CXLB7327A is a complete constant-current/constant voltage linear charger for single cell lithium-ion batteries. Furthermore the CXLB7327A is specifically designed to work within USB power specifications. No external sense resistor is needed and no blocking diode is required due to the internal PMOSFET architecture .Thermal feedback regulates the charge current to limit the die temperature during high power operation or high ambient temperature .The charge voltage is fixed at 4.2V,and the charge current can be programmed externally with a single resistor. The CXLB7327A automatically terminates the charge cycle when the charge current drops to 1/10th the programmed value after the final float voltage is reached. When the input supply (wall adapter or USB supply) is removed the CXLB7327A automatically enters a low current state dropping the battery drain current to less than 2μA.The CXLB7327A can be put into shutdown mode reducing the supply current to 55μA. Other features include charge current monitor, undervoltage lockout, automatic recharge and a status.
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目录
7.相关产品
产品概述
CXLB7327A is a complete constant-current/constant voltage linear charger for single cell lithium-ion batteries. Furthermore the CXLB7327A is specifically designed to work within USB power specifications. No external sense resistor is needed and no blocking diode is required due to the internal PMOSFET architecture .Thermal feedback regulates the charge current to limit the die temperature during high power operation or high ambient temperature .The charge voltage is fixed at 4.2V,and the charge current can be programmed externally with a single resistor. The CXLB7327A automatically terminates the charge cycle when the charge current drops to 1/10th the programmed value after the final float voltage is reached. When the input supply (wall adapter or USB supply) is removed the CXLB7327A automatically enters a low current state dropping the battery drain current to less than 2μA.The CXLB7327A can be put into shutdown mode reducing the supply current to 55μA. Other features include charge current monitor, undervoltage lockout, automatic recharge and a status.
产品特点
●Protection of battery cell reverse connection
●No MOSFET sense resistor or blocking diode required
●Complete Linear Charger in ThinSOT Package for Single Cell Lithium-Ion Batteries
●Constant-Current/Constant-Voltage operation with thermal regulation to maximize Rate Without risk of overheating.
● Preset 4.2V charge voltage with ±1% accuracy
● Automatic Recharge
●Charges Single Cell Li-Ion Batteries Directly from USB Port
●C/10 charge termination
● 55μA supply current in shutdown
● 2.9V trickle current charge threshold
● Soft-Start limits inrush current
●Charge Status Output Pin
●Available in SOT23-5 Package
应用范围
●Cellular Telephones, PDAs, MP3 Players
●Charging Docks and Cradles
●Bluetooth Applications
技术规格书（产品PDF)
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产品封装图
电路原理图
相关芯片选择指南
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| 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 | |||||||
