Cxlb7328 is a complete linear charger with constant current / constant voltage for single lithium-ion battery. Among them, thinshot packaging and a small number of external components make the cxlb7328 an ideal choice for portable applications. And cxlb7328 is designed to work within the USB power specification.
Because of the internal MOSFET architecture, no external detection resistor and isolation diode are needed. Thermal feedback can adjust the charging current to limit the chip temperature under high power operation or high ambient temperature. The charging voltage is fixed at 4.2V, and the charging current can be set externally through a resistor. When the charging current drops to 1 / 10 of the set value after reaching the final floating charge voltage, the cxlb7328 will automatically terminate the charging cycle.
When the input voltage (AC adapter or USB power supply) is removed, the cxlb7328 automatically enters a low current state, reducing the battery leakage current to less than 2 μ a, placing the cxlb7328 in shutdown mode, thus reducing the power supply current to 55 μ a.
Other features of the cxlb7328 include a charging current monitor, undervoltage lockout, automatic recharging, and a status pin to indicate the end of charging and input voltage access.

-
"
目录
7.相关产品
产品概述
CXLB7328 是一款完整的单节锂离子电池用恒定电流/ 恒定电压线性充电器。其中 ThinSOT 封装与较少的外部 元器件数目使得 CXLB7328 成为便携式应用的理想选择。 而且 CXLB7328 是专为在 USB 电源规范内工作而设计的。
由于采用内部 MOSFET 构架,所以不需要外部检测 电阻器和隔离二极管。热反馈可对充电电流进行调节以便 在大功率操作或高环境温度条件下对芯片温度加以限制。 充电电压固定为 4.2V,而充电电流可通过一个电阻器进 行外部设置。当充电电流在达到最终浮充电压之后降至设 定值的 1/10 时,CXLB7328 将自动终止充电循环。
当输入电压(交流适配器或 USB 电源)被拿掉时, CXLB7328 自动进入一个低电流状态,将电池漏电流降至 2μA 以下,可将CXLB7328置于停机模式,从而将供电电 流降至 55μA。
CXLB7328 的其他特点包括充电电流监控器、欠压闭 锁、自动再充电和一个用于指示充电结束和输入电压接入 的状态引脚。
产品特点
●可编程充电电流范围:CXLB7328A 50-800mA
CXLB7328B 20-800mA
●充电终止:CXLB7328A C/10 充电终止CXLB7328B 3C/10 充电终止
●充电状态输出引脚,LED 开/关两种状态
●无需 MOSFET、检测电阻器和隔离二极管
●用于单节锂离子电池、采用 ThinSOT 封装的完整线 性充电器
●恒定电流/恒定电压操作,并具有可在无过热危险的 情况下实现充电速率最大化的热调节功能
●直接从 USB 端口给锂离子电池充电
● 精度达 1%的 4.2V 预设充电电压
●用于电池电量检测的充电电流监控器输出
●自动再充电
●停机模式下供电电流为 55μA
● 2.9V 涓流充电门限
●软启动限制了浪涌电流
应用范围
●充电座
● SOT23-5
●蓝牙应用
技术规格书(产品PDF)
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!
产品封装图

电路原理图
相关芯片选择指南
更多同类产品......Li-ion Battery Charger(锂电池充电芯片) | |||||||
Part Number | VFLOAT | VIN | Max Charger | Charger | Accu. | IQ | Package |
Type | |||||||
CXLB7326 | 4.2V | 4.25-6.5V | 800mA | Linear | ±1% | 25uA | SOT23-5 |
CXLB7327 | 4.2V | 4.25-6.5V | 800mA | Linear | ±1% | 55uA | SOT23-5 |
CXLB7328 | 4.2V | 4.25-6.5V | 800mA | Linear | ±1% | 55uA | SOT23-5 |
CXLB7329 | 4.2V | 4.25-6.5V | 800mA | Linear | ±1% | 55uA | SOT23-6 |
CXLB7330 | 4.2V/4.34V | 4.25-6.5V | 1000mA | Linear | ±1% | 55uA | ESOP8 |
CXLB7331 | 4.2V/4.34V | 4.25-6.5V | 1000mA | Linear | ±1% | 55uA | ESOP8 |
CXLB7332 | 8.4V/8.7V | 4.7-20V | 2000mA | Switch | ±1% | 10uA | SOP8 |
CXLB7333 | 4.2V/4.34V | 4.7-5.5V | 2000mA | Switch | ±1% | 1uA | ESOP8 |
Applications:①Mobile phone②MID③PDA④Battery Charger⑤Bluetooth equipment |