产品概述 返回TOPcmG嘉泰姆
CXLB7391是一款使用电流模式</span>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</span>(8.4AV)锂离子电池充电。</span>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</span>4.2V±1%精度的充电终止电压控制。</span> 内部比较电路进行充电终止条件检测，当充电电流小于</span>EOC(end-of-charge)或者内部定时器计时终止都将停止充电循环。</span>CXLB7391将检测单节电池电压是否小于</span>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。</span>CXLB7391提供SOP-8与</span>TDFN-10封装。</span>cmG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. cmG嘉泰姆
产品特点 返回TOPcmG嘉泰姆
• 宽输入电压范围：cmG嘉泰姆
4.8V to 20V–4.2 VersioncmG嘉泰姆
8.9V to 20V–8.4 VersioncmG嘉泰姆
8.9V to 20V–8.4A VersioncmG嘉泰姆
• 固定500kHz开关频率</p>
• 充电电流终止指示输出cmG嘉泰姆
• 七小时的安全充电止计时</p>
• ±1%恒压充电精度cmG嘉泰姆
• ±10%恒流充电精度cmG嘉泰姆
• 低于10uA的电池反相供电电流</p>
• 电池低电压涓流充电</p>
• 自动电池重置充电cmG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cmG嘉泰姆
• 符合RoHS规范及Pb-FreecmG嘉泰姆
Wide Input Supply Voltage Range: cmG嘉泰姆
4.8V to 20V – 4.2 Version cmG嘉泰姆
8.9V to 20V – 8.4 Version cmG嘉泰姆
8.9V to 20V – 8.4A Version
cmG嘉泰姆
500kHz Switching FrequencycmG嘉泰姆
End-of-Charge Current Detection OutputcmG嘉泰姆
7 Hour Charge Termination TimercmG嘉泰姆
±1% Charge Voltage AccuracycmG嘉泰姆
±10% Charge Current AccuracycmG嘉泰姆
Low 10μA Reverse Battery Drain CurrentcmG嘉泰姆
Automatic Battery RechargecmG嘉泰姆
Automatic Trickle Charging of Low Voltage
BatteriescmG嘉泰姆
Automatic Sleep Mode for Low Power
ConsumptioncmG嘉泰姆
Battery Temperature SensingcmG嘉泰姆
Stable with Ceramic Output CapacitorcmG嘉泰姆
8-Lead SOP and 10-Lead TDFN PackagescmG嘉泰姆
RoHS Compliant and 100% Lead (Pb)-FreecmG嘉泰姆
应用范围 返回TOPcmG嘉泰姆
cmG嘉泰姆
• 小型笔记型计算机cmG嘉泰姆
• 可携式DVD播放器</p>
• 掌上型设备</p>
技术规格书（产品PDF) 返回TOP
cmG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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