n"*44BB* p@pAA B4Bp4BH4B 4B4B4B 4B4B A4BA4BA4B B4BHB4BpB BBABpAB@BBpBB B4pB4HB4 B4A4A4 A44 444 4H4pGNDPGNDCOUTENBLVCCREFZDCTINVSSCOMPVCAOUTBOUT'%C:\psimwork\PWM-IC\Uc3872\UC3872.sch  DDCr?V.TIMEh㈵>{Gz?GroundR DIODESSWIVDC&COMP(SUM2P/ANDGATE0ORGATE1NOTGATE2 NANDGATE4SRFF5JKFFEVSENGONCTRL`IDC OP_AMP_1M%D\C1DC@+DpC??/D hAND1_fCCzCCpCC??%D hVDC1?|j JClC`CfYCqUCbC??1.5 Courier NewU1UU1AU@P1A_C@DCMDCFD??%D hVDC2?|v`CDD yC7HDCFD??0.5 Courier NewU1UU1AU@`1A_ DCDC DC??%D hVDC3?|̆D7CDCL DC??0.1 Courier NewU1UU1AU@@1A _ C*DC/DC,D??%D hVDC4@z{)Cw,DC0D$C.D??3 Courier NewlUl@U@l@ _ CCDCCC??%D hVDC5 @|oD*CDCDm C??3.7 Courier NewU1UU1AU@@1A NDCDC@DC??&D hCOMP1NDzCDC DC??&D hCOMP2NDCDC DC??&D hCOMP3LDCDC@DC??0D hOR1B DCDCDC??@B(fCCpCCkCC??@4/C6D>C;D*C9D??40CD>CD*CD??41CC>CC*CC??!42CC>CC*CC??43CC>CC*CC??#44C C>C4C*C*C??45cDCmDChDC?'46cDCmDChDC?)47cDCmDChDC? 48CHD>CMD*CJD??N@C9DCCDC>D?&D hCOMP4NEC/DC9DC4D??&D hCOMP5MHC4DC>DC9D??/D hAND2BIC4DC6DC@5D??@BJC;DC>DCD>D7D??`%D hIDC1Mbp?{-6D5DF:D.9Dm8D7D??4m Courier NewU@U@@gghCD1DHD>DED7D?? -D hD1`-Lo1D*D9D/D@5D,D??GD hON1Bw>DD>D%D>DD??ABzD,DD,D@D,D??@B|D'DD'D D'D??ABCDC/DC#D??44B_CDCDC D??%D hVDC6@|/4mC D}C_ DLxC( D??4.5 Courier NewU1UU1AU@X1A_C DCDC@D??`%D hIDC2-C6*?}fCDCDECD??0.2m Courier NewlUlAU@ lA_CCCDCC?`%D hIDC3h㈵>|RCohCkC*DޠCn/D??20u Courier NewU1UU1AU@`1A_C BCBCB??%D hVDC7?zCLdBCّBHCB??1 Courier NewlUl@U@l@`CCCCCC??E&D hVSEN2A"0?NCC DCDC?&D hCOMP8NCC DDDC?&D hCOMP9BCCCCCC??@BCCCCCC??ABCCCCCC??@L DCDC@DC??0D hOR3B DC DC DC??@B DC DC DC??@_CDCDC@ D??%D hVDC8?|sBCm D=DDHC D??0.2 Courier NewU1UU1AU@P1A`CpCCCCC??E&D hVSEN4A"0?N*DC6DC@0DC??5D hJKFF1B'DC*DC(DC??@B'DC'DC'DC?? A B'DC*DC(DC??@B'DC'DC'DC??pApM'DD1D D,DD??1D hNOT1M'DC1DC,DC??1D hNOT2M1DD>DD7D D??/D hAND3M1DC>DD7DC??/D hAND4B%DC%DC%DC??\\BB%DC*DC'DC?? AB%DC'DC@&DC??@BDCDDDC??AM TDCaDCZDC??/D hAND5M TDCaDCZDC??/D hAND6B 6DC6DC6DC??@B6DC6DC6DC??@BODCTDCRDC?? ABODCTDCRDC?? ABODpCODCODC??BBODCODCODC??AB6DCTDCEDC??ppBB6DCTDCEDC??ppBB#aDCcDC@bDC??@B$aDCcDC@bDC??@B(aDCcDC@bDC??@4)CB>CB*CB??BC9DD9DC9D??ABDCDCDC?? ABDD1DD'DD?? BB6C;DC;DC;D??ArvCCCDC@D??(8D hSUMP1a?a?BODCODCODC??ABODCTDCRDC?? A`CCCCCC??E&D hVSEN6A"0?`C CCHCC4C??E&D hVSEN7A"0?_$CCCCCC??`%D hIDC4Mb@?g%CCCCCC?? -D hD4`-_>CCCCCC??%D hVDC9333333?}͞CC CmvCq3CC??0.15 Courier NewlUlAU@ lA>B@CCCCCC??@BACCCCCC??@\B@DCMD DFDD??4"D hSRFF3PN\CD%D D/DD*D?4"D hSRFF4PNOIC*CDRCC>C??&D hCOMP10BNC4CC4CC4C??A`QpCBC CzCB??&D hVDC10@zfsCK&B?CBͅCB??3 Courier NewlUl@U@l@QOnCCCCCC??D hGroundOrCDCDCD??D hGround`tC6DC@DC;D??E&D hVSEN5A"0?OuCMDCRDCOD??D hGroundOzC*DC/DC,D??D hGroundOCCDCDC??D hGround`CDC DCD??&D hVDC12?|:CDC#DmC!D??0.1 Courier NewU1UU1AU@`1AOCDC DCD??D hGroundOCBCBCB??D hGroundBzCBzCBzCB??@BD>C%D>CD>C??BBDCDCDC?? ABDC%DC@!DC??ppAB%DzC%DC%DC??ABDC"DC DC?? ABCCCCCC?? ABCCCCCC??BBCCDCCC?? BBCCCCCC??ABfCzCfCCfCC??\\BBCCCCCC??@BCCCCCC??ppABCCCCCC??ABCCCCCC??ABCCCCCC??ABCCCCCC??@BCD>DDDD??ffCB D,D%D,D"D,D?? AB CDCDCD??ppAB!CDC DC@D??ppAB%D DD D@D D??@B'D*DD*D@D*D??@B*CDCDCD??HHBB/CCCDCD??@B1CDCDCD?? AB3C1DC1DC1D??ppAB5CDC%DCD??BB6C%DC1DC@+D??AB7C%DC%DC%D??\\BB8>D1DED1DAD1D??ppAB=>D>D>D@D>D@?D??@B?%D,D1D,D@+D,D??ABA"DD'DD%DD?? ABB%D D1D D@+D D??ABFMDDODD@NDD??@BIODCTDCRDC?? ABK>D D@D D@?D D??@BL@DD@D D@D@D??@BN%D D%D,D%D@D??BBP"DC"DD"DC??BBQ>DC@DC@?DC??@BR@DC@DD@DD??@BTODCODDODD??ABUCCDCDC?? BBV>D>DED>DAD>D??ppABW%DC%D D%DD??AB[>CCCCuCC??\\BB]>CDCDkCD??44BB_>C9DC9DkC9D??44BB`C>DC>DC>D??@BaC>DCJDC@DD??ABb>CJDCJDfCJD?? B BcC4DC>DC9D??ABdC4DC4DC4D??@Be>CBzCB\CB??A8gRCCzCCfC C??GND8hC4CCHCC>C??GND8iCCCCCC??GND8jHCCpCC\CC??GND8kCCCCCC??GND8lCCCCCC??GND8mfCDCDzCD??GND8n4D>D>DCD9D@D??GND8oCHDCMDCJD??GND7pCACHBC B??1V7rC>CCRCCHC??1V7sCCDCCC??1V7tDC'DC"DC??1V7uC4DC9DC6D??1VvC[DC`DCz^D??DIL-14 (TOP VIEW) N Package: Courier New*C*ACvwD CbDwPCgD8.CSMeD??1: BOUT Courier New*B*ABvxD CfjDwPC3oD8.CSlD??2: AOUT Courier New*B*ABtyCwpD?CCuD'CYsD??3: VC Courier NewV*VA*AVAvzD CvDwPC{D8.CSMyD??4: COMP Courier New*B*ABt{<C8|D<>CpD<&Cz~D??5: SS Courier NewV*VA*AVAu|D C9D8FC!Dk*ClD??6: INV Courier NewU*UA*AXAt}D Cv3DD=CܙDD%CfD??7: CT Courier NewV*VA*AVAt~D{Cv3DOCܙDOCfD??8: ZD Courier NewV*VA*AVAuD{C9DoC!DClD??9: REF Courier NewU*UA*ATAvC%DfC%DRC??A4C>CA*C A??8RCHBzCBfCpB??GNDlpC ACpBzC B??2D hR32RcA`-B>C AzC A\C A??A`HC*C\C\CRCCC?&D hVDC13@z#rbC%;CiCJC$fCCC??2 Courier NewlUl@U@l@B>C*CRC*CHC*C?? ABRC*CC*CC*C??B8*CRCRCfC>C\C??GNDB>CCfCCRCC??AB>CCCCCC??BB1DpCODpC@DpC??ppBNTDCaDCZDC??2D hNAND3tz.DZDzmD^D DH\D??Note: Courier NewUAU@A\DhkDjDnDq9DmD??6- The under-voltage lockout function is not modelled. Courier NewSDUSDCU@TDC]D}\qDEDRuDt|'DWsD??"- Pin VC and PGND are not used. Courier NewUBU@BD?CDRAb%DA'@??PSIM Model for UC3872 Courier New1 9)1 B9)A0 BO D`DpD.dD=DbD??9- This model applies to UC1872 (Ta = -55 oC to +125 oC), Courier NewOUOCU@OC+ DioeDfDeiDQEIDjgD??BUC2872 (Ta = -40 oC to +85 oC), and UC3872 (Ta = 0 oC to +70 oC). Courier NewepUepCU@epCtpCCCCCC??:D hOP_AMP1P @PBpCCCCCC??ppABCCCCCC??A~*4CMCIC'CkCC??Error Amplifier Courier New]U]BU@]BBCCDCCC??44BBfCzCCzCCzC??BBCCCCCC??ppABCCCCCC?? ABCCCCCC??44BnvDwDUD8{DGDyD??D- A gounded op. amp. (OP_AMP) can be used for the error amplifier Courier NewwUwCU@wCnD|DߗDDDJD~D??Eif the IC reference ground is connected to the power circuit ground. Courier NewN~{UN~{CU@P~{C   .END