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l(f)ڣ[2009-3-17]    [3215]ΡЇ늚ЈُW(wng)[EM39.com]{(bio)pԄӝL}
      Һҕ(LCD TV)ЈϵĝB͸ʿЈоA(y)Ӌ2009ҺҕĿwЈռʌ_(d)50%SĻߴ粻ͻƣҺҕĹҲˮq^ߵĹĕֱMߵM_֧c(ji)ܭh(hun)څ౳xҎ(gu)C(j)(gu)_ᘌҕЧҎ(gu)h(hun)(EPA)l(f)ġԴ֮ǡ3.0ҕҎ(gu)2008111_ʼЧ
LIPSQȡy(tng)ҺҕԴ


˽^ߴҺҕʹϸNЧҎ(gu)ϵy(tng)ɱpСQߴʹҺҕMߚgӭҺҕԴ҂Բȡͨ^N;

´ڞg[DƬ
D1Ø(bio)(zhn)ֱ24 V׃Ăy(tng)Һҕ_P(gun)ԴD

y(tng)ҺҕԴҪ-ֱ(AC-DC)D(zhun)Qֱ-ֱ(DC-DC)D(zhun)Q߉׃@ׂ֡AC-DCDC-DCλͬһK·׃骚·壬ͨcҺһṩУAC-DCԴ110 Vac/220 Vac늉(jng)^(sh)У(PFC)͞VD(zhun)Q200 V/400 Vֱ߉ڂy(tng)׃ݔ늉Ҫ24 VPFCݔ늉200 V/400 V늉횽(jng)^D(zhun)Qa(chn)·ݔ늉һ·24 V늉ṩo׃ٽ(jng)^ֱ-(DC-AC)D(zhun)Q鳬^1,000 V_(d)2,000 Vĸ߉ȥ(q)ҺCCFL@N(bio)(zhn)24 V׃Һҕ_P(gun)ԴĹܿDD1ʾ

ĿǰЈϵҺҕԴ@Ny(tng)ԴȻռ(sh)ֵһڸNߴҺҕ̖26Ӣ؄e32Ӣ缰ߴҺҕЈռ(j)(do)λᘌ26Ӣ缰ϳߴҺҕӿF(xin)һNµ׃߉Һ@ʾԴ(LCD Integrated Power SupplysLIPS)c׃λڪ·Ăy(tng)Դͬ@NLIPSQAC-DCDC-DC׃Y(ji)ͬһK·
ڽ(jng)^M(jn)PFC͞V@200 V/400 Vֱ늉ֱӲ200 V/400 V늉׃ݔͨ^DC-ACD(zhun)QҺij^1,000 V_(d)2,000 Vĸ߉@Ӿ24 VD(zhun)QΣpȽ24 VٴԴһǧ߉^дڵĴʓpĶϵy(tng)ЧpٵױPl(f)Ϳɱ

´ڞg[DƬ
D2ɭ댧(do)wᘌ32ӢҺҕȫ߉LIPSQܿD

@ɭ댧(do)wcMicrosemi˾Y(ji)pLṩm϶Nʵȼĸ߉LIPS׽QĿǰѺ_l(f)ᘌ32ӢҺҕLIPSQ(D2־ʾ)ϵy(tng)Դ@Q˰ɭ댧(do)wNCP1606 PFCԼ䮔(dng)o_P(gun)ԴNCP1351 PWMLIPS׃Microsemiʹܛ_P(gun)g(sh)LX6503ȫ(q)ڹ̶lM(jn)늉_P(gun)(ZVS)cܘ(gu)@Nȫ׃Q@(yu)p늴Ÿɔ_(EMI)͹ʓpͬrƱ(q)ϟoʹ~ĹʶO@ȫY(ji)(gu)õ4MOSFET׃еҎ(gu)ǰY(ji)(gu)һ܉ͨ^x׃ֱ(q)ӹMOSFETڌF(xin)^o(h)(OCP)ȡ

˸Ñ(yng)ЈߴLIPSҺҕɭ댧(do)w_l(f)һLIPSҺҕO(sh)ӋӋ2009Ƴ46/47Ӣ煢O(sh)ӋLIPS׃c32Ӣ緽ͬȫ׃ͱLX6503ݔʴ(q)ӸCCFLϵy(tng)ԴԸ(j)wO(sh)ӋҪ`xɭ댧(do)wĽQNCP1601NCP1606NCP1631PFCԼNCP1351NCP1379PWM@µĽQÎ^ČôC(j)_P(gun)Դֵ֧150 mWijʹC(j)ܺ@Q·ϵԪ߶ȵ16 mm(ϵy(tng)ȶȵ20 mm)ָ֧wҺҕO(sh)Ӌ

ֵһ/Ї/W˵Ȳͬ^(q)ЈԴҪ󲻱Mͬɭ댧(do)wᘌϲͬ^(q)IJͬԴҪṩ(yng)ԴQּڃ(yu)O(sh)ӋsСϵy(tng)ߴ缰ͳɱ

ᘌݔҕl̖̎Դòͬķ(wn)


ҕl̖̎ݔ늉ͨ+ 5 V+12 Vڷ(wn)÷Ը(j)ݔҪáͨԣ͉(wn)(LDO)^͵ݔһ0.11.5 A֮gLDOƫݔLDOͼɽD(zhun)Qṩ1.5 A5 Aݔڸ棬ԲÎⲿ_P(gun)ͬͬṩ5 Aݔɭ댧(do)wṩһϵеĸLDO(wn)NCP699/633NCP5500/5501NCP3334/3335ANCP5661/5662/5663NCP605/606NCP3520/3521

İl(f)չڅ݁Sҕl̎оƬMļɶԽԽwICҪݔ늉 (3.3 V I/O1.25 V(ni))ʹþԷ(LDO)x·ߴڅСʹ܉oLDOʺɢİgpС(yng)ԲDFNbLDO߹ܶMOSFETLDOԎpСPCBռe

һԴD(zhun)QЧʼִ֧ͮһЩݔҪLDOD(zhun)Q_P(gun)(wn)_P(gun)(wn)Ϳڅø_P(gun)lʣ50 kHz150 kHz350 kHz500 kHz700 k Hzl(f)չĶSpСⲿ늸кݵijߴwewҺҕҞˎpСϵy(tng)ߴ缰ͳɱ_P(gun)(wn)څڼɶ·ݔp·(wn)ijЩ늉ݔϵҪԽԽߣ5 A@ʹ˾иļ_P(gun)(wn)Լ_P(gun)lʸߵķ+Ч(yng)(FET)MϣM(jn)ͬg(sh)đ(yng)

ɭ댧(do)wNCP312xϵp·2 A/2 A3 A_P(gun)(wn)dzmҺҕ̖̎ϵ+5 V+12 Vݔˑ(yng)lʿ200 kHz750 kHz֮g{(dio)(ji)ṩ0.8 V±1%늉֧180°ÑɌԄ׷ۙM(jn)пơ

·fPFCܘ(gu)ֳ֧ҺҕO(sh)Ӌ


֪Һҕĺѽ(jng)^µڅģKֺڅ10 mmwĺȣoԴO(sh)Ӌ̵(zhn)Ҫʹõ͸߶ȵ׃(@Ҫ]x©늵ĸ߉LIPS؄eP(gun)I)(PFCȦ)“(lin)õ͸߶ȵɢƬM(jn)ˮƽbҌֱݵĸ߶ڵ10 mm

´ڞg[DƬ
D3ÃwNCP1601 PFCF(xin)ĽeʽPFCܘ(gu)ĹܿD

PFCðɭ댧(do)wNCP1606NCP1654PFCѽ(jng)ԌҺҕȽ^ֵ֧10 mmĘOwO(sh)ӋԲÃw^СNCP1601оƬýeʽܘ(gu)ԌF(xin)D3ʾ^eʽPFCҪ뷨ԭÆ΂^PFCĵطзÃɂʞһ^СPFC@ɂ^СPFC180°ƽ湤ݔ˻ݔۼӕrÿyҪ֌

˽o͑ṩxɭ댧(do)w߀Ӌ2009ƳµĽeʽPFCNCP1631@һNоƬQ2wNCP1601ԌF(xin)ͬӵĘOO(sh)Ӌ߶m10 mmȵĘOwҺҕO(sh)Ӌ߀U(ku)չʷpy

C(j)ܺڅ100 mW


ҺҕĴC(j)ܺһֵP(gun)עc200811_ʼЧġԴ֮ǡ3.0ҕҎ(gu)ᘌC(j)ܺĵĘ(bio)(zhn)ǵ1 WM@(bio)(zhn)Ǐ(qing)Ҫ󣬵ЈȻкܸߵָ(do)x

ҺҕĴC(j)ܺδ팢M(jn)һС͌΢̎ėlݔʞ50 Wrܺĵ600 mWÌôC(j)_P(gun)Դlܺĵ400 mWÌôC(j)_P(gun)Դ^(ĶڴC(j)r_PFC_P(gun)Դ)rܺĵ200 mWҪʹøӡGɫļg(sh)팢a(chn)ƷߵƷĶM(jn)һM(jn)O(sh)ӋʹôC(j)ܺĵ100 mWܳɞһҪڅ


ҺҕЈl(f)չѴͬrԴĆ}ҲܵĿҪЈÓfһҪ;Dz(yu)ҺҕԴO(sh)ӋO(sh)Ӌʹ֮µЧҎ(gu)ҪҪl(f)չڅLIPSȡy(tng)׃ͨ^(chung)PFCܘ(gu)ֳ֧ҺҕO(sh)Ӌط@Щڅ݌ҺҕԴO(sh)ӋӰY(ji)ϰɭ댧(do)wĮa(chn)ƷͅO(sh)ӋԔ(x)U֧@ЩڅĶ̿s̷ȫͬ(yng)ЈҪĮa(chn)Ʒ_l(f)ӿM(jn)


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