iw3612与iw3614调光LED电源设计方法

Step by Step Design Process Step by Step Design Process with iWatt Controllerwith iWatt Controller 䆒䅵ℹ偸ˈᓔྟԴⱘ䇗ܝ偅ࡼ䆒䅵 ƒ Step 1 ḍ᥂䕧ܹ⬉य़䗝প䍋ࡼ⬉䰏Rvinƒ Step 1 –ḍ᥂䕧ܹ⬉य़,䗝প䍋ࡼ⬉䰏Rvin ੠ࡴ䗳ਃࡼ⬉䏃䰏ؐ ƒ Step 2 –䗝পBLEEDER⬉䰏 ƒ Step 3 –䗝পPFC⬉ᛳStep 3 䗝পPFC⬉ᛳ ƒ Step 4 –বय़఼䆒䅵, MOSET ঞ䕧ߎᭈ⌕ㅵ䗝ᢽ ƒ Step 5 – I sense ঞ Vsense䗝প ƒ Step 6 – Bulk Bulk⬉ᆍ⬉ᆍVCCVCC⬉ᆍঞ⬉ᆍঞNOISENOISEᮕ䏃⬉ᆍᮕ䏃⬉ᆍp ƒ Step 7 – EMI FILTER ᥼㤤 ƒ Step 8 – PCB䆒䅵Пখ㗗ᓎ䆂 ⳌԡẔ⌟੠䇗ܝ఼Ẕ⌟⬉䏃ⳌԡẔ⌟੠䇗ܝ఼Ẕ⌟⬉䏃 䗝ᢽ䗝ᢽ Vin Vin ⬉䰏⬉䰏 K i 3612K i 3612ݙ䚼㞾ᅮНⱘ↨ؐখ᭄ݙ䚼㞾ᅮНⱘ↨ؐখ᭄Kvin: 3612Kvin: 3612ݙ䚼㞾ᅮНⱘ↨ؐখ᭄ݙ䚼㞾ᅮНⱘ↨ؐখ᭄ 120Vac 60Hz120Vac 60Hz 230Vac 50Hz 230Vac 50Hz ݙ䚼⬉䰏ᰃݙ䚼⬉䰏ᰃi 2 5k h +/i 2 5k h +/ 1%1% 0086.0 Kvin 0043.0 KvinVin Vin ⬉䰏⬉䰏 ݙ䚼⬉䰏ᰃݙ䚼⬉䰏ᰃis 2.5kohm+/is 2.5kohm+/--1%1% :k52 ICICݙ䚼⬉䰏ݙ䚼⬉䰏2.5K2.5K : :�: kkkR Vin 19.2885.2 0086.0 5.2 For low line input (120Vac) designFor low line input (120Vac) design For High line input (230Vac) designFor High line input (230Vac) design: :�: kkkR Vi 9.5785.2 5.2 • RVIN ৃҹᦤկVCCܙ⬉⬉⌕ • ICݙ䚼䴴Ẕ⌟VIN PIN⬉य़ᴹ߸ᮁ䕧ܹ⬉य़ⱘ催Ԣ g p ( ) gg p ( ) g:: kkR Vin 9.5785.2 0043.0 ICݙ䚼䴴Ẕ⌟VIN PIN⬉य़ᴹ߸ᮁ䕧ܹ⬉य़ⱘ催Ԣ, • Rvin⬉䰏ⱘপؐӮᕅડCHOPPING BOOST ⱘON TIMET㗠ᕅડPFؐ • ᥼㤤পؐ᥼㤤পؐ 120VAC: RVIN =150k+130K 230VAC: RVIN=270+300K ֓Ѣ䇗ᭈⱘᖿ䗳ਃࡼ⬉䏃֓Ѣ䇗 ⱘᖿ ਃࡼ 䏃 ••䍋ࡼ⬉⌕Ң䍋ࡼ⬉⌕ҢR3 R4R3 R4䗮䖛䗮䖛ICICݙ䚼ⱘݙ䚼ⱘ DIODEDIODE㒭㒭VCCVCC⬉ᆍܙ⬉⬉ᆍܙ⬉ InputInput ••಴Ў಴ЎDD--FETFET≵᳝䋳৥⬉य़㗠ᇐ䗮≵᳝䋳৥⬉य़㗠ᇐ䗮, R9 , R9 R10R10Ё᳝⬉⌕㒭Ё᳝⬉⌕㒭VCCVCCܙ⬉ܙ⬉ ••VCCVCC䖒ࠄ䖒ࠄ12V12VᓔྟᎹ԰ᓔྟᎹ԰, VIN PIN, VIN PIN⬉य़⬉य़ࠄࠄ ᓔྟ ԰ᓔྟ ԰,, বԢবԢ, Q3 , Q3 ⱘⱘVGSVGSবЎ䋳⬉य़㗠݇ᮁবЎ䋳⬉य़㗠݇ᮁ ••䗝ᢽ䗝ᢽDD--FETFET೼ਃࡼৢߛᮁ೼ਃࡼৢߛᮁR9 R10, R9 R10, ޣޣ ᇥࡳ㗫ᇥࡳ㗫 ••䇗ᭈ䇗ᭈR9R10R9R10ৃҹᬍবਃࡼᯊ䯈ৃҹᬍবਃࡼᯊ䯈,,DiodeDiode MOSFETMOSFET 2 5K2 5K2.5K2.5K ARKARK ᥼㤤ؐ:ਃࡼᯊ䯈0.5S᥼㤤ؐ ਃࡼᯊ䯈 120Vac R9 R10: 68KX2 230Vac R9 R10: 120KX2 Bleeder⬉䏃 䗝ᢽ䗝ᢽbleederbleeder⬉䰏⬉䰏 • ˥˟ਃࡼⱘᯊ׭Ӯ᳝ϝϾHalf Cycleᇐ䗮ˈ㑺30mS߱˥˟ਃࡼⱘᯊ׭Ӯ᳝ϝϾHalf Cycleᇐ䗮ˈ㑺30mS,߱ 䆩࣪䇗ܝ఼⢊ᗕ, Bleeder ⬉䰏೼ℸ݊䯈ᅠܼᇐ䗮ˈ䇗ܝ ఼Ꮉ԰Ѣ⬉䰏䋳䕑ᴵӊϟˊ • ড়⧚ⱘBleeder Source⬉䰏R6ᦤկ೎ᅮⱘHolding VgVg ড়⧚ⱘBleeder Source⬉䰏R6ᦤկ೎ᅮⱘHolding Current , г䰤ࠊњ䕧ܹ⬉⌕ዄؐˈ Vg=Vcc=12V Vgs=5V I_R6* R6+Vgs<12V VgVg If R6=47ohm I bleeder <148mA • ˮˑৃҹޣᇥ߱䆩࣪ᯊ䯈೼˭ˎϞⱘ⬉य़ᑨ࡯(ࡳ㗫), II R6R6 ˮˑৃҹޣᇥ߱䆩࣪ᯊ䯈೼˭ˎϞⱘ⬉य़ᑨ࡯(ࡳ㗫), ҹঞޣᇥ೼ৃ᥻⸙ߛⳌᇐ䗮ⶀ䯈ⱘ⬉⌕ᇪዄ,ড়⧚ⱘˮˑ 䰏ؐৃҹֱ䆕˭ˎঞ Bleeder⬉䏃ⱘৃ䴴ᗻ ••᥼㤤䗝⫼᥼㤤䗝⫼ Vin 100Vin 100--120Vac: 120Vac: R5=220R5=220--270 ohm 1W (270 ohm 1W (☠㛊䆒䅵Ё˅☠㛊䆒䅵Ё˅ R6=47 ohm 1/2WR6=47 ohm 1/2W Vin 220Vin 220--240Vac: R5=390240Vac: R5=390--470 ohm 1W (470 ohm 1W (☠㛊䆒䅵Ё˅☠㛊䆒䅵Ё˅ R6=47ohm 1/2WR6=47ohm 1/2W BOOST⬉ᛳ䆒䅵䆒䅵 䗝ᢽ䗝ᢽchopping Boost inductance chopping Boost inductance LcLc Chooping boost ONChooping boost ON--TimeTimeއᅮѢ˲އᅮѢ˲inin催Ԣ催Ԣ ܕ䆌ܕ䆌ChoopingChooping⬉ᛳᎹ԰Ѣ⬉⌕䖲㓁੠佅੠⢊ᗕ⬉ᛳᎹ԰Ѣ⬉⌕䖲㓁੠佅੠⢊ᗕ OnOn--statestate Design spec Ferrite Wire Turns 120Vac 230Vac 4-6W PF>0.7 3612 EE8.3 0.11 300T 4.5mH 5.5mH ܕ䆌ܕ䆌ChoopingChooping⬉ᛳᎹ԰Ѣ⬉⌕䖲㓁੠佅੠⢊ᗕ⬉ᛳᎹ԰Ѣ⬉⌕䖲㓁੠佅੠⢊ᗕ OffOff--statestate 4-6W PF>0.9 3612 EE8.3 0.11 300T 5 mH 6mH 8-10W PF>0.7 3612 EE8.3 0.11 300T 2.5mH 3.5mH 8-10W PF>0.9 3614 EE8.3 0.11 300T 2.5mH 3.5mH 12-15W PF>0.7 3612 EE10 0.21 210T 3.0mH 3.8mH 12-15W PF>0.9 3614 EE10 0.21 210T 3.0mH 3.8mH 18-20W PF>0.7 3612 EE13 0.32 145T 2.0mH 3.2mH 18-20W PF>0.9 3614 EE13 0.32 145T 2.0mH 3.2mH Complex mode at DCM or Complex mode at DCM or CCM and saturationCCM and saturation 䇗ᭈ⬉ᛳ䞣ৃҹᬍবˬˢঞ˰ˤˠ䇗ᭈ⬉ᛳ䞣ৃҹᬍবˬˢঞ˰ˤˠ বय़఼䆒䅵বय़ 䆒䅵 Following iW3612 Worksheet 䕧ߎ⬉य़⬉⌕x䕧ߎ⬉य़⬉⌕ x䕧ܹ⬉य़㣗ೈঞ乥⥛ xᅮНBULK⬉ᆍϞⱘ⬉य़ x乘ԄᎹ԰乥⥛⚍(55-100KHz) 㒣偠࣪ⱘᬜ⥛乘ᳳx㒣偠࣪ⱘᬜ⥛乘ᳳ x㒣偠࣪ⱘ݇䬂఼ӊ䗝প ⺕㢃໻ᇣ㉏߿ 䕧ߎᭈ⌕ㅵ MOSFETMOSFET খ㗗IWATTⱘᑨ⫼䆒䅵 x᳔催乥⥛⚍䆒ᅮ(150-180KHz) বय़఼೜↨ⱘ䆒ᅮxবय़఼೜↨ⱘ䆒ᅮ 㓐ড়㗗㰥MOSFETঞᭈ⌕ㅵⱘ⬉य़ᑨ࡯, ঞ㋏㒳ᬜ⥛ⱘӬ࣪ xবय़఼߱㑻ջ೜᭄NP 㓐ড়㗗㰥বय़఼ⱘᎹ㡎㽕∖ৃ㒩ࠊᗻ㓐ড়㗗㰥বय़఼ⱘᎹ㡎㽕∖,ৃ㒩ࠊᗻ, 㒓ᕘ,ሖ᭄,EMI,㒧ᵘ xবय़఼⃵㑻ջ೜᭄NS 㓐ড়㗗㰥বय़఼ⱘᎹ㡎㽕∖,⬉⌕໻ᇣ ⹂ᅮবय़఼ⱘ⬉ᛳ䞣x⹂ᅮবय़఼ⱘ⬉ᛳ䞣 x䞡໡ẔᶹҹϞⱘ৘⾡乘䆒ᴵӊ ⬉⌕⬉य़Ẕ⌟䚼ߚখ᭄य़Ẕ⌟䚼ߚখ᭄ Following iW3612Following iW3612 Worksheet Worksheet • VCC㒩㒘䆒䅵 VCC⬉य़㣗ೈ,᥼㤤9-15V, བᵰ䳔㽕ᆑ䕧ߎ⬉य़㣗ೈ, • VSESNE⬉䰏⹂ᅮ Vsense Voltage<1.538V བᵰ䳔㽕ᆑ䕧ߎ य़㣗ೈ, 䇋㗗㰥FORWORD կ⬉ •VSENSE㒩㒘೜᭄ •⬉⌕Ẕ⌟⬉䰏 •⊼ᛣ⬉䰏ࡳ⥛ঞDe-rating ⬉ᆍⱘ԰⫼ঞখ᭄ᆍⱘ԰⫼ঞখ᭄ • Bulk⬉ᆍখ᭄ F ll i iW3612 W k h t •਌ᬊಲ䏃খ㗗᥼㤤ؐ Following iW3612 Worksheet Hi PF ᑨ⫼Ё⊼ᛣ⬉य़ؐ(450V??) 470pF~4.7nF >200V •C1 parallel with bleeder resistor ᦤ催ᬜ⥛ ⊼ᛣA dibl ঞ⬉य़ᑨ࡯⊼ᛣAudibleঞ⬉य़ᑨ࡯ •䕧ߎⒸ⊶⬉ᆍ 乱ᅮ䕧ߎ⬉य़ঞOVP⬉य़ Ripple current •I sense Filter spike, Improve Line regulation with RC •Vcc⬉ᆍ ਃࡼᯊ㓈ᣕ䎇໳ⱘICկ⬉ ᥼㤤 Vi ⬉ᆍ•Vsense ᥼㤤47uF •Vin⬉ᆍ Bypass noise, ᥼㤤1nF •Vsense Bypass noise, ᥼㤤22pF EMI Filter •• 33--10W Design with simple LC filter10W Design with simple LC filter L: 4 6mH Drum ChokeL: 4 6mH Drum ChokeᎹᄫൟ⺕㢃Ꮉᄫൟ⺕㢃L: 4~6mH Drum ChokeL: 4~6mH Drum ChokeᎹᄫൟ⺕㢃Ꮉᄫൟ⺕㢃 33--5W 6X8mm 0.11mm 450Turns5W 6X8mm 0.11mm 450Turns 55--10W 8X10mm 0.15mm 390 Turns10W 8X10mm 0.15mm 390 Turns XX--cap:cap: 0.033uF0.033uF YY--capcap : 470p~1nF: 470p~1nF, Bypass solve common noise , Bypass solve common noise For Low power designFor Low power design •• 1010--20W Design with 2 Stage LC filter20W Design with 2 Stage LC filter L1 L2 4 6 H D Ch kL1 L2 4 6 H D Ch k Ꮉᄫൟ⺕㢃Ꮉᄫൟ⺕㢃 p gp g L1 L2 : 4~6mH Drum ChokeL1 L2 : 4~6mH Drum ChokeᎹᄫൟ⺕㢃Ꮉᄫൟ⺕㢃 8X10mm 0.15mm 390 Turns 8X10mm 0.15mm 390 Turns 10X12mm 0.17mm 390 Turns10X12mm 0.17mm 390 Turns XX--cap:cap: 0.022uF + 0.01uF0.022uF + 0.01uF YY--capcap : 470p~1nF: 470p~1nF, Bypass solve common noise, Bypass solve common noise ForFor HighHigh power designpower design Common choke for radiationCommon choke for radiation NiNi--Zn core, 10uHZn core, 10uH--20uH with high impedance 20uH with high impedance বय़఼㒧ᵘ䆒䅵বय़ 㒧ᵘ䆒䅵 বय़఼㒧ᵘᇍEMIঞᬜ⥛ⱘᕅડ 䕀ᤶᬜ⥛䕀ᤶᬜ⥛ ๲໻ ሖ䯈ߚᏗ⬉ᆍ㮩ড়㋏᭄ঞⓣᛳ ๲໻ ϝᯢ⊏㒧ᵘ㛑᳝ᬜᦤ催ᬜ⥛ Ԛᰃ๲ࡴEMI䲒ᑺ EMI • ϝᯢ⊏㒧ᵘ㛑᳝ᬜᦤ催ᬜ⥛,Ԛᰃ๲ࡴEMI䲒ᑺ • LED偅ࡼবय़఼䆒䅵Ёϝᯢ⊏㒧ᵘ䖬ᰃ佪䗝 বय़఼㒧ᵘᇍPSR䆒䅵ⱘᕅડ iW tt߱㑻᥻ࠊᡔᴃ㛑᳔໻䰤ᑺ䙓ܡⓣᛳᇪዄᇍ• iWatt߱㑻᥻ࠊᡔᴃ㛑᳔໻䰤ᑺ䙓ܡⓣᛳᇪዄᇍ ᥻ࠊⱘᕅડ • Vsense/Vcc㒩㒘䴴䖥䕧ߎ㒩㒘㛑᳔དഄẔ⌟䕧 ߎ⢊މ ⬉य़Ẕ⌟⚍⬉य़Ẕ⌟⚍ ߎ⢊މ PCB䆒䅵Пᅝ㾘䎱⾏ CE IEC60598䆒䅵 ᅝ㾘 ⾏_ _ খ✻Ⳍ݇ᷛޚঞখ✻Ⳍ݇ᷛޚঞDEMODEMO䆒䅵䆒䅵 PCB䆒䅵П໻⬉⌕Ϣᇣֵো໘⧚䆒䅵 ໻ Ϣᇣֵো Boost⬉⌕ಲ䏃, ⦃䏃᳔ᇣ࣪ Boostᬒ⬉ಲ䏃, ⦃䏃᳔ᇣ࣪ High frequency, 㡖⚍᳔ᇣ࣪ High frequency, 㡖⚍᳔ᇣ࣪ Fly back䕧ߎ⬉⌕ಲ䏃,⦃䏃᳔ᇣ࣪High frequency, 㡖⚍᳔ᇣ࣪ 催⬉य़㡖⚍ ⊼ᛣ䎱⾏ Vin,䕧ܹ⬉य़ঞⳌԡẔ⌟,䙓ܡᑆ⍝ Fly back߱㑻⬉⌕ಲ䏃,⦃䏃᳔ᇣ࣪ 催⬉य़㡖⚍,⊼ᛣ䎱⾏ Vsense.䕧ߎ⬉य़Ẕ⌟,䖰⾏ᑆ⍝ Fly back߱㑻⬉⌕ಲ䏃,⦃䏃᳔ᇣ࣪ ᥻ࠊֵো,ऩ⚍᥹ഄ 䆺㒚ᑨ⫼䇋খ㗗iWatt demo 䆒䅵 3612ᑨ⫼,ᓔᴎ⌟䆩Ẕᶹ⌕⿟ᑨ⫼,ᓔᴎ⌟䆩Ẕ ⿟ 3612ᑨ⫼,ᐌ㾘Ẕᶹ乍Ⳃᑨ⫼,ᐌ㾘Ẕ 乍Ⳃ Q &A Bob Chen SSL A li ti MSSL Application Manager Bchen@iWatt.com Tel: +86-13714738362 iWattЁ೑ҷ㸼໘ SSL Manger: Bob Chen ⏅ഇᏖफቅऎ催ᮄऎफऎ⾥ᡔफकѠ䏃 iWatt Hong Kong Ltd Sales Director: Marco Cheng U it 223B 2/F C B ildi 2⏅ഇᏖफቅऎ催ᮄऎफऎ⾥ᡔफकѠ䏃 䭓㱍⾥ᡔ໻ॺकὐ1010ऩܗ 䛉䘲औ㰳: 518 057 ⬉䆱˖ +86-755-2981-3669 Ӵⳳ˖ +86-755-8175-1496 Unit 223B, 2/F, Core Building 2 No. 1 Science Park West Avenue Hong Kong Science Park, Shatin New Territories, Hong Kong Tel +852 2111 3903 66 Ӵⳳ˖ +86 755 8175 1496 ᠟ᴎ˖ +86 13714738362 ⬉ᄤ䚂ӊ˖ Bchen@iwatt.com’ Tel: +852-2111-3903 Cell:Cell: +86 (1382) 356 2501