UCC1800 UCC2800 UCC3800

Texas Instruments, Incorporated [Slus270, C][M]

Description

Niveau: Supérieur, Doctorat, Bac+8
UCC1800/1/2/3/4/5 UCC2800/1/2/3/4/5 UCC3800/1/2/3/4/5 SLUS270C - MARCH 1999 - REVISED JANUARY 2005 FEATURES • 100µA Typical Starting Supply Current • 500µA Typical Operating Supply Current • Operation to 1MHz • Internal Soft Start • Internal Fault Soft Start • Internal Leading-Edge Blanking of the Current Sense Signal • 1 Amp Totem-Pole Output • 70ns Typical Response from Current-Sense to Gate Drive Output • 1.5% Tolerance Voltage Reference • Same Pinout as UC3842 and UC3842A DESCRIPTION The UCC1800/1/2/3/4/5 family of high-speed, low-power integrated cir- cuits contain all of the control and drive components required for off-line and DC-to-DC fixed frequency current-mode switching power supplies with minimal parts count. These devices have the same pin configuration as the UC1842/3/4/5 family, and also offer the added features of internal full-cycle soft start and internal leading-edge blanking of the current-sense input. The UCC1800/1/2/3/4/5 family offers a variety of package options, tem- perature range options, choice of maximum duty cycle, and choice of critical voltage levels.

• max min


• internal leading-edge


• vcc


• start threshold


• function function


• output frequency


• typ max


• current

Sujets

• Régulation
• Current

Informations

• Publié par: profil-zyak-2012
• Nombre de lectures: 19
• Langue: English

Extrait

elbaliavaOFNInoitacilpaUDG92009-3

SLUS270C
-MARCH1999-REVISEDJANUARY2005

Turn-OnThreshold
V2.7192..45VV
V1.4142..15VV

Turn-OffThreshold
V9.678..43VV
V6.383..36VV

ReferenceVoltage
V5V5V5V4V5V4

Low-PowerBiCMOSCurrent-ModePWM
FEATURESDESCRIPTION
•
100
µ
ATypicalStartingSupplyCurrentTheUCC1800/1/2/3/4/5familyofhigh-speed,low-powerintegratedcir-
cuitscontainallofthecontrolanddrivecomponentsrequiredforoff-line
•
500
µ
ATypicalOperatingSupplyandDC-to-DCfixedfrequencycurrent-modeswitchingpowersupplies
Currentwithminimalpartscount.
•
Operationto1MHzThesedeviceshavethesamepinconfigurationastheUC1842/3/4/5
•
InternalSoftStartfamily,andalsooffertheaddedfeaturesofinternalfull-cyclesoftstart
andinternalleading-edgeblankingofthecurrent-senseinput.
•
InternalFaultSoftStart
TheUCC1800/1/2/3/4/5familyoffersavarietyofpackageoptions,tem-
•
InternalLeading-EdgeBlankingoftheperaturerangeoptions,choiceofmaximumdutycycle,andchoiceof
CurrentSenseSignalcriticalvoltagelevels.LowerreferencepartssuchastheUCC1803and
•
1AmpTotem-PoleOutputUCC1805fitbestintobatteryoperatedsystems,whilethehigherrefer-
enceandthehigherUVLOhysteresisoftheUCC1802andUCC1804
•
70nsTypicalResponsefrommaketheseidealchoicesforuseinoff-linepowersupplies.
Current-SensetoGateDriveOutput
TheUCC180xseriesisspecifiedforoperationfrom55
o
Cto+125
o
C,
•
1.5%ToleranceVoltageReferencetheUCC280xseriesisspecifiedforoperationfrom40
o
Cto+85
o
C,and
oo•
SamePinoutasUC3842andtheUCC380xseriesisspecifiedforoperationfrom0Cto+70C.
UC3842A
PartNumberMaximumDutyCycle
UCCx800100%
UCCx80150%
UCCx802100%
UCCx803100%
UCCx80450%
UCCx80550%
BLOCKDIAGRAM

UUCCCC21880000//11//22//33//44//55
UCC3800/1/2/3/4/5

EGNARERUTAREPMET08EGAKCAPNOITPOTCUDORPCCU43215678DNGTUOCCVFERCRSCBFPMOCCRSCPMOCBF56784321DNGFERCVTUOLCC-20
(TOPVIEW)
LPackage

PACKAGEPINFUNCTION
FUNNC/CTIONP1IN
CNo/mCp32-4
NF/BC65
7SCNR/CC81-09
11C/NPWGRNGDND1132
ON/UCT1145
VNC/CC1176
RN/ECF182-019

TEMPERATUREANDPACKAGESELECTION
TemperatureRangeAvailablePackages
UCC180X55°Cto+125°CJ,L
UCC280X40°Cto+85°CN,D,PW
UCC380X0°Cto+70°CN,D,PW
ORDERINGINFORMATION

JDIoLr-8N,,SDOIPCa-c8k(aTgoepView)

ABSOLUTEMAXIMUMRATINGS(Note1)CONNECTIONDIAGRAMS
V
CC
Voltage(Note2)............................12.0V
V
CC
Current(Note2)..........................30.0mA
TSSOP-8(TopView)
OUTCurrent...................................
±
1.0A
PWPackage
OUTEnergy(CapacitiveLoad)...................20.0
µ
J
AnalogInputs(FB,CS)....................0.3Vto6.3V
PowerDissipationatT
A
<+25°C(NorJPackage).....1.0W
PowerDissipationatT
A
<+25°C(DPackage)........0.65W
PowerDissipationatT
A
<+25°C(LPackage).......1.375W
StorageTemperatureRange.............

65°Cto+150°C
LeadTemperature(Soldering,10Seconds)........+300°C
Note1:Valuesbeyondwhichdamagemayoccur.Allvoltages
arewithrespecttoGND.Allcurrentsarepositiveinto
thespecifiedterminal.ConsultUnitrodedatabookfor
informationregardingthermalspecificationsandlimita-
tionsofpackages.
Note2:InnormaloperationV
CC
ispoweredthroughacurrent
limitingresistor.Absolutemaximumof12Vapplies
whenV
CC
isdrivenfromalowimpedancesourcesuch
thatI
CC
doesnotexceed30mA(whichincludesgate
drivecurrentrequirement).Theresistorshouldbe
sizedsothattheV
CC
voltage,underoperatingcondi-
tionsisbelow12Vbutabovetheturnoffthreshold.

UUCCCC12880000//11//22//33//44//55
UCC3800/1/2/3/4/5

2

UCC1800/1/2/3/4/5
UCC2800/1/2/3/4/5
UCC3800/1/2/3/4/5
ELECTRICALCHARACTERISTICS
Unlessotherwisestated,thesespecificationsapplyfor55
°
C
≤
T
A
≤
+125°Cfor
CUTC=C313800pxF;fro40m°CR
≤
CTto
A
≤
GN+8D5;°0C.1forFUcaCpCa2c8it0oxr;fr0o°mC
≤
V
C
T
CA
t
≤
o+G7N0°DC;0f.o1rUFCcCa3p8a0cxit;oVr
C
fr
C
o=m10VV
R
(
E
N
F
ottoeG3)N;DR.TT=
A
1=0T0
J
.kfromREFtoRC;
PARAMETERTESTCONDITIONSUCC180XUCC380XUNITS
UCC280X
MINTYPMAXMINTYPMAX
4.9255.005.0754.9255.005.075V
3.944.004.063.944.004.06
10301025mV
1.91.9mV/V
2.52.1mV/V
4.885.005.104.885.005.10V
3.904.004.083.904.004.08V
130130
µ
V
Vm55535535mA
404652404652kHz
263136263136kHz
2.52.5%
2.252.402.552.252.402.55V
2.452.45V
2.442.502.562.442.502.56V
1.952.02.051.952.02.05

11

11
µ
A
60806080dB
0.33.50.42.5mA
0.20.50.80.20.50.8mA
zHM2297991009799100%
484950484950
%001.101.651.801.101.651.80V/V
0.91.01.10.91.01.1V

200200

200200nA
5010015050100150ns
1.421.551.681.421.551.68V
0.450.901.350.450.901.35V

ReferenceSection
OutputVoltage
LoadRegulation
LineRegulation
TotalVariation
OutputNoiseVoltage
LongTermStability
OutputShortCircuit
OscillatorSection
OscillatorFrequency
TemperatureStability
Amplitudepeak-to-peak
OscillatorPeakVoltage
ErrorAmplifierSection
InputVoltage
InputBiasCurrent
OpenLoopVoltageGain
COMPSinkCurrent
COMPSourceCurrent
GainBandwidthProduct
PWMSection
MaximumDutyCycle
MinimumDutyCycle
CurrentSenseSection
niaGMaximumInputSignal
InputBiasCurrent
CSBlankTime
Over-CurrentThreshold
COMPtoCSOffset

T
J
=+25°C,I=0.2mA,UCCx800/1/2/4
T
J
=+25°C,I=0.2mA,UCCx803/5
0.2mA<I<5mA
T
J
=+25
°
C,
V
CC
=10VtoClamp(I
VCC
=25mA)
T
J
=55°Cto+125°C,
V
CC
=10VtoClamp(I
VCC
=25mA)
UCCx800/1/2/4(Note7)
UCCx803/5(Note7)
10Hz
≤
f
≤
10kHz,T
J
=+25°C(Note9)
T
A
=+125°C,1000Hours(Note9)
UCCx800/1/2/4(Note4)
UCCx803/5(Note4)
(Note9)
COMP=2.5V;UCCx800/1/2/4
COMP=2.0V;UCCx803/5
FB=2.7V,COMP=1.1V
FB=1.8V,COMP=REF1.2V
(Note9)
UCCx800/2/3
UCCx801/4/5
COMP=0V
(Note5)
COMP=5V(Note6)
V0=SC

3

UCC1800/1/2/3/4/5
UCC2800/1/2/3/4/5
UCC3800/1/2/3/4/5
U
E
C
L
C
E
1
C
80
T
x;
RI

C
40
A
°
L
C
≤
C
T
H
A
A
≤
R
+8
A
5°
C
C
T
f
E
or
R
U
IS
CC
TI
2
C
80
S
x;U0nl°eCss
≤
oTt
A
he
≤
r+wi7s0e°CstfaotredU,CthCe3s8e0sx;peVc
C
if
C
ic=a1ti0oVns(Naoptpely3)f;orRT=551
°
0C0k
≤
fTro
A
m
≤
+R1E2F5t°oCRfoCr;
CT=330pFfromRCtoGND;0.1FcapacitorfromV
CC
toGND;0.1FcapacitorfromV
REF
toGND.T
A
=T
J
.
PARAMETERTESTCONDITIONSUUCCCC218800XXUCC380XUNITS
OutputSection
OUTLowLevelI=20mA,allparts0.10.40.10.4V
I=200mA,allparts0.350.900.350.90V
I=50mA,VCC=5V,UCCx803/50.150.400.150.40V
I=20mA,VCC=0V,allparts0.71.20.71.2V
(OVUT-HOiUghT)V
SAT
I=20mA,allparts0.150.400.150.40V
CC
I=200mA,allparts1.01.91.01.9V
I=50mA,VCC=5V,UCCx803/50.40.90.40.9V
RiseTimeC
L
=1nF41704170ns
FallTimeC
L
=1nF44754475ns
UndervoltageLockoutSection
StartThreshold(Note8)UCCx8006.67.27.86.67.27.8V
UCCx8018.69.410.28.69.410.2V
UCCx802/411.512.513.511.512.513.5V
UCCx803/53.74.14.53.74.14.5V
StopThreshold(Note8)UCCx18006.36.97.56.36.97.5V
UCCx18016.87.48.06.87.48.0V
UCCx802/47.68.39.07.68.39.0V
UCCx803/53.23.64.03.23.64.0V
UndervoltageLockoutSection(cont.)
StarttoStopHysteresisUCCx8000.120.30.480.120.30.48V
UCCx8011.622.41.622.4V
UCCx802/43.54.25.13.54.25.1V
UCCx803/50.20.50.80.20.50.8V
SoftStartSection
COMPRiseTimeFB=1.8V,Risefrom0.5VtoREF1V410410ms
OverallSection
Start-upCurrentV
CC
<StartThreshold0.10.20.10.2mA
OperatingSupplyCurrentFB=0V,CS=0V0.51.00.51.0mA
VCCInternalZenerVoltageI
CC
=10mA(Note8),(Note10)1213.5151213.515V
VCCInternalZenerVoltageMinusUCCx802/4(Note8)0.51.00.51.0V
StartThresholdVoltage
Note3:AdjustVCCabovethestartthresholdbeforesettingat10V.
Note4:OOsscciillllaattoorrffrreeqquueennccyyffoorrtthheeUUCCCCxx880001,,UUCCCCxx880024aannddUUCCCCxx880035iisstthweicoeutthpeutofurtepquutefrnecqy.uency.
Note5:Gainisdefinedby:
A
=∆
V
COMP
0
≤
V
CS
≤
0.8
V
.
∆VSCNote6:ParametermeasuredattrippointoflatchwithPin2at0V.
NNoottee87::STtoatratlTVharrieastihoonldi,ncSltuodpeTshtreemshpoelrdataunredsZteanbielirtySahnudntloTahdrersehgoulldastitorna.ckoneanother.
Note9:Guaranteedbydesign.Not100%testedinproduction.
Note10:Thedeviceisfullyoperatinginclampmodeastheforcingcurrentishigherthanthenormaloperatingsupplycurrent.
4

PINDESCRIPTIONS