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ElectricalCharacteristics
ReferenceSection
OscillatorSection
错误-amplifiersection
TL494
脉冲波-宽度-modulationcontrolcircuits
SLVS074E–JANUARY1983–REVISEDFEBRUARY2005
overrecommendedoperatingfree-airtemperaturerange,v
CC
=15v,f=10khz(unlessotherwisenoted)
tl494c,tl494i
PARAMETERTESTCONDITIONS
(1)
单位
MINTYP
(2)
最大值
outputvoltage(ref)i
O
=1ma4.7555.25v
InputregulationV
CC
=7Vto40V225mV
OutputregulationI
O
=1mAto10mA115mV
Outputvoltagechangewithtemperature
∆
T
一个
=mintomax210mv/v
短的-circuitoutputcurrent
(3)
REF=0V25mA
(1)forconditionsshownasminormax,usetheappropriatevaluespecifiedunderrecommendedoperatingconditions.
(2)alltypicalvalues,exceptforparameterchangeswithtemperature,areatt
一个
=25
°
c.
(3)durationofshortcircuitshouldnotexceedonesecond.
C
T
=0.01
µ
f,r
T
=12k
Ω
(seefigure1)
tl494c,tl494i
PARAMETERTESTCONDITIONS
(1)
单位
MINTYP
(2)
最大值
Frequency10kHz
Standarddeviationoffrequency
(3)
AllvaluesofV
CC
,c
T
,r
T
,andt
一个
constant100hz/khz
FrequencychangewithvoltageV
CC
=7vto40v,t
一个
=25
°
c1hz/khz
Frequencychangewithtemperature
(4)
∆
T
一个
=mintomax10hz/khz
(1)forconditionsshownasminormax,usetheappropriatevaluespecifiedunderrecommendedoperatingconditions.
(2)alltypicalvalues,exceptforparameterchangeswithtemperature,areatt
一个
=25
°
c.
(3)standarddeviationisameasureofthestatisticaldistributionaboutthemeanasderivedfromtheformula:
(4)temperaturecoefficientoftimingcapacitorandtimingresistorarenottakenintoaccount.
SeeFigure2
tl494c,tl494i
PARAMETERTESTCONDITIONSUNIT
MINTYP
(1)
最大值
InputoffsetvoltageV
O
(反馈)=2.5v210mv
InputoffsetcurrentV
O
(反馈)=2.5v25250na
InputbiascurrentV
O
(反馈)=2.5v0.21
µ
一个
–0.3to
一般-modeinputvoltagerangev
CC
=7Vto40VV
V
CC
–2
打开-loopvoltageamplification
∆
V
O
=3v,v
O
=0.5vto3.5v,r
L
=2k
Ω
7095dB
统一体-gainbandwidthv
O
=0.5vto3.5v,r
L
=2k
Ω
800kHz
一般-moderejectionratio
∆
V
O
=40v,t
一个
=25
°
C6580dB
outputsinkcurrent(反馈)v
ID
=–15mvto–5v,v(反馈)=0.7v0.30.7ma
outputsourcecurrent(反馈)v
ID
=15mvto5v,v(反馈)=3.5v–2ma
(1)alltypicalvalues,exceptforparameterchangeswithtemperature,areatt
一个
=25
°
c.
4
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