Dual-Input, USB/AC Adapter, 1-Cell Li+ Charger with OVP and Thermal Regulation CXLB7370 charges a single-cell Li+ battery from both USB and AC adapter sources. It also includes batteryto-input power

   产品概述 返回TOPiKf嘉泰姆

The CXLB7370 charges a single-cell Li+ battery from both USB and AC adapter sources. It also includes batteryto-input power switchover, therefore, the system can be powered directly from the power source rather than from the battery. In its simplest application, the CXLB7370 doesn’t need external MOSFET or diodes and accepts input voltages up to 6.5V; however, DC input over-voltage protection up to 18V can be added with a single SOT PFET. On-chip thermal limiting simplifies PC board layout and allows optimum charging rate without the thermal limits imposed by worst-case battery and input voltage. When the CXLB7370 thermal limit is reached, the charger does not shut down but simply reduces charging current. Ambient or battery temperature can be monitored with an external thermistor. When the temperature is out of range, charging pauses. Other features include STAT 1 and STAT 2 outputs indicating various charge status. DC power-OK (DCOK), USB power-OK (UOK), and poweron (PON) outputs indicate when valid power is present. These outputs drive logic or power-selection MOSFETs to disconnect the charging sources from the load and to protect the CXLB7370 from overvoltage. The CXLB7370 doesn’t contain logic for communication with the USB host. It must receive instructions from a local microcontroller. The CXLB7370is available in 16-pin 5mmx5mm QFN and 4mmx4mm TQFN packages and operates over the -40°C to +85°C temperature range.

   产品特点 返回TOPiKf嘉泰姆

· Charge from USB or AC Adapter iKf嘉泰姆

· Accurate BATT Regulation Voltage iKf嘉泰姆

· Programmable DC Charging Current iKf嘉泰姆

· Selectable USB Charging Current (Either 100mA or 500mA) iKf嘉泰姆

· Thermal Regulation for Simplified Board Design iKf嘉泰姆

· Input Protection Up to 18V iKf嘉泰姆

· Soft-Start iKf嘉泰姆

· External Thermistor Monitoring iKf嘉泰姆

· Charge Shutdown Control iKf嘉泰姆

· Charge Status Outputs iKf嘉泰姆

· DC and USB Power-OK Indicators iKf嘉泰姆

· Small, High Power QFN5x5-16 and TQFN4x4-16 Packages iKf嘉泰姆

· Lead Free and Green Devices Available (RoHS Compliant)iKf嘉泰姆

   应用范围 返回TOPiKf嘉泰姆

· Smart Phones and PDAs iKf嘉泰姆

· Wireless Appliances iKf嘉泰姆

· Digital Still Camera iKf嘉泰姆

· Internet AppliancesiKf嘉泰姆

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