四开关Buck-Boost变换器原理图

1、112233445566DDCCBBAATitle NumberRevisionSize BDate:2011-4-12Sheet of File:SSC251uF/10VGND_PR2046.4KR2310KR19100KC13100p R22100K /N T C /0603OT+5VVIND4R1810K ON/OFF GND_PSync_CON1R1710K C11100p1526U9ANC7WZU04C321uF/16V/0603VCCR43681R/0603D10BAS16XV2T1R42681R/0603D9BAS16XV2T1C28220pFGND_PC27220pFGND_P

2、LI1Phase1GND_PL2SR0302,10uHC10 0.1uFC81u/10V/0603BYP 4GND2ON/OFF3VIN 1VOUT 5U3TPS76050DBVRC91uF/16V/0603+5VVCC GND_PD 1B A S 16X V 2T 1Z 1M M 3Z 13V T 1GND_PVINR1640.2K VIN VOUT1C1C2LO1HO1LO2HO2Phase1Phase234U9BNC7WZU04C341uF/16V/0603R45825RD12BAS16XV2T1R44825RD11BAS16XV2T1C30220p FGND_P C29220pFGND

3、_PHO2Phase2CCP_Dmax CCP_Dmin GND_PD 2D F L S 1100D 3D F L S 1100C7A Phase1R21100K R1540.2KC191u/10V C2133nC20100pF R301KGND_PVOUT1R3440.2KR3510K/0.5%R3110KC60330pF Buck _FB 1526U13ANC7WZU0432184U1ALM2903R1210KR131KR31K 567U1BLM2903VIN R51MR10442K+5VGND_PGND_PR111K R71K C510nFC310nFCON2+5VCON1C61uF/1

4、0VR92.05K32184U12A spareQ6SI1022R5110KC3822nFVOUT1OVVrefR62.05kR42.05KR290.9K R1105KR3286.6KR3395.3K/0.5%GND_PGND_P R50100KR53105KGND_P+5V C371uF/10V OVP LOCK(53.75V changeC1_A C1_B2.2u F /100V /1210C2_F C2_G C2_HC2_DC311uF/16V/0603GND_PC331uF/16V/0603GND_PVCCVrefR491KUVUV B11GND 2B03A4VCC5S6U7FSA31

5、57GND_PB11GND 2B03A4VCC 5S6U8FSA3157C261uF/10VGND_PR472.05K R1410/0603+5V GND_PINAINA INB INB VDD 1HB 2HO 3HS 4NC5NC 6HI 7LI 8VSS 9LO 10U10LM5101VDD 1HB 2HO 3HS 4NC5NC 6HI 7LI 8VSS 9LO 10U11LM5101HO1GND_PLO1HI1LI1HI1GND_PLO2LI2HI2LI2HI2GND_PBuck _D Boost_D M C L R1R C 52R C 43O P 1/C 1I N -4A N 85A

6、N 96R B 77R B 68O P 2+9O P 2-10O P 2/C 2I N -11P H 112A N 115C 1I N +16V S S17V D D18R A 519A N 320C 2I N +13A N 214U4PIC16F785C1522nFC16100pFR252.05KRB6VOUT1R2910K/0.5%R2610K C17330pF R2786.6KR2895.3K /0.5%GND_P CCP_DmaxCCP_DmaxBoost_Saw Boost_D +Buck _SawBoost_FBBuck _FBR482.05KBoost_FBSawtooth ge

7、nerator+5VCON1VCCDriverDriving logic12345U5PIC PROGRAM PADS+5V CLK DATA GND_PMain circuit C180.1uFGND_PGND_PC391uF/10VC401uF/10VGND_P Buck cell multiplexerBoost cell multiplexerMode Buck Buck _Boost Boost CON1CON2CON3100001010R523mRCS1U14OPA365R5451.1KR691kR551KR5651.1K C411uF/10VC42100pF GND_P GND_

8、PCS1GND_PCS567U12Bspare R57511OCC43100pFGND_P R5910K/0.5%/0603R604.02K/0.5%GND_P+5VQ1IRF6644Q4IRF6648Q2IRF6644L110uQ3IRF6648Q5BCX5616/SOT89R614.02k C7BCL21B222KCNB Phase2R65100kCCP_Dmin+5VR3686.6kGND_PC22150p+100pQ7N T A 7002N T 1GSync VIN+5VC571000p+470p+150pQ8N T A 7002N T 1GR66R67R6810K CCP_Dmax

9、Boost_D Buck _D GND_PQ13SI1022+5V +5V D 5B A T 54X V 2T 1R9451.1kR934.02k +5VRB6CLR CLRR7110K +5VON/OFF1Sync_CON2NSyncBuck _pwm Sync Buck _DCON2SSSync_CON3R721K +5V D14Buck _COMBoost_COM Buck _pwm121314U17D MCP6004D20B A T 54X V 2T 1C511u/10V GND_P GND_P+5V R74187kR7314.7k R75187kVINBoost_saw_k VIN

10、321411U17AMCP6004D21B A T 54X V 2T 1R7740.2KR7610KR789.09kB 1E2C 3Q17MMBT4403+5VGND_PC53100pQ18N T A 7002N T 1GR79511Boost_saw_k VIN R8020.5kCSSyncVIN+1ON/OFF3VIN-5VOUT-6VOUT+7J01/4 BRICK2VINGND_PON/OFFVOUT1CLK DATAR4151.1kBoost_saw0CS +5VC47470p+68pGND_PR706.19kQ23N T A 7002N T 1GSyncB11GND 2B03A4V

11、CC 5S6U18FSA3157C521u F /10VGND_PBoost_Saw+5V Sync_CON21098U17CMCP6004Vref1Buck _COM567U17B MCP6004Vref2GND_P+Buck _saw Q20SI1022Z3MM3Z3V9T1+5VGND_P Q21SI1021FaultC581uF/10V GND_P GND_PA21B22Y27G 4V8U20BNC7WZ02+5V Sync_CON3C591uF/10V GND_PSync_CON1Sync_CON2Sync_CON1A15B16Y13U20A NC7WZ02Sync_CON1Sync_NCON1Sync_NCON1Sync_CON3Sync_CON3Sync_NCON1Sync_CON2+5VR90R9182.5k +1.78k D1934U13BNC7WZU04SyncNSyncU21