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ElectricalCharacteristics
OutputSection
dead-timecontrolsection
PWMComparatorSection
TotalDevice
SwitchingCharacteristics
TL494
脉冲波-宽度-modulationcontrolcircuits
SLVS074E–JANUARY1983–REVISEDFEBRUARY2005
overrecommendedoperatingfree-airtemperaturerange,v
CC
=15v,f=10khz(unlessotherwisenoted)
PARAMETERTESTCONDITIONSMINTYP
(1)
MAXUNIT
collectoroff-statecurrentv
CE
=40v,v
CC
=40V2100
µ
一个
emitteroff-statecurrentv
CC
=V
C
=40v,v
E
=0–100
µ
一个
CommonemitterV
E
=0,i
C
=200ma1.11.3
集电级-emittersaturationvoltagev
EmitterfollowerV
o(c1orc2)
=15v,i
E
=–200ma1.52.5
OutputcontrolinputcurrentV
I
=V
ref
3.5ma
(1)alltypicalvalues,exceptfortemperaturecoefficient,areatt
一个
=25
°
c.
SeeFigure1
PARAMETERTESTCONDITIONSMINTYP
(1)
MAXUNIT
inputbiascurrent(dead-timectrl)v
I
=0to5.25v–2–10
µ
一个
V
I
(dead-timectrl)=0,c
T
=0.01
µ
f,
maximumdutycycle,eachoutput45%
R
T
=12k
Ω
zerodutycycle33.3
inputthresholdvoltage(dead-timectrl)v
Maximumdutycycle0
(1)alltypicalvalues,exceptfortemperaturecoefficient,areatt
一个
=25
°
c.
SeeFigure1
PARAMETERTESTCONDITIONSMINTYP
(1)
MAXUNIT
inputthresholdvoltage(反馈)zerodutycyle44.5v
inputsinkcurrent(反馈)v(反馈)=0.7v0.30.7ma
(1)alltypicalvalues,exceptfortemperaturecoefficient,areatt
一个
=25
°
c.
PARAMETERTESTCONDITIONSMINTYP
(1)
MAXUNIT
V
CC
=15V610
R
T
=V
ref
,
StandbysupplycurrentmA
Allotherinputsandoutputsopen
V
CC
=40V915
AveragesupplycurrentV
I
(dead-timectrl)=2v,seefigure17.5ma
(1)alltypicalvalues,exceptfortemperaturecoefficient,areatt
一个
=25
°
c.
T
一个
=25
°
C
PARAMETERTESTCONDITIONSMINTYP
(1)
MAXUNIT
Risetime100200ns
一般-emitterconfiguration,seefigure3
Falltime25100ns
Risetime100200ns
发射级-followerconfiguration,seefigure4
Falltime40100ns
(1)alltypicalvalues,exceptfortemperaturecoefficient,areatt
一个
=25
°
c.
5
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