反激变压器设计步骤

१ቍڤ᧢ᚘᕴ๻ૠ଺෻ (Flyback Transformer Design Theory) * ʳᄗ ૪ * ՠʳ܂ʳ଺ʳ෻ * ๻ʳૠʳֱʳऄ * ʳ๻ʳૠʳኔʳࠏ * ՛ ࿨ ઔ࿇ຝݾ๬֭གᓰ Lisc ֲཚ:2009/11/28 รԫᆏ. ᄗ૪. १ቍڤ(Flyback)᠏ངᕴԾጠ໢ጤ֘ᖿڤࢨ"Buck-Boost"᠏ངᕴˁڂࠡᙁנጤڇ଺ᢰ៥ิឰၲሽᄭ ʳழᛧ൓౨ၦਚۖ൓ټˁᠦᒵী१ቍڤ᠏ངᕴ଺෻ቹڕቹ. ԫΕ१ቍڤ᠏ངᕴऱᚌរڶ: 1. ሽሁ១໢ʿ౨೏ய༼ࠎڍሁऴੌᙁנ, ڂڼᔞٽڍิᙁנ૞ޣ. 2. ᠏ངய෷೏ʿჾ؈՛. 3. ᧢ᚘᕴרᑇֺଖለ՛. 4. ᙁԵሽᚘڇৰՕऱᒤ໮փं೯ழʿսױڶለ᡹ࡳऱᙁנʿؾছբױኔ෼ٌੌᙁԵڇ 85~265V ၴˁྤᏁ֊ངۖሒࠩ᡹ࡳᙁנऱ૞ޣ. ԲΕ१ቍڤ᠏ངᕴऱ౒រڶ: 1. ᙁנሽᚘխژڇለՕऱెंʿ૤ሉᓳᖞ壄৫լ೏ʿڂڼᙁנפ෷࠹ࠩૻࠫʿຏൄᚨش࣍150W אՀ. 2. ᠏ང᧢ᚘᕴڇሽੌຑᥛ(CCM)ᑓڤՀՠ܂ழ,ڶለՕऱऴੌ։ၦ,࣐ᖄી጖ज़堷ࡉ,ࢬאؘႊ १ቍڤ᧢ᚘᕴ๻ૠ଺෻ (Flyback Transformer Design Theory) বय़ᕴ䆒䅵䌘ற.xls 1/12 Lisc Oct. 2. ᠏ང᧢ᚘᕴڇሽੌຑᥛ(CCM)ᑓڤՀՠ܂ழ,ڶለՕऱऴੌ։ၦ,࣐ᖄી጖ज़堷ࡉ,ࢬאؘႊ ڇ጖ሁխףԵ௛Ꮌʿൕۖທګ᧢ᚘᕴ᧯ᗨ᧢Օ. 3. ᧢ᚘᕴڶऴੌሽੌګٝʿ׊ٵழᄎՠ܂࣍CCM / DCMࠟጟᑓڤʿਚ᧢ᚘᕴڇ๻ૠழለܺᣄʿ֘ ༚ᓳᖞڻᑇለႉٻڤڍʿ૯זመ࿓ለᵵᠧ. รԲᆏ. ՠ܂଺෻ ڇቹ˄ࢬقሶᠦ֘ቍڤ᠏ངᕴ(The isolated flyback converter)խ, ᧢ᚘᕴ" T "ڶሶᠦፖރੌհᠨૹ ʳ܂شˁڂڼ" T "Ծጠ੡Transformer- choke.ሽሁऱՠ܂଺෻ڕՀ: ᅝၲᣂདྷ᧯ጥ Tr tonழʿ᧢ᚘᕴॣ్Npڶሽੌ Ip,ࠀല౨ၦᚏژ࣍ࠡխ(E = LpIp / 2).ط࣍NpፖNs ʳᲞࢤઌ֘ʿڼழԲᲞጥ˗֘ٻೣᚘۖኲַʿྤ౨ၦႚಬࠩ૤ሉˁᅝၲᣂTr off ழʿطᄛڻࡳ৳ : (e = -NϦӥ˂ϦT)ױवʿ᧢ᚘᕴ଺ᢰ៥ิലขسԫ֘ٻሽႨʿڼழԲᄕጥ˗إٻᖄຏʿ૤ሉڶሽੌIL ʳੌຏˁ१ቍڤ᠏ངᕴհ᡹ኪंݮڕቹ2. طቹױवʿᖄຏழၴ tonऱՕ՛ലެࡳIpΕVceऱ༏ଖ: Vce max = VIN / 1-Dmax VIN: ᙁԵऴੌሽᚘ ; Dmax : ່Օՠ܂ࡌཚ Dmax = ton / T বय़ᕴ䆒䅵䌘ற.xls 1/12 Lisc Oct. طڼױवʿუ૞൓ࠩ܅ऱႃሽᲞሽᚘʿؘႊঅ਍܅ऱDmaxʿՈ༉ਢDmaxІ0.5,ڇኔᎾᚨشխຏൄ࠷ Dmax = 0.4,אૻࠫVcemax Љ 2.2VIN. ၲᣂጥTr onழऱႃሽᲞՠ܂ሽੌIe,Ո༉ਢ଺ᢰ୽ଖሽੌIp੡: Ic = Ip = IL / n. ڂIL = Io,ਚᅝIoԫ ࡳழʿרֺ nऱՕ՛ܛެࡳԱIcऱՕ՛ʿՂڤਢਊפ෷ښਁ଺ঞʿ଺೫ᢰڜרᑇʳઌ࿛ NpIp = NsIsۖᖄ נ. IpٍױشՀ٨ֱऄ।ق: Ic = Ip = 2Po / (ӯ*VIN*Dmax) ӯ: ᠏ངᕴऱய෷ ֆڤᖄנڕՀ: ᙁנפ෷ : Po = LIp2ӯ / 2T ᙁԵሽᚘ : VIN = Ldi / dt ๻ di = Ipʿ׊ 1 / dt = f / Dmaxʿঞ: VIN = LIpf / Dmax ࢨ Lp = VIN*Dmax / Ipf ঞPoԾױ।ق੡ : Po = ӯVINf DmaxIp 2 / 2f Ip = 1/2ӯVINDmaxIp Р Ip = 2Po / ӯVINDmax Ղ٨ֆڤխ : VIN : ່՛ऴੌᙁԵሽᚘ (V) Dmax : ່Օᖄຏ׭़ֺ ቹ2 १ቍڤ᠏ངᕴंݮቹ Lp : ᧢ᚘᕴॣ్ሽტ (mH) Ip : ᧢ᚘᕴ଺ᢰ୽ଖሽੌ (A) বय़ᕴ䆒䅵䌘ற.xls 2 / 12 Lisc Oct. Lp : ᧢ᚘᕴॣ్ሽტ (mH) Ip : ᧢ᚘᕴ଺ᢰ୽ଖሽੌ (A) f : ᠏ང᙮෷ (KHZ) طՂ૪෻ᓵױवʿ᠏ངᕴऱ׭़ֺፖ᧢ᚘᕴऱרᑇֺ࠹ૻ࣍ၲᣂሽདྷ᧯રᚘፖ່ՕႃሽᲞሽੌ, ۖڼࠟႈਢᖄીၲᣂདྷ᧯ګءՂ֒ऱᣂ᝶ڂైʿڂڼ๻ૠழᏁጵٽەၦ೚࠷ॐ. ֘ᖿڤ᧢ངᕴԫ౳ՠ܂࣍ࠟጟՠ܂ֱڤ : 1. ሽტሽੌլຑᥛᑓڤDCM (Discontinuous Inductor Current Mode)ࢨጠ " ݙ٤౨ၦ᠏ང ": tonழ ᚏژڇ᧢ᚘᕴխऱࢬڶ౨ၦڇ֘ᖿࡌཚ (toffʼխຟ᠏ฝࠩᙁנጤ. 2. ሽტሽੌຑᥛᑓڤCCM ( Continuous Inductor Current Mode) ࢨጠ " լݙ٤౨ၦ᠏ང " : ᚏژ ʳڇ᧢ᚘᕴխऱԫຝ։౨ၦڇtoffأঅఎࠩՀԫଡtonࡌཚऱၲࡨ. DCMࡉCCMڇ՛ॾᇆႚᎠࠤᑇֱ૿ਢᲞլઌٵऱʿࠡंݮڕቹ3.ኔᎾՂʿᅝ᧢ངᕴᙁԵሽᚘVIN ʳڇԫଡለՕᒤ໮փ࿇س᧢֏ʿࢨਢ૤ሉሽੌ ILڇለՕᒤ໮փ᧢֏ழʿؘྥሀ။ထࠟጟՠ܂ֱڤˁڂڼ १ቍڤ᠏ངᕴ૞ޣڇDCM / CCMຟ౨᡹ࡳՠ܂ˁ܀ڇ๻ૠՂਢֺለܺᣄऱˁຏൄݺଚױאאDCM / CCMᜯ੺णኪ܂๻ૠഗᄷ.,ࠀ಻אሽੌᑓڤ൳ࠫPWM.ڼऄױڶயᇞެDCMழհٺጟംᠲʿ܀ڇ CCMழྤ௣ೈሽሁࡐڶऱլ᡹ࡳംᠲˁױشᓳᆏ൳ࠫᛩᏺ墿ᒳᠦ܅᙮੄ࡉ૾܅ᛳኪ᥼ᚨຒ৫ࠐᇞ ެCCMழڂႚᎠࠤᑇ " ׳תؓ૿ሿរ "֧ದऱլ᡹ࡳ. বय़ᕴ䆒䅵䌘ற.xls 2 / 12 Lisc Oct. (҇) DCM Waveforms ( ҈ ) CCM Waveforms ቹ3 DCM / CCM଺೫ᢰሽੌंݮቹ ( a ) ( b ) ( a ) I t I t II t t Full Load High VIN Mode Boundary Low VIN ( b ) বय़ᕴ䆒䅵䌘ற.xls 3 / 12 Lisc Oct. ቹ3 DCM / CCM଺೫ᢰሽੌंݮቹ ڇ᡹ࡳणኪՀʿ጖ຏᏺၦӔӥڇtonழऱ᧢֏ؘႊ࿛࣍ڇ"toffʵழऱ᧢֏ʿܡঞᄎທګ጖ज़堷ࡉ. ڂڼ, Ӕӥ = VIN ton / Np = Vs*toff / Ns ܛ᧢ᚘᕴ଺ᢰ៥ิޢרऱٗ௽˂ઞଖؘႊ࿛࣍೫ᢰ៥ิޢרٗ௽˂ઞଖ. ֺለቹˆխDCMፖCCMհሽੌंݮױאवሐ:DCMणኪՀڇTr tonཚၴʿᖞଡ౨ၦ᠏ฝंݮխࠠ ʳڶለ೏ऱ଺ᢰ୽ଖሽੌʿຍਢڂ੡ॣ్ሽტଖLpઌኙለ܅հਚʿࠌIp৺Ꮳ֒೏ࢬທګऱ૤૿யᚨਢᏺ ʳףԱ៥ิჾ౛(winding lose)ࡉᙁԵៀंሽ୲ᕴऱዮंሽੌʿൕۖ૞ޣၲᣂདྷ᧯ጥؘႊࠠڶ೏ሽੌࢭ ʳሉ౨Ժʿֱ౨ڜ٤ՠ܂. ڇCCMणኪխʿ଺ᢰ୽ଖሽੌለ܅ʿ܀ၲᣂདྷ᧯ڇtonणኪழڶለ೏ऱႃሽᲞሽੌଖˁڂڼᖄીၲ ʳᣂདྷ᧯೏פ෷ऱ௣౛ˁٵழ੡ሒګCCM,༉Ꮑ૞ڶለ೏ऱ᧢ᚘᕴ଺ᢰሽტଖLp,ڇ᧢ᚘᕴ጖ज़խࢬᚏ ʳژऱྲྀ塒౨ၦঞ૞ޣ᧢ᚘᕴऱ᧯ᗨለDCMழ૞Օʿۖࠡהߓᑇਢઌ࿛ऱ. ጵՂࢬ૪,DCMፖCCMऱ᧢ᚘᕴڇ๻ૠழਢഗءઌٵऱʿ׽ਢڇ଺ᢰ୽ଖሽੌऱࡳᆠڶࠄ೴ܑ ( CCMழ Ip = Imax - Imin ). বय़ᕴ䆒䅵䌘ற.xls 3 / 12 Lisc Oct. รԿᆏ FLYBACK TANSFORMER DESIGN ԫΕFLYBACK᧢ᚘᕴ๻ૠհەၦڂై: 1. ᚏ౨౨Ժ.ʳᅝ᧢ᚘᕴՠ܂࣍CCMֱڤழʿط࣍נ෼Աऴੌ։ၦʿᏁףAIR GAP,ࠌ጖֏ڴᒵٻ H ၗႜ඙ʿൕۖࠌ᧢ᚘᕴ౨ࢭ࠹ለՕऱሽੌʿႚᎠޓڍऱ౨ၦ. P = f*VeНBs H d B Ve: ጖ज़ࡉ௛Ꮌऱڶய᧯ᗨ. or P = 1/2Lp (Imax 2 - Imin 2) ڤխImax, Imin —— ੡ᖄຏࡌཚأʿࡨጤઌᚨऱሽੌଖ. ط࣍१ቍڤ᧢ᚘᕴ጖ज़׽ՠ܂ڇรԫွૻ጖ዩڃᒵʿ጖ज़ڇٌΕऴੌ܂شՀऱB.Hய࣠ፖAIR GAPՕ՛ڶയ֊ᣂᜤʿڕቹ4. Br Bs ڶ௛Ꮌ B ϦBac ڇHDC2ழྤ௛Ꮌ BDC Bs ቹ 4 ڶྤ௛Ꮌழ१ቍ᧢ᚘᕴ጖ज़ รԫွૻ጖ዩڃሁ ڇٌੌሽੌՀ௛ᎼኙӔBacྤޏ᧢ய࣠ʿ܀ኙӔHacലՕՕᏺףʿຍਢڶܓऱԫ૿ʿױڶயچ྇՛ COREऱڶய጖ᖄ෷ࡉ྇֟଺ᢰ៥ิऱሽტ. ڇऴੌሽੌՀ௛ᎼऱףԵױࠌCOREࢭ࠹ޓףՕऱऴੌሽੌװขسHDCʿۖBDCথፂ਍լ᧢ʿڂڼ ʳڇՕऱऴੌೣᆜՀױڶயچ߻ַ጖ज़堷ࡉʿຍኙ౨ၦऱᚏژፖႚᎠຟਢڶܓऱ. ᅝ֘ᖿ᧢ᚘᕴՠ܂ ʳ࣍CCMழʿڶઌᅝՕऱऴੌګٝʿຍழ༉ؘႊڶ௛Ꮌ. ؆ףऱٗઞଖʿרᑇࡉ጖ज़૿ᗨެࡳԱ˕ၗՂӔBacଖ; ऴੌऱؓ݁ሽੌଖʿרᑇࡉ጖ሁ९৫ެࡳ ʳԱ˛ၗՂHDCଖऱۯᆜ. ӔBacኙᚨԱӔHacଖऱᒤ໮ˁױא઎נʿ௛ᎼՕӔHac༉Օ. ڕڼʿ༉ؘႊʳڶߩ ʳജऱ጖ज़௛Ꮌࠐ߻ַ堷ࡉणኪࠀؓ᡹ऴੌګ։. ྤ௛Ꮌ H Ϧ Ϧ বय़ᕴ䆒䅵䌘ற.xls 4/12 Lisc Octবय़ᕴ䆒䅵䌘ற.xls 4/12 Lisc Oct 2. ႚᙁפ෷ .ʳط࣍COREޗற௽ࢤʿ᧢ᚘᕴݮणʻ।૿ᗨኙ᧯ᗨऱֺ෷),।૿ऱᑷ༏୴ʿւ๺ᄵ֒ʿՠ ʳ܂ᛩቼ࿛ऱլ௽ࡳࢤʿ๻ૠழլױނႚᙁפ෷ፖ᧢ᚘᕴՕ՛១໢ऱ܂ᜤᢀʿᚨီ௽ࡳ૞ޣ܂ެ࿜ˁڂڼ ʳش૿ᗨଊᗨऄޣ൓հAPଖຏൄ׽܂ԫጟ೶ە. ڶᆖ᧭հ๻ૠृຏൄױ࿨ٽ௽ࡳ૞ޣऴ൷ᒔࡳCORE ʳհޗᔆʿݮणʿ๵௑࿛. 3. ଺ʿ೫ᢰ៥ิޢרٗᑇᚨঅ਍ઌٵ.๻ૠழ࢓࢓ᄎሖࠩ೫ᢰרᑇᏁطૠጩࢬ൓։ᑇר࠷ᖞʿۖᖄ ʳી೫ᢰޢרٗᑇ܅࣍଺ᢰޢרٗᑇ. ڕڼ֧ದ೫ᢰऱޢרٗઞଖ՛࣍଺ᢰʿ੡ࠌࠡሒࠩؓᘝ༉ؘႊ྇ ʳ՛ tonழၴʿشለ९ऱழၴࠐႚᙁሽ౨ࠩᙁנጤ. ܛ૞ޣᖄຏ׭़ֺ˗՛࣍0.5. ࠌሽሁՠ܂࣍DCMᑓڤ. ʳ܀ڇڼᏁࣹრ: ૉ Lp֜ՕʿሽੌՂ֒඙෷՛,tonழၴԾ࿍ʻІ50%),ৰױ౨ڇʵᖄຏʵ࿨ޔʳழʿሽੌՂ֒ଖ ʳլՕʿנ෼ሽሁ޲ڶ౨ԺװႚᎠࢬᏁפ෷ऱ෼ွ. ຍԫ෼ွਢڂߓอ۞ݺפ෷ૻࠫʳհਚˁױຏመᏺף AIR GAPࡉ྇՛ሽტLp,ࠌ۞ݺૻࠫ܂شլᄎขسࠐᇞެڼംᠲ. 4. ሽტଖLp . ሽტLpڇ᧢ᚘᕴ๻ૠॣཚլ܂ૹរەၦ. ڂ੡Lp׽ᐙ᥼ၲᣂሽᄭऱՠ܂ֱڤ. ਚ ʳڼԫ೶ᑇطሽሁՠ܂ֱڤ૞ޣ܂ᓳᖞ. Lpऱ່Օଖፖ᧢ᚘᕴჾ౛່՛ଖਢԫીऱ. ڕ࣠๻ૠࢬ൓Lp ʳՕʿԾ૞ޣאCCMֱڤՠ܂ʿঞଶ؏ٽᔞ. ۖૉᏁאDCMֱڤՠ܂ழʿঞ׽౨شᏺՕAIR GAP,૾܅Lpࠐ ʳሒࠩ૞ޣʿຍᑌʿԫ֊݁լᄎࠌ᧢ᚘᕴೣᠦ๻ૠ. বय़ᕴ䆒䅵䌘ற.xls 5 / 12 Lisc Oct. ڇኔᎾ๻ૠխຏመᓳᖞ௛ᎼՕ՛ࠐᙇࡳ౨ၦऱႚᎠֱڤ(DCM / CCM) . ૉՠ܂࣍DCMֱڤʿႚᎠ ʳٵᑌऱ౨ၦ୽ଖሽੌਢৰ೏ऱ. ՠ܂խၲᣂTr,ᙁנԲᲞ᧯˗א֗ሽ୲˖ขس່Օऱჾ౛ʿ᧢ᚘᕴ۞ߪ ʳขس່ՕऱᎭჾ(I2R). ૉՠ܂࣍CCMֱڤʿሽტለՕழʿሽੌՂ֒඙෷܅ឈྥຍጟणउՀჾ౛່՛ʿ܀ ʳຍՕऱ጖֏ऴੌګ։ࡉ೏ऱ጖ዩലࠌՕڍᑇᥳ጖ढᔆขس጖堷ࡉ. ࢬא๻ૠழᚨࠌشԫଡމ಑ऱֱ ʳऄʿࠌ୽ଖሽੌՕ՛ᔞխʿ୽ଖፖऴੌڶயଖऱֺଖֺለᔞխ. ׽૞ᓳᖞԫଡٽᔞऱ௛Ꮌʿ༉ױ൓ࠩຍ ʳԫႚᎠֱڤʿኔ෼ᕳଃ՛ʿய෷ٽ෻հࠋउ. 5. ጖堷ࡉᛳழயᚨ.ʳڇᛳ᧢૤ሉणउՀʿܛᅝᙁԵሽᚘ੡VINmaxۖ૤ሉሽੌ੡IominழʿૉIoડྥᏺף, ʳঞ൳ࠫሽሁᄎمܛףᐈ౧ᓢא༼ࠎᇖךפ෷. ڼழʿᄎנ෼VINmaxࡉDmaxࠀژʿܛࠌ׽ਢԫଡॺൄ࿍ऱ ʳழၴʿ᧢ᚘᕴՈᄎנ෼堷ࡉʿ֧ದሽሁ؈൳. ੡܌ࣚڼԫᛳኪլߜயᚨʿױᚨشՀ૪ֱऄ: ᧢ᚘᕴਊ೏ᙁԵሽᚘ(VINmax),ᐈ౧ᓢ(Dmax)ၞ۩๻ૠ. ܛ๻ࡳ܅ऱӔ˕ՠ܂ᑓڤʿ೏ऱ଺ᢰ៥ิ רᑇʿ܀ڼֱऄհ౒រਢࠌ᧢ᚘᕴऱய෷૾܅. বय़ᕴ䆒䅵䌘ற.xls 5 / 12 Lisc Oct. ʳԲΕ᧢ᚘᕴ๻ૠੌ࿓ (Transformer Design Procedure) ᙇࡳCOREޗᔆ ೏BsΕ܅ჾ౛Ε܅ګء ެࡳCORE๵௑ Ap = AwAe = (Pt*10 4) / 2ӔB*f *J*Ku ՠ܂ᑓڤᒔᎁ CCM / DCM ๻ૠרᑇֺ n = VIN(min) / (Vo+Vf)*[Dmax / (1-Dmax)] ଺೫ᢰ୽ଖሽੌૠጩ ӔIpp = ӔIsp / n ; ӔIsp = ӔISB + ӔIs ૠጩ଺Ε೫ᢰሽტ Lp = n 2Ls ; Ls = (Vo + Vf)*(1-Dmax)Ts / ӔISB বय़ᕴ䆒䅵䌘ற.xls 6 / 12 Lisc Oct. Lp = n Ls ; Ls = (Vo + Vf)*(1-Dmax)Ts / ӔISB ӔISB = 2IOB / (1-Dmax) ଺Ε೫ᢰרᑇૠጩ Np = Lp*ӔIpp / (ӔB*Ae) ; Ns = Np / n AIR GAP๻ૠ lg = 0.4Ӹ*Lp*Ipp / (ӔB*Ae) = Np 2*Ӵo*Ae / Lp ៥ิᒵஉᒔࡳ dw = Ѕ(4AW / Ӹ) ࿨ዌ๻ૠ ጵٽەၦڜ๵ΕګءΕ࣐ࠫࢤΕ ؚᑌ֗ᚌ֏ᓳᖞ ሽ௛ࢤ౨Εᖲඳൎ৫࿛. বय़ᕴ䆒䅵䌘ற.xls 6 / 12 Lisc Oct. ร؄ᆏ Flyback Transformer Design Example ʳԫ. ๻ૠޡᨏ: step0 SPEC: VIN , fs , Vo , Io , D, ӯ, Ϧt , CCM&DCM , Loadणउ . step1 ᙇᖗCOREޗᔆʿᒔࡳϦB. step2 ᒔࡳCORE SIZEࡉTYPE. step3 ᒔࡳᜯ੺ሽੌ IOBΗ step4 ๻ࡳרᑇֺӄ,CHECK Dmax. step5 DCM / CCMᜯ੺ழԲڻೡ୽ଖሽੌϦISBૠጩ. step6 ૠጩ଺Ε೫ᢰሽტ(Lp&Ls). step7 ޣCCMழ೫ᢰ୽ଖሽੌϦIsp. step8 ޣCCMழ଺ᢰ୽ଖሽੌϦIpp. step9 ᒔࡳNp, Ns . step11 ૠጩᒵஉʿ۷ጩᎭ࿗׭ش෷. step12 ۷ጩჾ౛֗ᄵ֒. step13 ࿨ዌ๻ૠ. step14 SAMPLEࠫ܂,࿨ዌᒔᎁ. বय़ᕴ䆒䅵䌘ற.xls 7 / 12 Lisc Oct. step14 SAMPLEࠫ܂,࿨ዌᒔᎁ. step15 DQ֗๻ૠᚌ֏. ʳԲΕ๻ૠᜰࠏ ( DESIGN EXAMPLE I ) Step0. ઌᣂ๵௑࠷൓ (Specification) ࠏ : 60watts ADAPTER POWER (API-9621) MAIN X'FMR INPUT : 90 ~ 264 Vac 47 ~ 63 HZ ; ሽሁ൷ᒵڕቹ4. OUTPUT : DC 19V 0 ~ 3.16A ; Vcc = 12 VDC 0.1A ӯЊ 0.83 ; f s = 70KHZ ; Duty cylce over 50% Ϧt Љ40o (।૿) @ 60W ; X'FMRૻ೏ 21mm. CASE Surface Temperature Љ 78к . Note : Constant Voltage & Current Design (UC3843AD) Step1. ᙇᖗCOREޗᔆʿᒔࡳϦB ءࠏ੡ADAPTER DESIGN,ط࣍ᇠᣊীᖲཋᑷய࣠஁ʿਚᙇᖗCOREޗᔆᚨەၦ೏Bs,܅ჾ౛֗ ೏Ӵiޗᔆʿ࿨ٽګءەၦʿڇڼᙇشFerrite Core, אTDK հ PC40 or PC44੡ᚌᙇ, ኙֺTDK DATA BOOK, ױव PC44ޗᔆ໢ۯയ৫ՀᥳჾPcvࣔ᧩܅࣍PC40 , ່ٿᒔࡳᚨشPC44ޗ. বय़ᕴ䆒䅵䌘ற.xls 7 / 12 Lisc Oct. ઌᣂ೶ᑇڕՀ: Ӵi = 2400 ± 25% Pvc = 300KW / m 2 @100KHZ ,100к Bs = 390mT Br = 60mT @ 100к Tc = 215к ੡߻ַX'FMRנ෼ᛳኪ堷ࡉயᚨ, ڼࠏא܅Ϧ˕๻ૠ. ᙇ ϦB = 60%Bm, ܛϦB = 0.6 * (390 - 60) = 198mT Ѝ0.2 T Step2 ᒔࡳCore Sizeࡉ Type. 1> ޣcore APאᒔࡳ size AP= AW*Ae=(Pt*10 4)/(2ӔB*fs*J*Ku) = [(60/0.83+60)*104]/(2*0.2*70*103*400*0.2) = 0.59cm4 ڤխ Pt = Po /ӯ +Po ႚᎠפ෷ J : ሽੌയ৫ A / cm2 (300~500) Ku: ៥ิߓᑇ 0.2 ~ 0.5 . 2> ݮण֗๵௑ᒔࡳ. ݮणط؆ຝ֡՚ʿױ಻ٽBOBBIN, EMI૞ޣ࿛ެࡳʿ๵௑ױ೶ەAPଖ֗ݮण૞ޣۖެ ࡳ, ࿨ٽՂ૪଺ঞ, ਷ᔹTDKհDATA BOOK,ױवRM10, LP32/13, EPC30݁ױየߩՂ૪૞ ޣʿ܀RM10ࡉEPC30ױش៥ᒵ୲ᗨ݁՛࣍LP32/13,ڇڼᙇشLP32/13 PC44,ࠡ೶ᑇڕՀ: Ae = 70.3 mm2 Aw = 125.3mm2 AL = 2630±25% le = 64.0mm AP = 0.88 cm4 Ve = 4498mm3 Pt = 164W ( forward ) Step3 ۷ጩᜯ੺ሽੌ IOB ( DCM / CCM BOUNDARY ) ءࠏאILሒ80% Iomaxழ੡ᜯ੺រ๻ૠ᧢ᚘᕴ. ʳܛ : IOB = 80%*Io(max) = 0.8*3.16 = 2.528 A Step4 ޣרᑇֺ n n = [VIN(min) / (Vo + Vf)] * [Dmax / (1-Dmax)] VIN(min) = 90*Ѕ2 - 20 = 107V = [107 / (19 + 0.6)] *[0.5 / (1- 0.5)] = 5.5 Ѝ 6 רֺ nʳױ࠷ 5 ࢨ 6,ڇڼ࠷ 6 א૾܅ᥳჾʿ܀Ꭽჾലڶࢬᏺף. CHECK Dmax Dmax = n (Vo +Vf) / [VINmin + n (Vo + Vf)] = 6*(19 + 0.6) /[107 + 6*(19 + 0.6)] = 0.52 বय़ᕴ䆒䅵䌘ற.xls 8 / 12 Lisc Oct. Step5 ޣCCM / DCMᜯ੺णኪհ೫ᢰ୽ଖሽੌӔISB. ӔISB = 2IOB / (1-Dmax) = 2*2.528 / (1-0.52) = 10.533 Step6 ૠጩڻ్ሽტ Ls ֗଺ᢰሽტ Lp. Ls = (Vo + Vf)(1-Dmax) * Ts / ӔISB = (19+0.6) * (1-0.52) * (1/70000) / 10.533 = 12.76 uH Lp = n 2 Ls = 62 * 12.76 = 459.4 uH Ѝ 460 uH ڼሽტଖ੡ᜯ੺ሽტʿૉᏁሽሁՠ܂࣍CCM,ঞױᏺՕڼଖʿૉᏁՠ܂࣍DCMঞױᔞᅝᓳ՛ڼ ଖ. Step7 ޣCCMழ೫ᢰ୽ଖሽੌӔIsp. Io(max) = (2ӔIs + ӔISB) * (1- Dmax) / 2 РӔIs = Io(max) / (1-Dmax) - (ӔISB / 2 ) РӔIsp = ӔISB +ӔIs = Io(max) / (1-Dmax) + (ӔISB / 2 ) = 3.16 / (1-0.52) + 10.533 / 2 = 11.85A Step8 ޣCCMழ଺ᢰ୽ଖሽੌӔIpp. Is t Is t Ϧ Ϧ Ϧ Ϧ বय़ᕴ䆒䅵䌘ற.xls 9 / 12 Lisc Oct. Step8 ޣCCMழ଺ᢰ୽ଖሽੌӔIpp. ӔIpp = ӔIcp / n = 11.85 / 6 = 1.975 A Step9 ᒔࡳNpΕNs . 1> Np Np = Lp * ӔIpp / (ӔB* Ae) = 460*1.975 / (0.2*70.3) = 64.6 Ts ڂૠጩ࿨࣠੡։ᑇרʿەᐞଫ᥽଺Ε೫ᢰ៥ิרᑇ࠷ᖞʿࠌ᧢ᚘᕴԫΕԲڻ៥ิڶઌٵऱڜ רଖʿਚᓳᖞ Np = 60Ts OR Np = 66Ts ەၦڇ๻ࡳרᑇֺnழʿբڶᎭჾᏺףʿ੡ጐၦؓᘝPfeፖPcu,ڇڼ٣ᙇ Np = 60 Ts. 2> Ns Ns = Np / n = 60 / 6 = 10 Ts 3> Nvcc ޣޢרٗ௽ᑇVa Va = (Vo + Vf) / Ns = (19+0.6) / 10 = 1.96 V/Ts Р Nvcc = (Vcc + Vf) / Va = (12+1) / 1.96 = 6.6 7 Ts Step10 ૠጩAIR GAP . lg = Np 2ʽӴo*Ae / Lp = 60 2*4*3.14*10-7*70.3 / 0.46 = 0.69 mm t বय़ᕴ䆒䅵䌘ற.xls 9 / 12 Lisc Oct. Step11 ૠጩᒵஉdw,۷ጩᎭ࿗׭ڶ෷. 1> dwp Awp = Iprms / J Iprms = Po / ӯ / VIN(min) = 60/0.83/107 = 0.676A Awp = 0.676 / 4 ˝࠷4A / mm 2 or 5A / mm2 = 0.169mm2 ࠷ӥ0.35mm*2 2> dws Aws = Io / J = 3.16 / 4 = 0.79 mm 2 ӥ1.0 mm ەၦױ៥ࢤ֗᝟ᓅயᚨʿ७شڍᒵࠀ៥ʿ໢ᒵլᚨՕ࣍ӥ0.4, ӥ0.4հAw= 0.126mm 2, ঞ 0.79 / 0.126 = 6.27 6 ܛNs७شӥ0.4 * 6 . 3> dwvcc Awvcc = Iv / J = 0.1 / 4 = 0.025mm 2 ӥ0.18mm Ղ૪៥ิᒵஉ݁א4A / mm2հૠጩʿא૾܅Ꭽჾʿૉ࿨ዌ๻ૠழᒵץመ઴ʿױᔞᅝᓳᖞ˝հ࠷ଖ. 4> ۷ጩᎭ࿗׭ڶ෷. 0.4Aw ЊNp*rpʽӸ(1/2dwp) 2 + Ns*rsʽӸ(1/2dws) 2 + Nvcc*rvʽӸ(1/2dwv) 2 বय़ᕴ䆒䅵䌘ற.xls 10 / 12 Lisc Oct. 0.4Aw ЊNp*rpʽӸ(1/2dwp) + Ns*rsʽӸ(1/2dws) + Nvcc*rvʽӸ(1/2dwv) 0.4Aw Њ60*2*3.14*(0.35/2)2+10*6*3.14+(0.4/2)2+7*3.14*(0.18/2)2 Њ 11.54 + 7.54 + 0.178 = 19.26 0.4 * 125.3 = 50.12 50.12 > 19.26 OK Step12 ۷ጩჾ౛Εᄵ֒. 1> ޣנٺ៥ิհᒵ९. 2> ޣנٺ៥ิհRDCࡉRac @100к 3> ޣٺ៥ิհჾ౛פ෷ 4> ף᜔ٺ៥ิհפ෷ჾ౛ʻޣנTotalଖ) ڕ : Np = 60Ts , LP32/13BOBBIN៥ᒵؓ݁ר९ 4.33cm ঞ lNP = 60*4.33 = 259.8 cm Ns = 10Ts ঞ lNS = 10*4.33 = 43.3 cm বय़ᕴ䆒䅵䌘ற.xls 10 / 12 Lisc Oct. Nvcc = 7Ts ঞ lNvc = 7 * 4.33 = 30.31cm ਷ᒵॴ।ױव : ӥ0.35mm WIRE RDC = 0.00268Ө/cm @ 100к ӥ0.40mm WIRE RDC = 0.00203 Ө/cm @ 100к ӥ0.18mm WIRE RDC = 0.0106 Ө/cm @ 100к R@100к = 1.4*R@20к ޣ೫ᢰٺሽੌଖ. բवIo = 3.16A. ೫ᢰؓ݁୽ଖሽੌ : Ispa = Io / (1-Dmax ) = 3.16 / (1- 0.52) = 6.583A ೫ᢰऴੌڶயሽੌ : Isrms = Ѕθ(1-Dmax)*I 2 spaι = Ѕ(1- 0.52)*6.583 2 = 4.56A ೫ᢰٌੌڶயሽੌ : Isac = Ѕ(I 2 srms - Io 2) = Ѕ(4.562-3.162) = 3.29A ޣ଺ᢰٺሽੌଖ : П Np*Ip = Ns*Is ଺ᢰؓ݁୽ଖሽੌ : Ippa = Ispa / n = 6.58 / 6 = 1.097A ଺ᢰऴੌڶயሽੌ : Iprms = Dmax * Ippa = 1.097 * 0.52 = 0.57A ଺ᢰٌੌڶயሽੌ : Ipac = ЅD*I 2 ppa = 1.097*Ѕ0.52 = 0.79A ޣٺ៥ิٌΕऴੌሽॴ. বय़ᕴ䆒䅵䌘ற.xls 11 /12 Lisc Oct. ޣٺ៥ิٌΕऴੌሽॴ. ଺ᢰ : RPDC = ( lNp * 0.00268 ) / 2 = 0.348Ө Rpac = 1.6RPDC = 0.557Ө ೫ᢰ : RSDC = ( lNS*0.00203 ) /6 = 0.0146Ө Rsac = 1.6RSDC = 0.0243Ө Vcc៥ิ : RDC =30.31*0.0106 = 0.321Ө ૠጩٺ៥ิٌऴੌჾ౛: ೫ᢰऴੌჾ : PSDC = Io 2RSDC = 3.16 2 * 0.0146 = 0.146W ٌੌჾ : Psac = I2sac*Rsac = 3.29 2*0.0234 = 0.253W Total : Ps = 0.146 + 0.253 = 0.399 W ଺ᢰऴੌჾ : PPDC = Irms 2RPDC = 0.57 2 * 0.348 = 0.113W ٌੌჾ : Ppac = I 2 pac*Rpac = 0.79 2*0.557 = 0.348W ࢙ฃVcc៥ิჾ౛ʻڂࠡሽੌ੷՛) Total Pp = 0.461W ᜔ऱᒵഎჾ౛ : Pcu = Pc + Pp = 0.399 + 0.461 = 0.86 W বय़ᕴ䆒䅵䌘ற.xls 11 /12 Lisc Oct. 2> ૠጩᥳჾ PFe ਷TDK DATA BOOKױवPC44ޗհϦB = 0.2T ழ,Pv = 0.025W / cm2 LP32 / 13հVe = 4.498cm3 PFe = Pv * Ve = 0.025 * 4.498 = 0.112W 3> Ptotal = Pcu + PFe = 0.6 + 0.112 = 0.972 W 4> ۷ጩᄵ֒ʳϦt ࠉᆖ᧭ֆڤ Ϧt = 23.5PӢ˂ЅAp = 23.5 * 0.972 / Ѕ0.88 = 24.3 к ۷ጩհᄵ֒Ϧ̇՛࣍SPEC,๻ૠOK. Step13 ࿨ዌ๻ૠ ਷LP32 / 13 BOBBINհ៥ᒵ༏ᐈ੡ 21.8mm. ەၦڜ๵၏ᠦհऎ૿၏ᠦլ՛࣍6.4mm. ੡྇՛LK༼೏ய෷ʿ७شԿࣔए࿨ዌʿࠡ࿨ዌڕՀ : X'FMR࿨ዌ : Np #1 3.2 / 3.2 2 -- A ӥ0.35 * 2 30 1L SHI #2 3.2 / 3.2 SHI- 4 2mils * 12 1 3L Ns #3 3.2 / 3.2 8.9 - 6.7 ӥ0.4 * 6 10 3L SHI #4 3.2 / 3.2 SHI- 4 2mils * 12 1 1L বय़ᕴ䆒䅵䌘ற.xls 12 / 12 Lisc Oct. SHI #4 3.2 / 3.2 SHI- 4 2mils * 12 1 1L Np #5 3.2 / 3.2 A -- 1 ӥ0.35 * 2 30 1L Nvcc #6 3.2 / 3.2 3 -- 4 ӥ0.18 7 2L #7 ຑʳ࿨ʳࠟ A រ 2L ଺ข঴(20888-0001I)࿨ዌ ( L = 550 ~ 580 uH @20KHz 1.0V ) #1 TAPE 1L Np #2 4.0 / 4.0 2 -- A AWG#27 * 2 30 1L SHI #3 4.0 / 4.0 SHI- 4 2mils * 12 1 3L Ns #4 4.0 / 4.0 8.9 - 6.7 AWG#27 * 6 10 3L SHI #5 4.0 / 4.0 SHI- 4 2mils * 12 1 1L Np #6 4.0 / 4.0 A -- 1 AWG#27 * 2 30 1L Nvcc #7 4.0 / 4.0 3 -- 4 AWG#30 7 2L #8 ຑʳ࿨ʳࠟ A រ 2L বय़ᕴ䆒䅵䌘ற.xls 12 / 12 Lisc Oct.বय़ᕴ䆒䅵䌘ற.xls 12 / 12 Lisc Oct. ֆࠫዪץᒵ๵௑। (JIS 0Ε˄Ε˅Ε3) ᖄ᧯ ᖄᒵ 0ጟ ່Օ ່Օ ૹʳၦ ᖄ᧯ ऴஉ ኲ૿ᗨ ່Օ ່՛ ່Օ ᖄ᫿ሽॴ ່՛ ່Օ ່՛ ່Օ ᖄ᫿ሽॴ ऴஉ ݙګ؆உ ؼᓂদ ݙګ؆உ Ө/ km ؼᓂদ ݙګ؆உ ؼᓂদ ݙګ؆உ Ө/ km kg / km (mm) (mm2 ) (mm) (mm) (mm) ( 20к ) (mm) (mm) (mm) (mm) ( 20к ) (mm) 0.04 0.0013 0.03 0.056 0.002 0.052 15670 0.01153 0.04 0.05 0.0020 0.04 0.069 0.003 0.064 10240 0.01745 0.05 0.06 0.0028 0.04 0.081 0.003 0.075 6966 0.02595 0.06 0.07 0.0038 0.04 0.091 0.003 0.085 4990 0.035 0.07 0.08 0.0050 0.05 0.103 0.003 0.097 3778 0.046 0.08 0.09 0.0064 0.05 0.113 0.003 0.107 2959 0.058 0.09 0.10 0.0079 0.156 0.009 0.140 2647 0.05 0.125 0.003 0.118 2381 0.0698 0.1 0.11 0.0095 0.166 0.009 0.150 2153 0.05 0.135 0.003 0.128 1957 0.087 0.11 0.12 0.0113 0.180 0.010 0.162 1786 0.06 0.147 0.004 0.139 1636 0.1006 0.12 0.13 0.0133 0.190 0.010 0.172 1505 0.06 0.157 0.004 0.149 1389 0.13 0.14 0.0154 0.200 0.010 0.182 1286 0.06 0.167 0.004 0.159 1193 0.1368 0.14 0.15 0.0177 0.210 0.010 0.192 1111 0.06 0.177 0.004 0.169 1037 0.15 0.16 0.0201 0.222 0.011 0.204 969.5 0.07 0.189 0.005 0.181 908.8 0.1788 0.16 0.17 0.0227 0.232 0.011 0.214 853.5 0.07 0.199 0.005 0.191 803.2 0.17 0.18 0.0254 0.246 0.012 0.226 757.2 0.08 0.211 0.005 0.202 715 0.2263 0.18 0.19 0.0284 0.256 0.012 0.236 676.2 0.08 0.221 0.005 0.212 640.6 0.19 0.20 0.0314 0.266 0.012 0.246 607.6 0.08 0.231 0.005 0.222 577.2 0.2793 0.2 0.21 0.0346 0.276 0.012 0.256 549 0.08 0.241 0.005 0.232 522.8 0.21 0.22 0.0380 0.286 0.012 0.266 498.4 0.08 0.252 0.005 0.243 480.1 0.22 0.23 0.0415 0.298 0.013 .0.278 454.5 0.09 0.264 0.006 0.255 438.6 0.3694 0.23 0.24 0.0452 0.308 0.013 0.288 416.2 0.09 0.274 0.006 0.265 402.2 0.24 0.25 0.0491 0.318 0.013 0.298 382.5 0.09 0.284 0.006 0.275 370.2 0.25 0.26 0.0531 0.330 0.013 0.310 358.4 0.09 0.294 0.006 0.285 341.8 0.472 0.26 0.27 0.0573 0.340 0.013 0.320 331.4 0.09 0.304 0.006 0.295 316.6 0.27 0.28 0.0616 0.350 0.013 0.330 307.3 0.09 0.314 0.006 0.305 294.1 0.28 0.29 0.0661 0.360 0.013 0.340 285.7 0.09 0.324 0.006 0.315 273.9 0.5872 0.29 0.30 0.0707 0.374 0.014 0.352 262.9 0.01 0.337 0.007 0.327 254 0.6435 0.3 0.32 0.0804 0.394 0.014 0.372 230 0.01 0.357 0.007 0.347 222.8 0.7194 0.32 0.35 0.0962 0.424 0.014 0.402 191.2 0.01 0.387 0.007 0.377 185.7 0.8553 0.35 0.37 0.1075 0.446 0.014 0.424 170.6 0.01 0.407 0.007 0.397 165.9 0.37 0.40 0.1257 0.480 0.015 0.456 145.3 0.011 0.439 0.007 0.429 141.7 1.118 0.4 0.45 0.1590 0.532 0.016 0.508 114.2 0.011 0.49 0.007 0.479 112.1 1.414 0.45 0.50 0.1963 0.586 0.017 0.560 91.43 0.012 0.542 0.008 0.531 89.95 1.745 0.5 0.55 0.2376 0.646 0.017 0.620 78.15 0.012 0.592 0.008 0.581 74.18 2.112 0.55 0.60 0.2827 0.698 0.017 0.672 65.26 0.012 0.644 0.008 0.632 62.64 2.513 0.6 0.65 0.3318 0.752 0.018 0.724 55.31 0.012 0.694 53.26 2.95 0.65 0.70 0.3848 0.804 0.019 0.776 47.47 0.013 0.746 45.84 3.421 0.7 0.75 0.4418 0.860 0.020 0.830 41.19 0.014 0.798 39.87 0.75 0.80 0.5027 0.914 0.021 0.882 36.08 0.015 0.852 35.17 4.469 0.8 0.85 0.5675 0.966 0.022 0.934 31.87 0.015 0.904 31.11 0.85 0.90 0.6362 1.020 0.023 0.986 28.35 0.016 0.956 27.71 5.656 0.9 0.95 0.7088 1.072 0.024 1.038 25.38 0.017 1.008 24.84 0.95 1.00 0.7854 1.138 0.025 1.102 23.33 0.017 1.062 22.49 6.982 1 1.10 0.9503 1.242 0.026 1.204 19.17 1.1 1.20 1.1310 1.342 0.026 1.304 16.04 10.06 1.2 1.30 1.3273 1.448 0.027 1.408 13.61 1.3 1.40 1.5394 1.548 0.027 1.508 11.7 13.68 1.4 1.50 1.7671 1.654 0.028 1.612 10.16 1.5 1.60 2.0106 1.754 0.028 1.712 8.906 17.88 1.6 1.70 2.2698 1.856 0.029 1.814 7.781 1.7 1.80 2.5447 1.956 0.029 1.914 7.007 22.63 1.8 1.90 2.8353 2.062 0.030 2.018 6.278 1.9 2.00 3.1416 2.162 0.030 2.118 5.656 27.93 2 2.10 3.4636 2.266 0.031 2.220 5.123 31 2.1 2.20 3.8013 2.368 0.032 2.322 4.662 2.2 2.30 4.1548 2.460 0.032 2.422 4.26 36.94 2.3 2.40 4.5239 2.574 0.033 2.562 3.908 2.4 2.50 4.9087 2.678 0.034 2.682 3.598 2.5 2.60 5.3093 2.778 0.034 2.728 3.324 47.29 2.6 2.70 5.7256 2.878 0.034 2.828 3.079 2.7 2.80 6.1575 2.978 0.034 2.982 2.861 2.8 2.90 6.6052 3.078 0.034 3.028 2.665 58.72 2.9 3.00 7.0686 3.178 0.034 3.128 2.489 64.76 3 3.20 8.0425 3.388 0.034 3.338 2.198 71.49 3.2 1ጟ 2ጟ 3ጟ বय़ᕴ䆒䅵䌘ற.xls ॵٙ 1