3MHz Synchronous Switch-Mode Battery Charger with Full USB Compliance and USB-OTG Boost Regulator CXLB7374 combine switch-mode battery charger and a boost regulator with fixed 3MHz switching frequenc

   产品概述 返回TOPuqx嘉泰姆

The CXLB7374 combine switch-mode battery charger and a boost regulator with fixed 3MHz switching frequency, which drives two integrated N-channel power MOSFETs. In battery charging, the high-efficiency step-down DC/DC converter is capable of delivering 1.5A output current over a wide input voltage range from 4V to 6V for CXLB7374, the step-down DC/DC converter is ideally suited for portable electronic devices that are powered from 1-cell Li-ion battery. The Charging parameters and operating modes can be programmed through an I 2C interface. The CXLB7374 has high accuracy regulation of input current, charge current and charge voltage. It equipped with charge termination, and charge status monitoring for battery detection. The CXLB7374charge the battery in three phases: conditioning, constant current and constant voltage. The CXLB7374features Dynamic Power Management (DPM) mode to accomplish input power limiting. The input current is limited to the value set by the I 2C host. This feature reduces battery charge current when the input power limit is reached to avoid overloading the AC adapter when supplying the load and the battery charger simultaneously. The charge termination is based on battery voltage, a programmed minimum current level and charge current termination bit set by the I 2C host. If the battery voltage falls below an internal threshold, the CXLB7374automatically restarts the charge cycle, and when the input voltage falls below the battery voltage, it will enter a low-quiescent current sleep mode. The CXLB7374supports the thermal regulation and over temperature protection to maintain the junction temperature of 120 oC by reducing charge current. The CXLB7374can operate as a boost regulator. To support USB OTG device, CXLB7374can provide VBUS (5.05V) by boosting the battery voltage. The CXLB7374is available in1.7mmx2.1mm WLCSP-20 and TQFN4x4-20A packages.

   产品特点 返回TOPuqx嘉泰姆

· Charge Faster Than Linear Charger uqx嘉泰姆

· 3MHz with 0% to 99.5% Duty Cycle Synchronous Switch-Mode Charger with 1.5A Integrated NMOSFETs uqx嘉泰姆

· 4V-6V Input Operating Range uqx嘉泰姆

· 20V Absolute Maximum Input Voltage uqx嘉泰姆

· Safety -Reverse leakage protection to prevent battery drainage uqx嘉泰姆

-Thermal regulation and protection uqx嘉泰姆

 -Input/output over-voltage protection uqx嘉泰姆

 -Cycle-by-cycle current limit uqx嘉泰姆

· Accuracy uqx嘉泰姆

 -+1% charge voltage regulation (0 to 85oC) uqx嘉泰姆

 -+5% charge current regulation uqx嘉泰姆

 -+5% input current regulation (100mA and 500mA) uqx嘉泰姆

· Built-In Input Current Sensing and Limiting uqx嘉泰姆

· Automatic Charging uqx嘉泰姆

· Programmable Through High-Speed I2C Interface(3.4Mb/s) uqx嘉泰姆

 -Input Current Limit uqx嘉泰姆

 -Fast-Charge and Termination Current uqx嘉泰姆

 -Charge Regulation Voltage uqx嘉泰姆

 -Weak Battery Voltage Threshold uqx嘉泰姆

 -VIN DPM Threshold uqx嘉泰姆

 -Termination Enable/Disable uqx嘉泰姆

-OTG Enable/Disable uqx嘉泰姆

 -Reset All Parameter Control uqx嘉泰姆

 -Safety Timer with Reset Control uqx嘉泰姆

· 5V, 500mA Boost Mode for USB OTG for 2.5V to 4.5V Battery Inputuqx嘉泰姆

· Available in 1.7mmx2.1mm WLCSP-20 and TQFN4x4-20A Packagesuqx嘉泰姆

   应用范围 返回TOPuqx嘉泰姆

· Cell Phones, Smart Phones and PDAs uqx嘉泰姆

· Tablet PC uqx嘉泰姆

· Portable Media Players, Handheld Deviceuqx嘉泰姆

   技术规格书（产品PDF) 返回TOP uqx嘉泰姆

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