在智能电源选择器 ™ 的充电器,外部 MOSFET 减少了 I²R 损失

摘要：产品系统电池（蝙蝠SYS）连接阻抗是至关重要的通过减少净空高度和耗散功率影响电池运行时。外部通晶体管降低了50%以上的阻抗。本应用指南显示MAX8662电源管理IC智能电源选择器功能驱动器与外部MOSFET减少开关电阻和功率耗散。显示性能数据。

Maxim>AppNotes>BatteryManagementKeywords:battery,loadswitch,efficiency,chargerDec15,2010APPLICATIONNOTE4656ExternalMOSFETReducesIRLossesinSmartPowerSelector-BasedChargersBy:HubertBugajskiAbstract:Battery-to-system(BAT-to-SYS)connectionimpedanceiscriticalandaffectsbatteryruntimebyreducingheadroomanddissipatingpower.Anexternalpasstransistorlowerstheimpedancebymorethan50%.ThisapplicationnoteshowstheMAX8662power-managementICwithSmartPowerSelectorfunctionalitydrivesanexternalMOSFETtoreduceswitchresistanceandpowerdissipation.Performancedataareshown.ThisdesignideaappearedintheNovember15,2010issueofEETimes.IntroductionMost