CXLB7390电流模式PWM操作降压交换式架构的恒定电流，恒定电压的锂离子电池充电器，其工作频率为恒定的500kHz。可提供单节(4.2V)或双节(8.4AV)锂离子电池充电

CXLB7390是一款使用电流模式PWM操作降压交换式架构的恒定电流，恒定电压的锂离子电池充电器，其工作频率为恒定的500kHz。可提供单节(4.2V)或双节(8.4AV)锂离子电池充电。它设定包含涓流，恒流与恒压三个阶段充电，使用外部侦测电阻进行±10%精度的充电电流调节，其内部使用分压电路与精准的参考电压进行每节电池4.2V±1%精度的充电终止电压控制。内部比较电路进行充电终止条件检测，当充电电流小于EOC(end-of-charge)或者内部定时器计时终止都将停止充电循环。CXLB7390将检测单节电池电压是否小于4.05V来判断是否自动重置充电循环。当直流输入电源移除时，CXLB7390自动进入休眠模式以减少电池端的供电电流。CXLB7390提供SOP-8与TDFN-10封装
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The CXLB7390 is a constant current, constant voltage Li-Ion battery charger controller that uses a current mode PWM step-down (buck) switching architecture. With a 500kHz switching frequency, the CXLB7390 provides a small, simple and efficient solution to fast charge one (4.2V) or two (8.4V) cell lithium-ion batteries. The CXLB7390 charges the battery in three phases: conditioning, constant current, and constant voltage. An external sense resistor sets the charge current with ±10% accuracy. An internal resistor divider and precision reference set the final float voltage to 4.2V per cell with ± 1% accuracy. An internal comparator detects the near end-of-charge condition while an internal timer sets the total charge time and terminates the charge cycle. The CXLB7390 automatically re-starts the charge if the battery voltage falls below an internal threshold, 4.05V per cell. The CXLB7390also automatically enters sleep mode when DC supplies are removed. The CXLB7390is available in the 8-lead SOP and 10-lead TDFN packages.

   产品特点 返回TOPxuB嘉泰姆

z Wide Input Supply Voltage Range: xuB嘉泰姆

    4.7V to 20V – 4.2 Version xuB嘉泰姆

    8.9V to 20V – 8.4 Version xuB嘉泰姆

z 500kHz Switching Frequency xuB嘉泰姆

z End-of-Charge Current Detection Output xuB嘉泰姆

z 3 Hour Charge Termination Timer xuB嘉泰姆

z ±1% Charge Voltage Accuracy xuB嘉泰姆

z ±10% Charge Current Accuracy xuB嘉泰姆

z Low 10μA Reverse Battery Drain Current xuB嘉泰姆

z Automatic Battery Recharge xuB嘉泰姆

z Automatic Trickle Charging of Low Voltage Batteries xuB嘉泰姆

z Automatic Sleep Mode for Low Power Consumption xuB嘉泰姆

z Battery Temperature Sensing xuB嘉泰姆

z Stable with Ceramic Output Capacitor xuB嘉泰姆

z 8-Lead SOP and 10-Lead TDFN Packages xuB嘉泰姆

z RoHS Compliant and 100% Lead (Pb)-FreexuB嘉泰姆

• 宽输入电压范围:xuB嘉泰姆

4.7V to 20V – 4.2 VersionxuB嘉泰姆

8.9V to 20V – 8.4AVersionxuB嘉泰姆

• 固定500kHz开关频率</p>

• 充电电流终止指示输出xuB嘉泰姆

• 三小时的安全充电止计时</p>

• ±1%恒压充电精度xuB嘉泰姆

• ±10%恒流充电精度xuB嘉泰姆

• 低于10uA的电池反相供电电流</p>

• 自动电池重置充电xuB嘉泰姆

• 低功耗休眠模式</p>

• 电池温度检测</p>

• 提供SOP-8与TDFN-10封装xuB嘉泰姆

• 符合RoHS规范及Pb-FreexuB嘉泰姆

   应用范围 返回TOPxuB嘉泰姆

z Small Notebook Computer xuB嘉泰姆

z Portable DVD xuB嘉泰姆

z Handheld InstrumentsxuB嘉泰姆

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