LED電源解決方案.doc

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1、編者按：Fairchild公司的大功率LED鎮(zhèn)流器采用諧振半橋轉(zhuǎn)換器FSFR2100和PFC控制器FAN7529,通用輸入電壓90-265Vrms,總輸出功率200W,提供六個恒流直流輸出,每個容量為0.7A/48V.也可改變?yōu)?.35A/96V.本文首先介紹了FAN7529和FSFR2100的主要特性,方框圖,典型應(yīng)用電路.接著介紹了200WLED鎮(zhèn)流器電源解決方案的詳細電路圖和所用材料清單(BOM).照明工程師社區(qū)CW}2?+rr6hVq6`照明工程師社區(qū)_Da5pL2aZTh

2、eFAN7529isanactivepowerfactorcorrection(PFC)controllerforboostPFCapplicationsthatoperatesincriticalconductionmode(CRM).Itusesthevoltagemode'w1auNE@8FPWMthatcomparesaninternalrampsignalwiththeerroramplifieroutputtogenerateMOSFETturn-offsignal.照明工程師社區(qū)

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4、DzDqBecausethevoltage-modeCRMPFCcontrollerdoesnotneedrectifiedAClinevoltageinformation,itsavesthepowerlossoftheinputvoltagesensingnetworknecessaryforthecurrent-modeCRMPFCcontroller.~Cf2p8[i@/{@AH]&d~:aFAN7529providesmanyprotectionfu

5、nctions,suchasover-voltageprotection,open-feedbackprotection,overcurrentprotection,andunder-voltagelockoutprotection.照明工程師社區(qū)$I$

6、-N`W0hk(kQa@(Tp{3^?!Z^.AvyTheFAN7529canbedisablediftheINVpinvoltageislowerthan0.45Vandtheoperatingcurrentdecreasest

7、o65μA.Usinganewvariableon-timecontrolmethod,THDislowerthantheconventionalCRMboostPFCICs.,N&xQ
m,]照明工程師社區(qū),n:@/sN-]FAN7529主要特性:照明工程師社區(qū)/@j+ie#BLowTotalHarmonicDistortion(THD)照明工程師社區(qū)'x;V(wu)F7_UU)WPreciseAdjustableOutputOver-VoltageProtection;k3n)I_

8、5x~Open-FeedbackProtectionandDisableFunction照明工程師社區(qū)-Q_ZC.I8K4viZeroCurrentDetector照明工程師社區(qū)ZAsG.kw"M150μsInternalStart-upTimer_E;p5o*GxMOSFETOver-CurrentProtection照明工程師社區(qū)+mV&u%bEZuUnder-VoltageLockoutwith3.5VHysteresis照明工程師社區(qū)1e#KG0a'GB!}?:

9、qe/jLowStart-up(40μA)andOperatingCurrent(1.5mA)#y[7F&S1T/GS^.v8cTotemPoleOutputwithHighStateClampI'hT/WSS9VJ2b`t+500/-800mAPeakGateDriveCurrent6v'`$w"[2J8-PinDIPor8-PinSOP照明工程師社區(qū)!_bd/MZg0_~sy.n6k"Ke"VhFAN7529應(yīng)用:$xUA`;DZ`Adapter8bV'k

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11、/yv:VBallast照明工程師社區(qū)HG0y+R!Or,d8c,RLCDTV,CRTTVeMdq.DwySMPS照明工程師社區(qū)
}jcF'e;G#S5_7S+[IS照明工程師社區(qū)mFe+Dy(?:g"J圖1.AN7529功能方框圖照明工程師社區(qū){mh0zK@照明工程師社區(qū)$?(

12、
[7I2f}Yj照明工程師社區(qū)R^HK,~M"a;G_NX!D圖2.FAN7529典型BoostPFC應(yīng)用照明工程師社區(qū)e$b"m[