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1.产品概述       2.产品特点     w8r嘉泰姆

3.应用范围       4.技术规格书下载（PDF文档）w8r嘉泰姆

5.产品封装       6.电路原理图  w8r嘉泰姆

7.相关产品w8r嘉泰姆

   产品概述 返回TOPw8r嘉泰姆

CXLB7391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。CXLB7391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，CXLB7391自动进入休眠模式以减少电池端的供电电流。CXLB7391提供SOP-8与TDFN-10封装。w8r嘉泰姆

The CXLB7391 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 CXLB7391 provides a small, simple and efficient solution to fast charge one (4.2V) or two (8.4V) cell lithium-ion batteries. The CXLB7391 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 CXLB7391 automatically re-starts the charge if the battery voltage falls below an internal threshold, 4.05V per cell. The ECXLB7391also automatically enters sleep mode when DC supplies are removed. The ECXLB7391is available in the 8-lead SOP and 10-lead TDFN packages.   w8r嘉泰姆

产品特点 返回TOPw8r嘉泰姆

   • 宽输入电压范围：w8r嘉泰姆

4.8V to 20V–4.2 Versionw8r嘉泰姆

8.9V to 20V–8.4 Versionw8r嘉泰姆

8.9V to 20V–8.4A Versionw8r嘉泰姆

• 固定500kHz开关频率w8r嘉泰姆

• 充电电流终止指示输出w8r嘉泰姆

• 七小时的安全充电止计时w8r嘉泰姆

• ±1%恒压充电精度w8r嘉泰姆

• ±10%恒流充电精度w8r嘉泰姆

• 低于10uA的电池反相供电电流w8r嘉泰姆

• 电池低电压涓流充电w8r嘉泰姆

• 自动电池重置充电w8r嘉泰姆

• 低功耗休眠模式w8r嘉泰姆

• 电池温度检测w8r嘉泰姆

• 提供SOP-8与TDFN-10封装w8r嘉泰姆

• 符合RoHS规范及Pb-Freew8r嘉泰姆

Wide Input Supply Voltage Range: w8r嘉泰姆

4.8V to 20V – 4.2 Version w8r嘉泰姆

8.9V to 20V – 8.4 Version w8r嘉泰姆

8.9V to 20V – 8.4A Version
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500kHz Switching Frequencyw8r嘉泰姆

 
End-of-Charge Current Detection Outputw8r嘉泰姆

 
7 Hour Charge Termination Timerw8r嘉泰姆

 
±1% Charge Voltage Accuracyw8r嘉泰姆

 
±10% Charge Current Accuracyw8r嘉泰姆

 
Low 10μA Reverse Battery Drain Currentw8r嘉泰姆

 
Automatic Battery Rechargew8r嘉泰姆

 
Automatic Trickle Charging of Low Voltage Batteriesw8r嘉泰姆

 
Automatic Sleep Mode for Low Power Consumptionw8r嘉泰姆

 
Battery Temperature Sensingw8r嘉泰姆

 
Stable with Ceramic Output Capacitorw8r嘉泰姆

 
8-Lead SOP and 10-Lead TDFN Packagesw8r嘉泰姆

 
RoHS Compliant and 100% Lead (Pb)-Freew8r嘉泰姆

   应用范围 返回TOPw8r嘉泰姆

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   技术规格书（产品PDF) 返回TOP w8r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！w8r嘉泰姆

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电路原理图 返回TOPw8r嘉泰姆

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◀ Previous: 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

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Next▶: The CXLB7399 is a complete constant-current/constant voltage linear charger for cell lithium-ion batteries. Its package and low external component count make the CXLB7399 ideally suited