Cxlb7359 is a PWM step-down mode single lithium iron phosphate battery charging management integrated circuit that can be powered by solar panel. It can independently manage the charging of single lithium iron phosphate battery. It has the advantages of small package, less peripheral components and simple use. Cxlb7359 has trickle, constant current and constant voltage charging mode, which is very suitable for lithium iron phosphate battery charging management. In constant voltage charging mode, cxlb7359 modulates the battery voltage to 3.625v; in constant current charging mode, the charging current is set through an external resistance. When the current output capacity of the input power is reduced, the internal circuit can automatically track the maximum power point of the solar panel. The user does not need to consider the worst case, and can maximize the output power of the solar panel, which is very suitable for the application of solar panel power supply. For deeply discharged batteries, when the battery voltage is lower than 66.5% of the constant voltage charging voltage (typical value), cxlb7359 uses 17.5% of the constant current charging current set to trickle charge the battery. In the constant voltage charging stage, the charging current decreases gradually. When the charging current decreases to 16% of the constant current charging current, the charging ends. At the end of charging state, if the battery voltage drops to 91.66% of the constant voltage charging voltage, a new charging cycle will start automatically. Cxlb7359 automatically enters sleep mode when the input power supply is powered down or the input voltage is lower than the battery voltage
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CXLB7359 |
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具有太阳能电池最大功率点跟踪功能的4A 单节磷酸铁锂电池充电管理集成电路 |
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产品简介 规格书下载 免费样品申请 |
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概述： |
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CXLB7359 是一款可使用太阳能板供电的PWM 降压模式单节磷酸铁锂电池充电管理集成电路，独立对单节磷酸铁锂电池充电进行管理，具有封装外形小，外围元器件少和使用简单等优点。CXLB7359 具有涓流，恒流和恒压充电模式，非常适合磷酸铁锂电池充电管理。在恒压充电模式，CXLB7359 将电池电压调制在3.625V；在恒流充电模式，充电电流通过一个外部电阻设置。当输入电源的电流输出能力降低时，内部电路能够自动跟踪太阳能板的最大功率点，用户不需要考虑最坏情况，可最大限度地利用太阳能板的输出功率，非常适合利用太阳能板供电的应用。对于深度放电的电池，当电池电压低于恒压充电电压的66.5%(典型值)时，CXLB7359用所设置的恒流充电电流的17.5%对电池进行涓流充电。在恒压充电阶段，充电电流逐渐减小，当充电电流降低到恒流充电电流的16%时，充电结束。在充电结束状态，如果 |
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应用： |
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手持设备 |
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便携式工业和医疗仪器 |
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应急灯具 |
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电动工具 |
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备用电池应用 |
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独立电池充电器 |
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特点： |
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太阳能板最大功率点跟踪功能 |
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宽输入电压范围：4.5V 到28V |
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对单节磷酸铁锂电池完整的充电管理 |
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充电电流可达 4A |
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PWM 开关频率：300KHz |
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恒压充电电压： 3.625V±40mV |
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恒流充电电流由外部电阻设置 |
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对深度放电的电池进行涓流充电 |
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自动再充电功能 |
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充电状态和充电结束状态指示 |
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软启动功能 |
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电池端过压保护 |
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工作环境温度：－40℃ 到 ＋85℃ |
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采用 10 管脚SSOP 封装 |
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产品无铅，满足 Rohs，不含卤素 |
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产品封装图： |
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产品原理图： |
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磷酸铁锂电池充电芯片选型指南： |
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型号 |
电池种类/串联数量 |
工作模式 |
最高输入电压 |
最大持续充电电流 |
充电结束判断 |
封装 |
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铅酸电池/12V |
开关模式 |
+30V |
4A |
浮充 |
SSOP10 |
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磷酸铁锂电池/1 |
开关模式 |
28V |
4A |
最小充电电流 |
SSOP10 |
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锂电池/1 |
开关模式 |
28V |
4A |
最小充电电流 |
SSOP10 |
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锂电池/1 |
线性模式 |
+6V |
600mA |
最小充电电流 |
SOP8 |
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锂电池/1 |
线性模式 |
+6V |
1A |
最小充电电流 |
DFN8 |
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多种电池 |
线性模式 |
+6V |
600mA |
恒流充电终止电压 |
SOP8 |
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锂电池、磷酸铁锂电池/多节 |
开关模式 |
+28V |
5A |
最小充电电流 可外部设置 |
TSSOP16 |
