本文介绍了ISL9220/ISL9220A主要特性,方框图以及单节和两节电池应用电路图。Intersil 公司的ISL9220/ISL9220A是高性价比单节和两节锂离子和锂聚合物电池的通用充电器,具有同步PWM技术,以最大化电源效率,从而最大限度降低了充电时间和热量。1.2MHz开关频率允许是用小型电感和电容。充电电流高达2A,充电精度0.5%,主要用在PDA和智能手机,MP3和PMP,手持GPS设备,数码相机和工业手持扫描仪。
ISL9220/ISL9220A主要特性:
? Highly Integrated Battery Charger IC
? Charges 1- and 2-Cell Li-ion or Li-Polymer Batteries
? Up to 2A Charge Current
? Synchronous Buck Topology with Integrated Power FETs
? 1.2MHz Switching Frequency
? 0.5% Charge Voltage Accuracy
? Programmable Input Current Limit with One External Resistor
? Thermistor Interface for Battery DetecTIon and Temperature Qualified Charging
? Two Status Outputs
? Programmable Charge Safety TImer
? Short-Circuit and Thermal ProtecTIon
? Small 4mmx4mm TQFN Package
? -40℃ to +85℃ OperaTIng Temperature Range
ISL9220/ISL9220A应用:
? PDAs and Smart Phones
? MP3 and Portable Media Players
? Handheld GPS Devices
? Digital Still Cameras
? Industrial Handheld Scanners
图1。ISL9220/ISL9220A方框图
图2。ISL9220/ISL9220A热敏电阻内部电路图
图3。ISL9220/ISL9220A单节电池应用电路图
图4。ISL9220/ISL9220A两节电池应用电路图