Proiectarea surselor de alimentare: Liniare vs. în comutație

ெࡔࡔॆӷ‫ິࠅ༹ڞ‬ ᆌᆩጀ๥ 556 2002౎9ሆ ᆅჾ ‫ۉ‬ᇸՂႷྜ‫ူׯ‬ଚࠀీǖ ํाฉ௅໼‫ۉ‬ጱยԢǈ૩ස‫ۉ‬సतഄྔยĂऺ໙ഗĂTV ࢅHi-fiยԢĂᅜतᅏഗ‫ۼ‬๟ᆯ኱ୁ‫ۉ‬ᇸࠃ‫ڦۉ‬ǈ኱ୁ‫ۉ‬ᇸ੗ ᅜ๟‫׾ۉ‬ईኁᆶᇸ‫ۉ‬ᇸă‫ܠٷ‬ຕኄૌยԢᄲ൱‫ڦ‬փৈ๟኱ୁ ‫ۉ‬უǈܸ൐๟ঢ়ࡗᆶၳ୳հࢅ࿘უࢫ‫ۉڦ‬უăᅺྺ‫ۉ‬ᇸසُ 1. ኝୁǖॽ๼෇‫ڦ‬঍ୁ၍ୟ‫ۉ‬უገ࣑ྺ኱ୁ‫ۉ‬უă 2. Վუǖ༵ࠃኟඓ‫ڦ‬኱ୁ‫ۉ‬უ‫ۉ‬ೝă 3. ୳հǖೝࣂኝୁࢫ‫ۉڦ‬უ࿖հă 4. ࿘უǖ੦዆๼‫ۉ؜‬უ‫ۉ‬ೝ዁ᅃ߲ࠦۨኵǈᇑ၍ୟĂ ޶ሜࢅ࿒‫ڦڪ܈‬Վࣅ࿮࠲ă ࠽‫ںݘ‬ᆌᆩᇀ‫ۉ‬ጱยԢǈᅜ዁ᇀ‫ۉ‬ᇸഗॲ቞କణമ๘হ‫ۉ‬ጱ ๨‫ׇ‬ዐ‫ܮݻٷ࢔ڦ‬ǈ౎๨‫ࡀׇ‬ఇ‫ࡗג‬50ᅢெᇮă ‫ৃړ‬๑ᆩ‫ۉڦ‬ጱࠀ୲ገ࣑ഗॲࠌᆶෙዖૌ՚ǈӀቷ๼ ෇ࢅ๼‫ۉ؜‬უ৊ႜ‫ݴ‬ૌǖ1ǅ኱ୁ-኱ୁገ࣑ഗǗ2ǅ঍ୁ-኱ ୁ‫ۉ‬ᇸǗ3ǅ኱ୁ-঍ୁొՎഗă௅ᅃૌׂ೗‫ۼ‬ᆶ߳ጲ‫ڦ‬ᆌᆩ ൶ᇘǈ‫ڍ‬Ԩ࿔ৈዘ‫঻ۅ‬ถമଇ߲ૌ՚ǈኄᄺ๟ፌ‫׉‬ᆩ‫ڦ‬ଇૌ ‫ۉ‬ᇸă ᅜߛၳ୲ǈ‫ׯگ‬Ԩ‫ॽں‬঍ୁ၍ୟ‫ۉ‬უገ࣑ྺ኱ୁ‫ۉ‬უǈ ‫ۉ‬ᇸ‫঻ڦ‬ถ ‫ۉ‬ᇸ‫঻ڦ‬ถ 5. ߰૗ǖॽ๼‫؜‬ᇑ๼෇‫ۉ‬უᇸፕ‫ۉ‬ഘ‫ݴ‬૗ă 6. ԍࢺǖ‫ݞ‬ኹਏᆶ೦࣋Ⴀ‫ڦ‬ષᆥ‫ۉ‬უ‫ٳڟ‬๼‫܋؜‬Ǘ༵ ࠃԢ‫ۉݻ‬ᇸईሞവუ೺क़࠲Կ‫ۉ‬ᇸă ᅃ߲૙ၙ‫ۉڦ‬ᇸਏᆶ‫ڦ‬༬Ⴀ๟ǈ࿮ஃ‫ۉ‬უĂ޶ሜ‫ୁۉ‬ई ࣍ৣ࿒‫܈‬සࢆՎࣅǈධᅜ100%‫ڦ‬ၳ୲༵ࠃᅃ߲ೝࣂ൐ࠦۨ‫ڦ‬ ๼‫ۉ؜‬უă཮1 Բডକํा‫ۉ‬ᇸࢅ૙ၙ‫ۉ‬ᇸǈ৊ܸ‫׃‬ຎକᅃၵ ‫ۉ‬ᇸຍᇕă ޶ሜۙኝ୲ ࿖հ‫ۉ‬უ‫ރڦ‬-‫ރ‬ኵ 01006101 ཮1. ํा‫ۉ‬ᇸ၎Բ૙ၙ‫ۉ‬ᇸ໯ਏᆶ‫ڦ‬ဃֶ ‫ړ‬၍Ⴀ‫ۉ‬უ࿘უഗ༵ࠃ৛ඓ‫ڦ‬๼‫ۉ؜‬უ้ǈ໲՗၄‫ڦ‬༬ ၍Ⴀ‫ۉ‬ᇸ ཮2 ‫׃‬ຎକଇ߲‫ړ‬മፌ‫׉‬ᆩ‫ڦ‬၍Ⴀ‫ۉ‬ᇸ‫ۉ‬ୟă໯ᆶ‫ۉ‬ୟ ‫֑ۼ‬ᆩඇհኝୁ঳ࠓઠ३ณ዁‫ۉ‬ඹC1‫ڦ‬࿖հ‫ۉ‬უăൃ๕ኝୁ ഗ‫ۉ‬ୟᆶᅃ߲०‫ڦڇ‬Վუഗǈ‫ୁۉڍ‬ՂႷཚࡗଇ߲ܾट࠶ă ዐक़؏ཀྵ‫ڦ‬ದዃ߸๢ࢇᇀ‫گ‬๼‫ۉ؜‬უǈᅺྺৈᆶᅃ߲ܾट࠶ ‫ۉڦ‬უইă‫ܔ‬ᇀ5Vࢅ12V๼‫؜‬ǈᇑ၎ཞࡀ߭‫੺ڦ‬໏ܾट࠶၎ Բǈᆯᇀၰ༬ए๞ૉܾट࠶ਏᆶড‫ۉڦگ‬უইܸ߸ྺ‫׉‬ᆩǈ ৊ܸ༵ߛକ‫ۉ‬ᇸገ࣑‫ڦ‬ၳ୲ă඗ܸǈ௅߲ܾट࠶ՂႷ‫׶‬๴ଇ Ԡ‫ݒڦ‬ၠ‫ۉ‬უǈ޿‫ۉ‬უྺ၎ཞ๼෇‫ۉ‬უ้ඇհൃ๕ገ࣑ഗ঳ Ⴀᆲසሞ๼෇ࢅ๼‫؜‬ኮक़‫ڦ‬ᅃ߲੗Վ‫ۉ‬ፆă޿‫ۉ‬ୟၳ୲‫ڦ‬၌ ዆ኮᅃǈ৽๟ᆯᇀ၍ႠഗॲՂႷই‫گ‬๼෇ࢅ๼‫؜‬ኮक़‫ۉڦ‬უ ֶăፌዕǈ၍Ⴀഗॲ‫ࡼࠀڦ‬๟(Vi–Vo) x Ioă໚඗ኄၵ‫ۉ‬ᇸਏᆶ Ⴙ‫ܠ‬໯Ⴔ‫ڦ‬༬Ⴀǈዮස०‫ڇ‬ႠĂ‫گ‬๼‫؜‬࿖հĂटॅ‫ڦ‬၍ୟࢅ ޶ሜۙኝ୲Ă‫޶ܔ‬ሜई၍ୟՎࣅ‫੺ڦ‬໏ၚᆌ้क़ࢅ‫گ‬EMIǈ ‫ڍ‬๟໲்ᄺ٪ሞ‫گ‬ၳ୲ࢅ቞ᆩড‫ٷ‬੣क़‫ڦ‬࿚༶ăਸ࠲‫ۉ‬ᇸኟ ሁઠሁ๴‫࣌ڟ‬ᆓǈᅺྺ໲்ྺ঴ਦኄၵవ༶༵ࠃକ߸ࡻ‫ڦ‬ ‫ݛ‬ӄă ࠓዐ‫ܾ߲ڇ‬ट࠶‫ۉ‬უ‫ڦ‬ଇԠă AN-556 © 2002 National Semiconductor Corporation AN010061 www.national.com AN-556 ၍Ⴀ‫ۉ‬ᇸǄჄǅ ၍Ⴀ࿘უഗ ၍Ⴀ࿘უഗ 01006102 aǊᆶዐक़؏ཀྵ‫ڦ‬Վუഗ๼෇ 01006105 bǊඇհൃ๕๼෇ ཮2. ၍Ⴀ‫ۉ‬უ࿘უഗ ਸ࠲‫ۉ‬ᇸᇑ၍Ⴀ‫ۉ‬ᇸ‫ڦ‬Բড ኱ୁ-኱ୁገ࣑ഗ ᆯᇀߛၳ୲ࢅߛࠀ୲௢‫ڦ܈‬ᆫ‫ۅ‬ǈਸ࠲‫ۉ‬ᇸሁઠሁ๴‫ڟ‬ ࠽‫ݘ‬๑ᆩ኱ୁ-኱ୁገ࣑ഗઠ‫ܔ‬ဣཥࢅᅏഗዐ‫ڦ‬኱ୁ‫ۉ‬ᇸ ࣌ᆓă՗1 ॽ၍Ⴀ࿘უഗࢅਸ࠲࿘უഗ‫ڦ‬ᅃၵዷᄲ༬Ⴀፔକ ৊ႜገ࣑ࢅ‫ݴ‬ದă኱ୁ‫ۉ‬ᇸཚ‫׉‬ᅜဣཥ‫ۉ‬ᇸईኁ‫ڦ׾ۉ‬ႚ๕ Բডă၍Ⴀ࿘უഗ‫ڦ‬၍ୟࢅ޶ሜۙኝ୲ཚ‫׉‬ᄲᆫᇀਸ࠲࿘უ ྺᆌᆩဣཥࠃ‫ۉ‬ăཚ‫׉‬๟5VĂ28VĂ48Vईኁഄ໲‫ڦ‬኱ୁ‫ۉ‬ ഗǈۙኝ୲‫܈ޗ‬ᆶ้ࣷ‫گ‬ᅃ߲ຕଉपă‫ڍ‬ਸ࠲࿘უഗཚ‫׉‬๑ ᇸ‫ۉ‬უăူଚ໯ᆶ‫ۉ‬ୟ‫ۼ‬๢ᆩᇀ޿ૌᆌᆩǈᅺྺ๟‫ۉگ‬უǈ ᆩ၍Ⴀᇨ࿘უഗઠ߀฀ഄ๼‫؜‬࿘უă ཚ‫׉‬փᄲ൱߰૗ă ՗1. ၍Ⴀ‫ۉ‬ᇸࢅਸ࠲‫ۉ‬ᇸ‫ڦ‬ԲডǄ‫ۆ‬႙ኵǅ ࡀ߭ ၍Ⴀ‫ۉ‬ᇸ ਸ࠲‫ۉ‬ᇸ ၍ୟۙኝ୲ 0.02%–0.05% 0.05%–0.1% ޶ሜۙኝ୲ 0.02%–0.1% 0.1%–1.0% ๼‫؜‬࿖հ 0.5 mV–2 mV RMS 10 mV–100 mVP-P Ġ10% Ġ20% ๼෇‫ۉ‬უ‫ྷݔ‬ ၳ୲ 40%–55% 60%–95% ࠀ୲௢‫܈‬ 0.5 W/cu. in. 2W–10W/cu. in. ຨༀ࣬ް 50 zs 300 zs ԍ‫้׼‬क़ 2 ms 34 ms 4 ǅǈᅺྺӀࠅ๕Ǆ1ǅ ߴ‫ڦ؜‬๼‫ۉ؜‬უၭᇀ๼෇‫ۉ‬უǈ໯ᅜ ਸ࠲‫ۉ‬ᇸ ᄺԥ‫׬‬ፕইუ࿘უഗă‫ۆ‬႙‫ڦ‬ᆌᆩ๟ॽՔጚ‫ڦ‬28Vਬ๚ጺ၍ ஞ؋੻‫ۙ܈‬዆ ‫ۉ‬უই‫ྺگ‬5VǈྺTTLஇडࠃ‫ۉ‬ă ራሞฉ๘ु60౎‫پ‬ራ೺ǈᅙঢ়ਸ๔ยऺᆩᇀਬ๚ᆩ཰‫ڦ‬ ሞ཮4 ዐ้क़t (o)‫ت‬ǈ੦዆ഗᅙঢ়ॠ֪‫ڟ‬๼‫ۉ؜‬უV o‫׉ݥ‬ ਸ࠲࿘უഗǈᅺྺഄሞዘଉൟേࢅၳ୲ਏᆶ௽၂ᆫ๞ăᆩ੦ ‫گ‬ǈਸഔۙኝ࠶ᅜॺ૬Lዐ‫ୁۉڦ‬ǈ޿‫ୁۉ‬૬ਗ਼ྺ‫ۉ‬ඹCዘ ዆޶ሜೝ਩ࠀ୲‫݆ݛڦ‬ઠ੦዆޶ሜฉ‫ڦ‬ೝ਩‫ۉ‬უăํ၄‫ݛڦ‬ ႎ؊‫ۉ‬ăሞV o‫ڦ‬ᇨۨ‫ۉ‬ೝ‫ت‬ǈ੦዆ഗ࠲Կۙኝ࠶Qǈഽ዆ᆯ ݆৽๟ᅜट੺‫ڦ‬໏‫܈‬৊ႜਸ࠲ൎ࣑ǈස཮3 ໯๖ă LĂCࢅ੺໏ܾट࠶ࠓ‫ڦׯ‬ཚୟჄୁăᆯُߛၳ‫ئॽں‬٪ሞ‫ۉ‬ ޶ሜ‫ۉ‬ፆRฉ‫ڦ‬ೝ਩‫ۉ‬უ‫ڪ‬ᇀǖ Vo(avg) Ǚ (t(on)/T) x Vi ߌLዐ‫ీڦ‬ଉ‫د‬๼‫ۉڟ‬ඹዐă‫ۉࢅߌۉ‬ඹᅜत‫ۉ‬ඹ؅٫‫ۼ‬ᇑ (1) ਸ࠲ೕ୲‫ݒׯ‬Բǈኄ੗঴๥ྺࢆਸ࠲‫ۉ‬ᇸ‫୲ࠀڦ‬௢‫ࣷ܈‬փ܏ ३ณt(on)੗ᅜই‫گ‬Vo(avg)ă޿੦዆‫݆ݛ‬ԥ‫׬‬ኮྺஞ؋੻‫ۙ܈‬ ሺेăᆯᇀࠀ୲MOSFET‫ߛڦ‬ೕႠీǈ໯ᅜ໲ኟტ໏‫ں‬ሞۙ ዆ǄPWMǅă ኝ࠶࿋ዃൽ‫پ‬ມटႠৗ༹࠶ăᅺྺۙኝ࠶փৈᄲ‫׶‬ሜ޶ሜ‫ۉ‬ ইუ࿘უഗ ୁǈܸ൐ᄲ‫׶‬ሜܾट࠶D‫ݒڦ‬ၠ࣬ް‫ୁۉ‬ǈ໯ᅜഽ዆๑ᆩᅃ ኟස࿢்໯९ǈ٪ሞႹ‫ܠ‬փཞ‫ڦ‬ਸ࠲‫ۉ‬უ࿘უഗยऺ ߲‫ܾް࣬੺ג‬ट࠶ईኁၰ༬एܾट࠶ă ‫݆ݛ‬ăᅺྺ঳ࠓ०‫ڇ‬ǈ໯ᅜ๯ံ༪ஃĐူ؋đ႙࿘უഗǄ཮ www.national.com 2 AN-556 ਸ࠲‫ۉ‬ᇸǄჄǅ 01006103 ཮3. ஞ؋੻‫ۙ܈‬዆‫ํڦ‬૩ 01006104 ཮4. ইუ႙࿘უഗतഄ‫ۉ‬უࢅ‫ୁۉ‬հႚ ้࠲Կǈ‫ୁۉߌۉ‬ტ໏ฉืăሞtime (1)้ৗ༹࠶࠲Կࣷഽ዆ ืუ႙࿘უഗ ස཮5 ໯๖‫ܾڼڦ‬ዖૌ႙࿘უഗీࠕ༵ߛ๼෇‫ۉ‬უăᆌᆩ ‫ୁۉߌۉ‬ཚࡗ‫੺ג‬໏ܾट࠶Dઠྺ‫ۉ‬ඹ؊‫ۉ‬ăᅺྺ٪‫ئ‬ሞ‫ۉ‬ ޿‫ۉ‬ୟ੗ॽ5V‫ۉ׾ۉڦ‬უืߛ዁থ੨‫ۉ‬ୟ‫ڦ‬12Vǈईฯ዁ߛ ߌዐ‫ీڦ‬ଉ‫ڪ‬ᇀLġIġ½ǈཚࡗሺेPWMႊೌጲว‫ڞڦ‬ཚ้ ‫ۉٳ‬ጱ݀࠼၂๖‫ۉ‬ୟႴᄲ‫ڦ‬150Vă क़ǈܸٗሞൎ࣑മሺे‫ރڦߌۉ‬ኵ‫ୁۉ‬੗ᅜሺेPWMႊೌ‫ڦ‬ Voă‫د‬๼ࡧຕྺǖ ޿‫ۉ‬ୟ‫ڦ‬ᇱ૙ཞኮമ‫ڦ‬ᅃᄣǈॽ٪‫ئ‬ሞ‫ߌۉ‬ዐ‫ీڦ‬ଉദ Vo Ǚ VIN(T/(Tǉt(on))) ᅎ‫ۉڟ‬ඹฉăᆯᇀแे஢‫ޗ‬๼෇‫ۉ‬უǈ‫ڞ‬ዂৗ༹࠶ਸ࠲ሞt(0) (2) 01006106 ཮5. ืუ႙࿘უഗࢅ࠲૴‫ڦ‬I/Vհႚ 3 www.national.com AN-556 ‫ݒ‬घገ࣑ഗ ਸ࠲‫ۉ‬ᇸǄჄǅ ኮമ༪ஃ‫ڦ‬ෙዖ࿘უഗ๢ࢇᇀ࿮Ⴔ‫ۉ‬ഘ߰૗‫گڦ‬უ੦ ‫ݒ‬၎࿘უഗ ዆ǈ඗ܸǈሞᇑ110V/220Vዷ‫ۉ‬ᇸፕ૗၍ਸ࠲߾ፕ้ǈ‫ۉ‬ഘ ཮6 ྺᅃ߲ਸ࠲‫ۉ‬ୟǈీࠕׂิᇑ๼෇‫ۉ‬უटႠ၎‫ڦݒ‬๼ ߰૗๟ਨ‫ܔ‬Ղᄲ‫ڦ‬ăኄ੗ᆩᅃ߲Վუഗ‫ߌۉ༺پ‬ઠํ၄ăස ‫ۉ؜‬უă޿‫ۉ‬ୟ‫߾ڦ‬ፕᇱ૙ᇑืუ႙࿘უഗ၎ཞǈኻ๟ཚࡗ ཮7 ໯๖‫ݒڦ‬घገ࣑ഗཚ‫׉‬ᆩᇀߛ‫ٳ‬150W‫ۉڦ‬ᇸዐǈ੗ᅜ஢ Վ࣑ৗ༹࠶ࢅ‫ڦߌۉ‬࿋ዃઠํ၄‫ۉ‬უटႠ‫ڛڦ‬ዃă޿‫ۉ‬ୟᄺ ፁ‫ܠٷ‬ຕ‫߲ڦ‬ට‫ۉ‬సĂႹ‫֪ܠ‬๬ᅏഗࢅ๫ೕዕ‫ڦڪ܋‬ᄲ൱ă ԥ‫׬‬ፕ๟ইუ-ืუ႙࿘უഗǈᅺྺഄ๼‫ۉ؜‬უ‫ڦ‬ਨ‫܈ޗܔ‬੗ ᅺྺՎუഗሞߛೕူ߾ፕǈഄ؅٫ᄲᇺၭᇀස཮2 ໯๖‫ڦ‬ ᅜߛᇀईኁ‫گ‬ᇀ๼෇‫ۉ‬უǈ‫܈ޗ‬ൽਦᇀۙኝ࠶‫ڞڦ‬ཚ้क़ᇑ 50 Hz/60 HzՎუഗăሞ၌዆‫ڦ‬༬ۨೕ୲‫ాྷݔ‬ǈՎუഗ؅٫ পኹ้क़ኮक़‫ڦ‬Բኵă ᇑೕ୲‫ݒׯ‬Բă ॠֱ཮7 ໯๖‫ڦ‬ਸ࠲հႚǈ‫ۉ‬ୟ՗၄‫ڦ‬༬Ⴀᇑืუ႙࿘ უഗटྺ၎ຼăᆌॽՎუഗੂፕ๟ᆯଇ߲ජፇࠓ‫ڦׯ‬ᅃ߲‫ۉ‬ ߌǈᅃ߲ජፇᆩᇀॽీଉ٪‫ئ‬ሞՎუഗཎႊዐǈଷᅃ߲ᆩᇀ ॽཎႊీଉ‫د‬๼‫ڟ‬๼‫ۉ؜‬ඹዐăሞৗ༹࠶‫ڞڦ‬ཚ้क़(t(0)ǉt(1)) ాǈՎუഗዷ၍ංዐ‫ୁۉڦ‬ሺेǈ൩ጀᅪǈᅺྺْप၍ං‫ۉ‬ უ‫ݒ‬၎ೋዃܾट࠶Dǈ໯ᅜْप၍ංዐ࿮‫ࡗୁୁۉ‬ă‫ړ‬ৗ༹ ࠶࠲Կ้ǈՎუഗ‫ۉ‬უटႠ‫ڛ‬ዃǈᅺྺ໲‫ׇىڦ‬ᄲ൱ीჄྼ ‫׼‬ᇱံ‫ݛୁۉڦ‬ၠăْप၍ංዐ‫ୁۉڦ‬ঢ়ࡗܾट࠶ྺ๼‫ۉ؜‬ 01006107 ඹ؊‫ۉ‬ă๼‫ۉ؜‬უཚࡗएԨPWMࠅ๕‫ױ‬ᅜՎუഗ၍ංሕԲ ཮6. ‫ݒ‬၎࿘უഗ ǄN2/N1ǅ‫؜ڥ‬ǖ VoǙVIN x (t(on))/(Tǉt(on)) x (N2/N1) (3) ཚࡗ੦዆ৗ༹࠶‫ڞڦ‬ཚ้क़ઠ੦዆ዷ၍ං‫ރڦ‬ኵ‫ୁۉ‬ǈ ܸٗํ၄‫ۉ‬უ੦዆ă 01006108 ཮7. ‫ݒ‬घገ࣑ഗ ‫ݒ‬घገ࣑ഗፌ๢ࢇᇀ‫ܠ‬ୟ๼‫ߛࢅ؜‬უ‫ۉ‬ᇸǈᅺྺՎუഗ ૗၍ਸ࠲‫ۉ‬ᇸ एᇀ‫ݒ‬घ࿘უഗ‫ۉ‬ୟ‫ྜڦ‬ኝ૗၍ਸ࠲‫ۉ‬ᇸස཮8 ໯๖ă‫ۉ‬ ‫پ༺ߌۉ‬କ୳հഗ‫ߌۉ‬ă၌዆ഄᆌᆩᇀড‫ۉ୲ࠀگ‬ᇸ‫ڦ‬ዷᄲ ᇸኮ໯ᅜԥ‫׬‬ኮྺĐ૗၍đǈ๟ᅺྺໃ‫ڟ‬ਸ࠲‫ڦ‬኱ୁ‫ۉ‬უ๟ ඍ‫ۅ‬๟ǖ 1. ٗ঍ୁ၍ୟՎ࣑ܸઠă ᅺྺ๼‫ۉ؜‬ඹ‫ڦ‬ӷհ؊‫ײࡗۉ‬ǈ๼‫؜‬࿖հ‫ۉ‬უԲ ‫ۉ‬ୟᄺຫ௽କٗ๼‫؜‬ች࣮‫ڟ‬ਸ࠲ৗ༹࠶ႚ‫ׯ‬କᅃ߲ྜኝ ডߛă 2. ৗ༹࠶ՂႷሞਸ࠲೺क़‫׶‬๴2ġVIN‫ۉڦ‬უă ‫ݒڦ‬ઍ࣍ୟă‫ݒ‬ઍ࣍ୟՂႷਏᆶ߰૗ǈܸٗॽ኱ୁ๼‫ۉ؜‬უ 3. ᅺྺৈሞᅃ߲‫ݛ‬ၠൻ‫ۯ‬Վუഗǈ๑‫ڥ‬ሞ‫ݒ‬घยऺዐ ᇑ঍ୁ၍ୟ߰૗ăཚ‫׉‬ཚࡗᅃ߲ၭՎუഗईኁ࠼᳘ࢇഗઠํ ᄲ֑ᆩᅃ߲Բኟघईླྀྞ๕ยऺড‫ڦٷ‬ཎႊǈኄᄺ ၄߰૗ă ࣷሺे‫ׯ‬Ԩă www.national.com 4 AN-556 ਸ࠲‫ۉ‬ᇸǄჄǅ 01006109 ཮8. ྜኝ‫߰ڦ‬૗‫ݒ‬घਸ࠲‫ۉ‬ᇸ ྺ࠽‫ݘ‬ᆩ཰ܸยऺਸ݀‫ڦ‬ਸ࠲‫ۉ‬ᇸՂႷ஢ፁٗ115V዁ ኟघገ࣑ഗ 230V‫ڦ‬੗჋঍ୁ๼෇‫ۉ‬უ‫ྷݔ‬ă཮9 ໯๖ྺႹ‫ܠ‬ਸ࠲‫ۉ‬ᇸํ ৑࠶ኟघገ࣑ഗժփၟ‫ݒ‬घገ࣑ഗఫ஺ྺටຄኪǈ‫ڍ‬ᄺ ኟደॷ‫ں‬ᆌᆩሞ100W዁500W‫ۉڦྷݔ‬ᇸዐă཮10 ྺኟघገ ၄ኄᅃᄲ൱‫ڦ‬ยऺă ࣑ഗ‫ڦ‬एԨ‫ۉ‬ୟă‫ړ‬ৗ༹࠶‫ڞ‬ཚ้ǈዷ၍ංዐ‫ୁۉڦ‬၍Ⴀฉ ืǈْप၍ං‫ୁۉڦ‬ᄺཚࡗܾट࠶D1ୁ‫ۉࢅߌۉڟ‬ඹዐă‫ړ‬ ৗ༹࠶ਸ࠲܏ਸ้ǈ‫ୁۉߌۉ‬ཚࡗ‫ۉ‬ඹࢅܾट࠶D2Ⴤୁăᅺ ྺ‫ۉܔ‬ඹ‫׼‬Ⴤ؊‫ۉ‬ǈ޿ገ࣑ഗׂิডณ‫ڦ‬࿖հăሞ‫ۉୁۉٷ‬ ᇸዐኄᄺ๟༬՚ኵ‫࠲ڥ‬ጀ‫ڦ‬ᆫ๞ă ޿‫ۉ‬ୟ‫ڦ‬๼෇ࢅ๼‫ۉ؜‬უኮक़‫࠲ڦ‬ဣ๕ྺǖ Vo Ǚ VIN x (N2/N1) x (t(on)/T) (4) ൩ጀᅪฉ཮໯๖‫ڦ‬Վუഗਏᆶ‫ڼ‬ෙ߲ජፆࢅ‫ܾ૴ز‬ट࠶ 01006110 D3ăยዃ޿ජፆ‫ڦ‬ణ‫ڦ‬ሞᇀॽՎუഗཎႊዐ‫ీىۉڦ‬ଉ‫࣮ݓ‬ ‫ڟ‬኱ୁ‫ۉ‬ᇸǈ໯ᅜփࣷሞৗ༹࠶ਸ࠲ईഄ໲‫ۉ‬უᅞ዆ഗዐׂ ཮9. ჋ስ115V/230V๼෇‫ۉ‬უ‫ڦ‬ਸ࠲ ิࠀࡼă၍ංሕԲN3/N1၌዆କৗ༹࠶ฉ‫ރڦ‬ኵ‫ۉ‬უǈཚ‫׉‬ ჋ስ‫ڪ‬ᇀ1ǈ๑‫ڥ‬ኟघገ࣑ഗ߾ፕሞ50%‫ڦ‬቞੣Բăሞኄዖཉ ॲူǈৗ༹࠶ሞ࠲Կ೺क़ՂႷ‫׶‬๴2ġVIN‫ۉڦ‬უă 5 www.national.com AN-556 ਸ࠲‫ۉ‬ᇸǄჄǅ 01006111 ཮10. ኟघገ࣑ഗ Vo Ǚ 2 x VIN x (N2/N1) x (t(on)/T) ‫׬ܔ‬ገ࣑ഗ (5) Ⴔᄲ٪ሞຶ൶้क़܎t(d)ઠՆ௨ሞଇ߲ৗ༹࠶ሞ၎ཞ้क़ ླྀྞ๕ገ࣑ഗ ా‫ڞ‬ཚǈኄ၎‫ړ‬ᇀՆ௨ॽৗ༹࠶৊෇‫܌ڟ‬ୟఇ๕ዐă๼‫؜‬࿖ ኄዖ࠽‫ݘ‬ᆌᆩ‫ڦ‬ገ࣑ഗ‫ۉ‬ୟස཮11 ໯๖ă հೕ୲๟߾ፕೕ୲‫ڦ‬ଇԠǈኄࣷ३ၭLC୳հഗᇮॲ؅٫ă൩ ৗ༹࠶Q1ࢅQ2୾ୁ‫ڞ‬ཚǈ‫ڞ‬ཚ้क़ྺt(on)ă๑‫ڥ‬Վუഗ ጀᅪܾट࠶‫ݒ‬ၠժ૴ሞ௅߲ৗ༹࠶ฉă໲்ཞኟघገ࣑ഗዐ ၍ං୾࣑߀Վഄ‫ۉ‬უटႠǈഄ૧ᆩ୲‫ڟٳ‬ፌ‫ٷ‬ă‫د‬๼ࡧຕධ ‫ܾڦ‬ट࠶D3ኴႜ၎ཞ‫ీࠀڦ‬ǈनᅃ‫ڋ‬ৗ༹࠶࠲Կ้नॽ‫ىۉ‬ ፏთएԨ‫ڦ‬PWMࠅ๕ǈ‫ڍ‬๟ሺे2Ԡᅺጱǈኄ๟ᅺྺሞኝ߲ ీଉ‫ݓ‬ໃ዁๼෇‫ۉ‬ᇸă ਸ࠲ዜ೺ాଇ߲ৗ༹࠶୾ୁ‫ڞ‬ཚև‫้ݴ‬क़ă 01006112 ཮11. ླྀྞ๕ገ࣑ഗ Բডူଚ‫׬ܔ‬ገ࣑ഗǈ޿‫ۉ‬ୟ‫ڦ‬ᆫ‫ۅ‬๟ଇ߲ৗ༹࠶ਸ࠲ ӷൃገ࣑ഗ ޿ገ࣑ഗǄ཮12 ǅ‫߾ڦ‬ፕ‫ݛ‬๕ཞံമ‫ྞླྀڦ‬๕‫ۉ‬ୟबࢭ ࠌၛᅃ߲ࠅᆩ႑ࡽ࣮ୟă໲‫ڦ‬ዷᄲඍ‫ۅ‬๟Վუഗዐक़؏ཀྵ૶ ၎ཞă থ๑‫ڥ‬Վუഗยऺްሗࣅǈᄲॽዷජፇፕ৆᳘ࢇยऺǈᅜՆ ௨ৗ༹࠶࠲Կ้‫؜‬၄ॖ‫ރ‬ஞ؋‫ۉ‬უă www.national.com 6 ‫ۉ‬ᇸ‫঻ڦ‬ถ ‫׬ܔ‬ገ࣑ഗǄჄǅ ๼෇‫ۉ‬ඹC1ࢅC2ࣷೝ‫ߪݴںڪ‬๼෇‫ۉ‬უǈ໯ᅜ‫ړ‬ඪࢆᅃ ߲ৗ༹࠶ਸഔ้ǈ‫ࣷۼ‬ሞՎუഗዷ၍ංฉ‫ڟڥ‬VIN/2‫ۉڦ‬უă ᅺُጀᅪ‫ڟ‬ሞူଚ‫د‬๼‫ڪ‬๕ዐժுᆶᅺጱĐ2đă VoǙVIN x (N2/N1) x (t(on)/T) (6) ᅺྺଇ߲ৗ༹࠶๟‫ڦ૴ز‬ǈഄฉแे‫ۉڦ‬უփࣷ‫ࡗג‬๼ ෇‫ۉ‬უVINेฉ࿮݆Ն௨‫ڦ‬ਸ࠲ຨༀ‫ۉ‬უăᆯᇀଇ߲ৗ༹࠶ཞ ้‫ڞ‬ཚࣷ‫ڞ‬ዂ๼෇‫ۉ‬ᇸ‫ڦ‬ჹዘ‫܌‬ୟǈ໯ᅜُ‫ت‬٪ሞຶ൶้क़ ‫ڦ‬ՂᄲႠ၂ܸᅟ९ă‫ݒ‬ၠժ૴‫੺ڦ‬໏ܾट࠶‫ీىۉ࣮ݓ‬ଉǈ සཞሞླྀྞ‫ۉ‬ୟዐ‫ڦ‬ᅃᄣǈኻ๟ሞُ୾ୁ‫ۉڟ࣮ݓ‬ඹC1ࢅ C2ă୼ߌփՍ‫ڦ‬๟޿‫ۉ‬ୟዐႴᄲᅃ߲ਨᇹቆൻ‫ۯ‬ഗQ1ǈᅺྺ Ⴙ‫ํܠ‬ा‫ڦ‬ቆटൻ‫ۉۯ‬ୟ‫ۼ‬๑ᆩՎუഗઠ৊ႜ߰૗ǈ໯ᅜփ 01006113 Ղੂዘ޿ඍ‫ۅ‬ă ཮12. ӷൃገ࣑ഗ‫ۉ‬ୟ ඇൃገ࣑ഗ ᆯᇀഄްሗႠࢅߛ‫ׯ‬Ԩǈ཮13 ‫ڦ‬ඇൃገ࣑ഗ‫ۉ‬ୟዷᄲᆩ ᇀߛࠀ୲ገ࣑ഗዐă૙ၙ൧઄ူǈଇ߲ৗ༹࠶‫ݴڪ‬໯ᆶ‫ۉڦ‬ უǈ໯ᅜഗॲፌ‫ۉڦٷ‬უ‫ۨܮ‬ኵీথৎVINă 01006114 ཮13. ඇൃገ࣑ഗ‫ۉ‬ୟ ‫ܔ‬ᇀฉຎඪࢆ‫ۉ‬ୟ‫ڦ‬๑ᆩǈெࡔࡔॆӷ‫ິࠅ༹ڞ‬փ‫څ׶‬ඪࢆሴඪ൐փఐ๖ඪࢆ‫ۉ‬ୟጆ૧Ⴙ੗ăெࡔࡔॆӷ‫ິࠅ༹ڞ‬ԍାໜ้߸߀ฉຎ‫ۉ‬ ୟࢅࡀ߭‫ڦ‬඄૧ǈທփଷႜཚኪă ၙକ঴ፌႎ‫ׂڦ‬೗႑တǈ൩‫ݡ‬࿚࿢்‫ྪڦ‬኷ǖwww.national.comă ิంኧ‫୼֧׼‬ ࿄ঢ়ெࡔࡔॆӷ‫ڦິࠅ༹ڞ‬ጺ֋ࢅ๯ဝୱ฾‫ڦ‬௽ඓກ௬อ಼ǈփ‫ॽڥ‬ெࡔࡔॆӷ‫ׂڦິࠅ༹ڞ‬೗ፕྺิంኧ‫׼‬ยԢईဣཥዐ‫࠲ڦ‬॰ևॲ ๑ᆩă༬ُຫ௽ǖ 1. ิంኧ‫׼‬ยԢ/ဣཥኸǖǄ aǅ‫ٶ‬໙ཚࡗྔ੔๮ຍᅎኲ‫ڦా༹ڟ‬ ิంኧ‫׼‬ยԢईဣཥǗǄ bǅኧ‫׼‬ईྼ‫ิ׼‬ంǈᅈቷ๑ᆩຫ௽ ກኟඓ๑ᆩ้ǈᆶ૙ᆯණྺഄ฿ၳࣷሰ‫ׯ‬ᆩࢽჹዘฅ࡞ă 2. ࠲॰ևॲ๟ሞิంኧ‫׼‬ยԢईဣཥዐǈᆶ૙ᆯණྺഄ฿ၳࣷ ሰ‫ิׯ‬ంኧ‫׼‬ยԢ/ဣཥ฿ၳǈईᆖၚิంኧ‫׼‬ยԢ/ဣཥ‫ڦ‬ ҾඇႠईၳ૰‫ڦ‬ඪࢆևॲă ্ᆩ࿿ዊࢇࡀ ெࡔࡔॆӷ‫ິࠅ༹ڞ‬዆ሰ‫ׂڦ‬೗ࢅ๑ᆩ‫ڦ‬Ԉጎ֌ଙ‫ࢇޙ‬Ėၩ‫ׂݯ‬೗࠶૙ࡀ‫ݔ‬ǄCSP-9-111C2ǅėᅜतĖ၎࠲্ᆩ࿿ዊࢅ֌ଙࡀ‫ݔ‬ ǄCSP-9-111S2ǅė‫ڦ‬ཉ੼ǈփԈࡤCSP-9-111S2၌ۨ‫ڦ‬ඪࢆĐ্ᆩ࿿ዊđă ࿮തׂ೗‫ࢇޙ‬RoHSኸସă National Semiconductor Europe Customer Support Center Fax: +49 (0) 180-530 85 86 Email: europe.support@nsc.com Deutsch Tel: +49 (0) 69 9508 6208 English Tel: +44 (0) 870 24 0 2171 Français Tel: +33 (0) 1 41 91 8790 National Semiconductor Asia Paciﬁc Customer Support Center Email: ap.support@nsc.com National Semiconductor Japan Customer Support Center Fax: 81-3-5639-7507 Email: jpn.feedback@nsc.com Tel: 81-3-5639-7560 www.national.com AN-556 National Semiconductor Americas Customer Support Center Email: new.feedback@nsc.com Tel: 1-800-272-9959

Proiectarea surselor de alimentare: Liniare vs. în comutație

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