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AbsoluteMaximumRatings
(1)
RecommendedOperatingConditions
TL494
脉冲波-宽度-modulationcontrolcircuits
SLVS074E–JANUARY1983–REVISEDFEBRUARY2005
overoperatingfree-airtemperaturerange(unlessotherwisenoted)
MINMAXUNIT
V
CC
Supplyvoltage
(2)
41V
V
I
AmplifierinputvoltageV
CC
+0.3v
V
O
Collectoroutputvoltage41V
I
O
Collectoroutputcurrent250mA
Dpackage73
DBpackage82
θ
JA
Packagethermalimpedance
(3)(4)
Npackage67
°
c/w
NSpackage64
PWpackage108
leadtemperature1,6mm(1/16inch)fromcasefor10seconds260
°
C
T
stg
Storagetemperaturerange–65150
°
C
(1)stressesbeyondthoselistedunder"absolutemaximumratings"maycausepermanentdamagetothedevice.thesearestressratings
仅有的,andfunctionaloperationofthedeviceattheseoranyotherconditionsbeyondthoseindicatedunder"recommendedoperating
情况"isnotimplied.exposuretoabsolute-最大-ratedconditionsforextendedperiodsmayaffectdevicereliability.
(2)allvoltagesarewithrespecttothenetworkgroundterminal.
(3)maximumpowerdisipationisafunctionoft
J
(最大值),
θ
JA
,andt
一个
.themaximumallowablepowerdissipationatanyallowableambient
temperatireisP
D
=(t
J
(最大值)–t
一个
)/
θ
JA
.operatingattheabsolutemaximumt
J
of150
°
ccanaffectreliability.
(4)thepackagethermalimpedanceiscalculatedinaccordancewithjesd51-7.
MINMAXUNIT
V
CC
Supplyvoltage740V
V
I
amplifierinputvoltage–0.3v
CC
–2V
V
O
Collectoroutputvoltage40V
collectoroutputcurrent(eachtransistor)200ma
currentintofeedbackterminal0.3ma
f
OSC
Oscillatorfrequency1300kHz
C
T
timingcapacitor0.4710000nf
R
T
timingresistor1.8500k
Ω
TL494C070
T
一个
operatingfree-airtemperature
°
C
TL494I–4085
3
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