n"E.44BB. p@pAA B4B4Bp4BH4B 4B4B4B 4B4B A4BA4BA4B B4BHB4BpB4BB BBABpAB@BBpBB B4B4pB4HB4 B4A4A4 A44 444 4H4p4VREFVCCOUTBVCPGNDOUTAGNDILIMSSRAMPCTRTCLK/LEBEAOUTNIINV+)C:\psimwork\PWM-IC\UC3823_25\UC3825A.sch UC2825A.sch DD@{?V.TIMEh㈵>{Gz?GroundR DIODESSWIVDC&COMP'SUM2(SUM2P/ANDGATE0ORGATE1NOTGATE2 NANDGATE4SRFF5JKFFEVSENGONCTRLJCTOPQVVCVSSIVCCS\ICCCS`IDCORGATE3 OP_AMP_2_CCCCCC??%D hVDC1ffffff@|@eCޭCC CCaC??2.8 Courier NewOCF5OCAF5AOCA_YDD^DD\D@ D??%D hVDC2?z_D+7 DaDHD;`D@ D??1 Courier NewF5F5F5@F5A5@_pC CC CCC??%D hVDC4333333@|Bx~C= ChC;0CiCC??GD hON2kAC B4CAC??1D hR4R@`-|we4BhCB"C`?bBC??10k Courier New?6?6A@?6AR4B AC B??'BABACAB??@NCBC CC C?&D hCOMP3LDCDC@ DC??0D hOR1MDCDD@ DD??/D hAND1MDDDD@ D D??/D hAND2MDC*DC#DC??/D hAND3MDCDCDC??1D hNOT1MDC*D D#DD??D hOR31LD D'DD@!DD??0D hOR2BDDDDDD??ABD DD DD D?? ABDDDDDD?? ABDDD DD D?? ABDDD DD@D??ppA\;DCHDCADC?4"D hSRFF2PNM/DC;DC@5DC??/D hAND4M*DC/DD,DC??1D hNOT2B*DC/DC,DC?? AB,DC/DC-DC??@B*DD,DD@+DD??@B,DD;DD4DD??AMJDCWDDPDC??D hOR32N^DCkDDdDC??5D hJKFF1MuDCDD@{DC??D hOR33MuDCDC@{DC??D hOR34MDCDC@DC??1D hNOT3MDCDC@DC??1D hNOT44@DC@DCDC??4@DC@DCDC?? BCCDC@DC??ppABCCC DCD??ABC DD D@D D??ppABDCDCDC??@BDCDDDD?? BBDDDDDD??@BDCDCDC?? A BDCDDDC??AB DDDDDD?? AuCDLD5D˝ChD??PWM_IN Courier NewOF5OAF5AOABDDJDD@0DD??BB%DDDDD D??AN3C DCDCD??&D hCOMP4r6C DCDC@ D??(8D hSUMP1a?a?_8C DCDC D??%D hVDC6?}JeCDQC[DCD??1.25 Courier NewF5F5F5AF5A@5A8B?CDCDC@D??@B@zCDCDCD??B`AHCDzCDaCD??E&D hVSEN3A"0?4DD AD D??!`ECDC"DCD??E&D hVSEN4A"0?4D AD D??)4%D A*D 'D??+4*D A/D ,D??-afC9DCCDuC>D?Q'D hVVCVS2A"0?zVC+;DC@DC>D??1 Courier NewF5F5F5@F5A@5@A"0gfC*DzC6DpC@0D? -D hD6`-BpCCDpCEDpC@DD??@NCWDCaDC\D??&D hCOMP5NChDCrDCmD??&D hCOMP6NCzDCDCD??&D hCOMP7_zCmDCrDCpD??%D hVDC8333333?|$iۍCpDgCuDCrD??1.2 Courier NewOCF5OCAF5AOCABfCYDfCkDfC@bD?? B`4CTDfC^DMCYD??E&D hVSEN5A"0?`RCwDCDkC|D??E&D hVSEN6A"0?BBzDRCzD CzD??HBH4MD ARD OD??4TD AYD WD??BDDD\DD@5D??C|*|C^SDaECNVDޕC+UD??Current Limit Courier NewSF5SBF5ASB{*H|CdDIWCEhDCxfD?? Over Current Courier NewOCF5OCBF5AOCB|BxC]bwD?CzDهC*/yD??Restart Delay Courier NewSF5SBF5ASB\ DuDDDDzD??4"D hSRFF3PNMCwD DD@D|D??/D hAND5MCpDCzDCuD?1D hNOT5B DpD DwD DsD??pApMC|DCDCD??1D hNOT6BCpD DpD@DpD??ABCpDCpDCpD?? ALCkDCuDCpD??0D hOR3BCrDCrDCrD??@B CrDCDC D??\\BN"DWD/DaD(D\D??&D hCOMP8`DTD"D^D@DYD??E&D hVSEN7A"0?` D^D%DkD"DdD??&D hVDC10@zL &D+bDf(DfD'DdD??5 Courier NewF5F5F5@F5A5@M /DpD;DzD@5DuD??/D hAND6B"/D\D/DrD/D@gD??44BL$@DrDMD|DFDwD??0D hOR4B%;DuD@DuD>DuD?? A B&>DzD@DzD@?DzD??@B)>DzD>DD>DD?? B\.MDuDYDD@SDzD??4"D hSRFF4PNL0YDTDaDYD@]DWD??GD hON3h1aDRDhD^DdD@XD.D hSS3`-_2cDaDhDmDfD@gD??`%D hIDC2Mb0?}\DhshDeDlDr`D=|jD??250u Courier NewF5F5F5AF5A@5A2g6kDaDpDmDmD@gD?? -D hD7`-_=cD@DhDMDfDFD??`%D hIDC3?̔>{_]DtDDkaDHD_D}FD??9u Courier NewF5F5F5AF5A@5A=BIuDJDuDMDuDKD??@BXDkDDwDD@qD??ABYDwDDwD@DwD??@4cD AD @D?? Ne\C@DC@DuCD??&D hCOMP9qf4CD\CDHCD??'7D hSUM2*?L}^NCY_DQnC/hD^CcD??-0.8 Courier NewF5F5F5AF5AH5AfLBiHCDHCDHC D??@`nCDHCD/CD??E&D hVSEN8A"0?axCDCDCD??Q'D hVVCVS3A"0ffffff@|…CDCkDACD??5.1 Courier NewOCF5OCAF5AOCAxA"0B|CDCDC D??@BCDCDCD?? ANDD DDDD??2D hNAND1`CDCDCD??E&D hVSEN9A"0?OD@DD@D@DD??&D hCOMP10BD@DD@DD@D?? AxV D2DNDyDoDD?? Vref GOOD Courier New{F5{BF5A{Bs/CcPDC/DObC6D??UVLO Courier NewF5F5F5AF5A@5ABD@DDDDD?? AB>DD>DD>DD??AB;DC;DD;DD??ppABHDCJDC@IDC??@B\DC\DC\DC?? AB\DC^DC@]DC??@B\DC^DC@]DC??@BWDCYDC@XDC??@BYDC^DC\DC?? ANCDCDC@D??JD hCTOP1g]kD@DpDMDmDFD?? -D hD9`-BkBODCODCOD??CCCBr DD>DD/DD??ppBBvCD>DDDD??**CaHBCBCBC??Q'D hVVCVS4A"0@zМBqCvBqߚC#B5C??3 Courier New_j__j@_@_j@A"0aC\C4CC%CpC?Q'D hVVCVS5A"0@z40ChhC7CwC4CpC??4 Courier Newrr@@s@A"0arD@DzDJD@vDED?Q'D hVVCVS6A"0@zcxD+wCDk{DՈGDzDED??6 Courier NewF5F5F5@F5A5@A"0BzDHDzDMDzDJD?? ABuDMDzDMDwDMD?? ABHBCHBCHBC??@B CC4CC*CC?? ABC DC DC D?? ABpC6DpC9DpC7D??@B\CD\CD\CD??ABHCD\CDRCD?? A_ BDpBDHBD??`%D hIDC4-C6?}h@DBD A D??100u Courier NewF5F5F5AF5AF5AhBDBDBD?? .D hD12`-B HBDBDBD??pApB$BDBDB`D??@aABD CDBD??S'D hIVCCS1A"0S㥛?| C&DC.D C*D??27m Courier NewOCF5OCAF5AOCAAA"0B[CDDDCD??ABqCDDDCD??CBC;DCODCED?? BBDwD/DwD#DwD??44BBD|DMD|D1D|D??BB  CDCDfCD??B`CDD@DCD??&D hVDC13@z]CyD7DOɓDfCĒD??4 Courier NewF5F5F5@F5A`5@`CD4C@DCD??&D hVDC12ffffff"@|CjD4'C@ǏDCŽD??9.2 Courier NewOCF5OCAF5AOCA_zCDCDCD??%D hVDC9?|"CsD+CIDYCބD??0.2 Courier NewOCF5OCAF5AOCABBODBzDBdD??BB%C@DCDCD??44BB)BC CCBC??ppAB+BC CCBC??ppAO-C DCDC D??D hGroundO0fCmDzCrDpCpD??D hGroundO1fCDzCDpCD??D hGroundO2BDC@DBD??D hGroundO3CDC@DCD??D hGround`4HCBzCCaCC??E&D hVSEN2A"0?O5\C CpC CfCC??D hGroundB>CCCCCC?? BO?CCCCCC??D hGround`CzC\DCaDC^D??&D hVDC15?zIюC_D|CkcDڐCaD??1 Courier NewF5F5F5@F5A@5@CBGC\DD\DC\D??BOHfC\DzCaDpC^D??D hGroundOK DkD%DpD"DmD??D hGround`MCCCCCC??&D hVDC16?zO1CþCECCCp:CiC??1 Courier NewF5F5F5@F5A@5@MONCCCCCC??D hGroundBP\DC\DD\D@D??ppAOQYDD^DD\DD??D hGroundBRCCCCCC?? BBTfCYDCYDCYD?? BBlHBCBCpBC?? ABpBCBCBC?? BBCCCCCC??ABCCCCCC??@BCCCCCC??@BCCCCCC??ABCCCCCC??ABC CCCCC??99CBBBB CB C??ABB\C C\CC\C??ABC>CCCCC??BBCCCCCC??@BCCCCCC??44BBCCDC@DC??BBDCJDC4DC??BBJDCJDCJDC??BBDCDCDC??BBC CC CC C??BBzCCCCCC??ABBCBCBC?? ABpCDpC*DpC"D??ABCDCDC@D??ABC*DpC*D9C*D??\\BBC;DC;DC;D??BBpCDCDCD??BBDDDDDD?? AB'D D'DD'DD?? A BD D'D D"D D??ABfDMDfDODfD@ND??@BfDaDmDaDiDaD??ppABfDmDmDmDiDmD??ppAB YDWDYDwDYD@gD??BB fDMDmDMDiDMD??ppABfD@DmD@DiD@D??pApBCCCC CC?? AB4CCCCCC?? CB$ DkDDkDDkD??AB& DDDDDD??AB'DODDWDD@SD??pApB(CODDOD DOD??HHBB+C@DCDCD??@B,CDCDCD?? AB-CDC@DCD?? AB5BDBDBD??AB8B@DBDBD??BB9HBDBDBD??ppAB:BDBDBD??AB;BDBDBD??ppAB>CDCDC@D??AB?HCDCDkCD?? BBACDCDCD??ABDC@DC@DC@D??ABJ ACBCpBC??HHBBM A@DB@D4B@D?? BBS AODBODpBOD??HHBBU AWD4CWDBWD??BB^ A'DB'D4B'D?? BB` A,DB,D4B,D?? BBb ADpCDBD??BBd ADHCDBD??BBe ADBD4BD?? BBffD;DuD;DmD;D??ABjfDODfDRDfDPD??@BkfD^DfDaDfD_D??@BnfD;DfD@DfD>D?? ABpuD;DuD@DuD>D?? ABqCDDDCD??ABt ABABAB?? AByABBBBB?? BB{BBHCBCB??44BB~BRCB\CBWC??@BBCBCBC??@BBC CCBC??ppABBC CCBC??pApBBCBCBC??@BB\CBCBC??HHBB C>CC>CC>C??CBBDCD\CD?? CBCmDCmDCmD?? BBfCkDCkDCkD?? BBCDCDCD??\\BBC|DC|DC|D??ABC@DCCDCAD??@BpCCDCCDzCCD?? A BpCEDCEDzCED?? AB CC4CC*CC?? AB4CzC4CC4CC??@8CCDCHDCED??GND8 CDHCD4CD??GND8CDC"DC D??GND8 CYD4C^D C\D??GND8 DYDD^DD\D??GNDB CC CC CC??pApBBC CCCC??AB CCRCC9CC??A8 CC4CC CC??GND8*CCRCC>CC??GND8 ACHBCAC??GND84CC\CCHCC??GND8A*CB>CHB4C??GND8 CCHCC4C C??GND8BDCDCD??GND8CDCDCD??GND8*C|DRCD>CD??GND8 CD4CD C@D??GND8CDCDCD??GND8mDkDwDpDrDmD??GND8zDJDDODDMD??GND9CDCDC@D??UVLO9 ACHBCAC??UVLO94C\C\CpCHCfC??UVLO9zD@DDEDDCD??UVLOBB@DC@DB@D?? BBC@DCDCD??ABDODfDOD>DOD?? ClACBC\BC??2D hR11R-C6?`-B ACACAC?? ABBCBCBC??@BACACAC?? ABACBCpBC??A4D@DDD@DD??BD D>D D,D D??BB>D D>DzD>DMD??44CBDDD DDD??ABDDDDDD??ABJDCJDDJD D??HHBB DD DkD DAD??%%CBkDCuDCpDC??ABrDCuDCsDC??@BrDCuDCsDC??@B>D DrD D@XD D??BBpDCuDCrDC?? ABkDCmDC@lDC??@BpDCpDCpDC??ABpDCuDCrDC?? ABrDCrDCrDC??ABmDCmDCmDC?? B B mDCuDC@qDC??ppAB YDCYDCYDC??AB YDCpDCdDC??44B4 DDD@D@DD??4DDDD@DD??BCDDD2DD??CBrDCrD DrDD??Bt4D@DwD??Note: Courier New¢F5¢AF5A¢Ap fDʗC<D\MCD??<- All functions of the IC are modelled, including the UVLO, Courier New8pF58pCF5A8pCn5D̞CۇDBCD??:- This model applies to UC1825A (Ta = -50 oC to +125 oC), Courier NewgF5gCF5AgCPX4NDVCTDLNCQD??9current limiting, leading-edge blanking, and soft start. Courier New:cF5:cCF5A:cC<|"DZfCi(D<{C%D??DUC2825A (Ta = -40 oC to +85 oC), and UC3825A (Ta = 0 oC to +70 oC). Courier NewOF5OCF5AOCJ;DϯDD=D ^DnD??J or N Package; DW Package Courier New>{>C{A>CuEDDTTDD LDD??1: INV Courier New#{#A{A#At ED@DfQD웷DKDmD??2: NI Courier New=s{=sA{A@sAw!EDDrEYDDbODD?? 3: EAOUT Courier New"{"B{A"By"ED@D6^D웼DgQDmD?? 4: CLK/LEB Courier New=sK{=sKB{A@sKBt#EDDfQDDKDD??5: RT Courier New=s{=sA{A@sAt$ED@DfQDDKDmD??6: CT Courier New=s{=sA{A@sAv%EDDVDDb&NDD??7: RAMP Courier NewDj{DjB{A@jBt&ED@DfQDDKDmD??8: SS Courier New=s{=sA{A@sAv'hD@DyDDb&qDmD??9: ILIM Courier NewBABv(fDDLwDDbnDD??10: GND Courier NewBABw)fD@DryDDoDmD?? 11: OUTA Courier New((BA(Bw*fDDryDDoDD?? 12: PGND Courier New"{"B{A"Bu+fD@DtD웼D jmDmD??13: VC Courier New#{#A{A#Aw,fDDryDDoDD?? 14: OUTB Courier New"{"B{A"B-J;D_wDDD ^DD??DIL-16, SOIC-16 (TOP VIEW) Courier New>{>C{A>Cv.fD@DLwD웷DbnDmD??15: VCC Courier NewDj{DjB{A@jBw/fDDryDDoDD?? 16: VREF Courier New"{"B{A"B1CpB3DҞB]ZDkiB??PSIM Model for UC3825A Courier New!B!ABt2B%DC/DB*D??:D hOP_AMP2P@P84B,DC1DC/D??GND~:pB D/-C $D/Bn"D??Error Amplifier Courier New#tF5#tBF5A#tB;ׁDuCEDGlCD??D- A gounded op. amp. (OP_AMP) can be used for the error amplifier Courier NewOF5OCF5AOC<?CD{DIDCeFD??Eif the IC reference ground is connected to the power circuit ground. Courier NewXF5XCF5AXC=#D C DaCD??B- The propagation delay is not modelled. It can be included by Courier New>F5>CF5A>C>0bDCjD^SC~fD??:adding time delay blocks (TDELAY) at the gating output. Courier NewgF5gCF5AgCB?DC@DCDC?? AB@DC@DCDC?? A   .END