉泰姆

¾ Charging Docks and Cradles zb7嘉泰姆

¾ Bluetooth Applicationszb7嘉泰姆

   技术规格书（产品PDF) 返回TOP zb7嘉泰姆

     需要详细的PDF规格书请扫一扫微信联系我们，还可以获得免费样品以及技术支持</span>！</span>
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