Fully Integrated Switch-Mode ChargerWith USB Compliance and USB-OTG Support CXLB7384 is a compact, flexible, high‐efficiency, USB‐friendly switch‐mode charge management device for single‐cell Li‐ion

   产品概述 返回TOPkcn嘉泰姆

The CXLB7384 is a compact, flexible, high‐efficiency, USB‐friendly switch‐mode charge management device for single‐cell Li‐ion and Li‐polymer batteries used in a wide range of portable applications. The charge parameters can be programmed through an I 2 C interface. The IC integrates a synchronous PWM controller, power MOSFETs, input current sensing, high‐accuracy current and voltage regulation, and charge termination, into a small WCSP package.    The IC charges the battery in three phases: conditioning, constant current and constant voltage. The input current is automatically limited to the value set by the host. Charge is terminated based on battery voltage and user‐selectable minimum current level. A safety timer with reset control provides a safety backup for I 2 C interface. During normal operation, The IC automatically restarts the charge cycle if the battery voltage falls below an internal threshold and automatically enters sleep mode or high impedance mode when the input supply is removed. The charge status can be reported to the host using the I 2 C interface. During the charging process, the IC monitors its junction temperature (TJ) and reduces the charge current once TJ increases to about 125°C. To support USB OTG device, CXLB7384 can provide VBUS (5.05V) by boosting the battery voltage. The IC is available in 20‐pin WCSP package.   

   产品特点 返回TOPkcn嘉泰姆

z Power Up System without Battery    kcn嘉泰姆

z Charge Faster than Linear Chargers    kcn嘉泰姆

z High‐Accuracy Voltage and Current Regulation    kcn嘉泰姆

Input Current Regulation Accuracy: ±5%(100 mA and 500 mA)    kcn嘉泰姆

Charge Voltage Regulation Accuracy:    ±0.5% (25°C), ±1% (0°C to 125°C)Charge Current Regulation Accuracy: ±5%    kcn嘉泰姆

z Input Voltage Based Dynamic Power Management (VIN DPM) kcn嘉泰姆

z Bad Adaptor Detection and Rejection kcn嘉泰姆

z Safety Limit Register for Maximum Charge Voltage and Current Limiting    kcn嘉泰姆

z High‐Efficiency Mini‐USB/AC Battery Charger for Single‐Cell Li‐Ion and Li‐Polymer Battery    Packs    kcn嘉泰姆

z 20‐V Absolute Maximum Input Voltage Rating    kcn嘉泰姆

z 6.5‐V Maximum Operating Input Voltage    kcn嘉泰姆

z Built‐In Input Current Sensing and Limiting    kcn嘉泰姆

z Integrated Power FETs for Up To 1.25‐A Charge Rate    kcn嘉泰姆

z Programmable Charge Parameters through I 2 C™ Compatible Interface (up to 3.4 Mbps):   kcn嘉泰姆

 Input Current Limit VIN DPM Threshold    kcn嘉泰姆

Fast‐Charge/Termination Current    kcn嘉泰姆

Charge Regulation Voltage (3.5 V to 4.44 V)    kcn嘉泰姆

Low Charge Current Mode Enable/Disable   kcn嘉泰姆

Termination Enable/Disable    kcn嘉泰姆

z Synchronous Fixed‐Frequency PWM Controller Operating at 3 MHz With 0% to 99.5% Duty Cycle z Automatic High Impedance Mode for Low Power Consumption    kcn嘉泰姆

z Robust Protection    kcn嘉泰姆

Reverse Leakage Protection Prevents Battery Drainage Thermal Regulation and Protection   kcn嘉泰姆

 Input/Output Overvoltage Protection    kcn嘉泰姆

z Status Output for Charging and Faults   kcn嘉泰姆

 z USB Friendly Boot‐Up Sequence kcn嘉泰姆

z Automatic Charging    kcn嘉泰姆

z Boost Mode Operation for USB OTG    kcn嘉泰姆

Input Voltage Range (from Battery): 3.2 V to 4.5V kcn嘉泰姆

z 2.1 mm x 2 mm 20‐Pin WCSP Packagekcn嘉泰姆

   应用范围 返回TOPkcn嘉泰姆

z Mobile and Smart Phones kcn嘉泰姆

z M3 Players    kcn嘉泰姆

z Handheld Devices   kcn嘉泰姆

   技术规格书（产品PDF) 返回TOP kcn嘉泰姆

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