电池充电器的PWM输入看门狗保护

摘要：添加看门狗保护的充电器的输入电路免受损害了手机卫士，当基带处理档或停止软件的执行。

Maxim>AppNotes>BATTERYMANAGEMENTMICROPROCESSORSUPERVISORCIRCUITSKeywords:mobilephones,batterycharging,microprocessorsupervisors,pulse-widthmodulation,watchdogSep16,2005protectionAPPLICATIONNOTE3623Battery-ChargerPWMInputHasWatchdogProtectionAbstract:Addingwatchdogprotectiontothecharger-inputcircuitryofamobilephoneguardsagainstdamagewhenthebasebandprocessorstallsorceasessoftwareexecution.Mobile-phonebatteriesareusuallychargedthroughaproprietarychargingalgorithminthebasebandcontroller.Thephone'schargerinputisconnectedtotheinternalbatterythroughap-channelswitchoflowon-resistance,controlledbyapulse-widthmodulation(PWM)signalfromthebasebandcontroller(Figure1).Tominimizepowerdissi