双通道比较器热保护锂离子电池

池充电电路的一套安全温度限制。单节锂离子（锂离子）电池充电器可从USB端口或外部电源供电。Maxim/Dallas>AppNotes>AUTOMOTIVEKeywords:batterycharger,thermalprotection,Li+,lithiumion,safety,settemperaturelimits,thermistor,Oct01,2003dualcomparator,windowcomparator,batterychargingAPPLICATIONNOTE2769DualComparatorThermallyProtectsLi+BatteryAdualcomparatorandthermistorsetsafetemperaturelimitsforalithium-ionbatterychargingcircuit.Thesingle-celllithium-ion(Li+)batterychargercanbepoweredfromaUSBportorexternalsupply.MostmanufacturersrecommendthatLi+(lithium-ion)batteriesnotbechargedbelow0°Corabove+50°C.Youcanmonitorbothoftheselimitsbyaddingathermistoranddual(window)comparatortoaLi+batterycharger(Figure1).Figure1.ThislithiumbatterychargerderivesitspowerfromfromaUSB