www.德州仪器.com
C
O
C
O
V
输出
地
V
DD
V
DD
/2
常规的
V
输出
地
V
DD
V
DD
/2
V
偏差
V
DD
/2
地
V
DD
−V
SS
地
V
偏差
ChargePumpFlyingCapacitorandPVSSCapacitor
TPA4411
SLOS430–AUGUST2004
applicationinformation(持续)
figure64.amplifierapplications
thechargepumpflyingcapacitorservestotransferchargeduringthegenerationofthenegativesupplyvoltage.
ThePVSScapacitormustbeatleastequaltothechargepumpcapacitorinordertoallowmaximumcharge
转移.lowesrcapacitorsareanidealselection,andavalueof2.2µfistypical.capacitorvaluesthatare
smallerthan2.2µfcanbeused,butthemaximumoutputpowerisreducedandthedevicemaynotoperateto
规格.figures65through75comparetheperformanceofthetpa4411withtherecommended2.2-µf
capacitorsand1-µfcapacitors.
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