MOSFET驱动器是电池反向保护

摘要：MOSFET功率开关驱动器必须从电池反向连接保护。一个小的整流二极管可以防止逆转的电池，但这种做法是不可接受的一般系统中，电池的寿命是至关重要的。二极管的正向压降（0.6V至0.7V典型值）为6V电池，产生了约10％的恒功率的损失，这与日益减少的电池电压增加。比单二极管保护的改进。

Maxim>AppNotes>BATTERYMANAGEMENTPOWER-SUPPLYCIRCUITSKeywords:MOSFETdriver,reversebatteryprotection,mosfet,reversebatteryprotected,powerswitchMay11,2003drivers,diodeprotectionAPPLICATIONNOTE2012MOSFETDriverIsReverse-BatteryProtectedAbstract:MOSFETpower-switchdriversmustbeprotectedfromareverse-batteryconnection.Asmallrectifierdiodecanprotectagainstreversedbatteries,butthatapproachisgenerallyunacceptableforsystemsinwhichbatterylifeiscrucial.Fora6Vbattery,thediode'sforwardvoltagedrop(0.6Vto0.7Vtypical)producesaconstantpowerlossofapproximately10%,whichincreaseswithdwindlingbatteryvoltage.Animprovementoversingle-diodeprotectionisshown.MOSFETpower-switchdriversmustbeprotected