AN-892 ᆌᆩԴऻ One Technology Way t P.O. Box 9106 t Norwood, MA 02062-9106, U.S.A. t Tel: 781.329.4700 t Fax: 781.461.3113 t www.analog.com ࿒֪܈ଉᇱतํᆩरຍ ፕኁǖDonal McNamara ඤڿدஃ ඤଉڿدڦཚٗߛ࿒༹گڟ࿒༹ăཚࡗഽဣཥ (සգၒ)ႜీଉڿدLjඤଉᅜٗૐڦ൶ᇘڟڿدඤڦ ൶ᇘă WARM AIR RISES t ڞد t ୁܔ t ޖพ 06506-002 COOLER AIR DROPS AND REPLACES THE WARMER AIR ඤڿدᅜཚࡗෙዖएԨํ݆ݛ၄ă HEATER ڞد 2. ୁܔ ڞدፌ९༹ࠦڦඤݛڿد๕ăٗྲ࠵ঙੂ܈Ljڞد ኸघଜĂᅎۯईናڦۯᇱጱࢅݴጱᇑତৎڦᇱጱࢅݴ ጱ၎ࢻፕᆩLjॽ்ڦᅃևీݴଉ(ඤଉ)ߴڿدኄၵ၎ତ ڦᇱጱă CROSS SECTIONAL AREA = A ޖพྸᅃփႴᄲඪࢆዊڦඤڿدႚ๕Ljᄺཚࡗኈ ႜඤྸڦڿدᅃݛ๕ăඤޖพଙዐڦᇱጱࢅݴጱሏ ڦۯথࡕăᆯᇀޖพଉໜጣ࿒ܸߛืڦ܈ሺेLjኄᄣ ৽ׂࣷิٗডߛ࿒ڟ܈ডگ࿒ڦ܈৫ీଉڿدă COLD HEAT FLOW L 06506-001 HOT ޖพ 1. ڞد ୁܔ ेฉᆯڞدᆅഐڦඤڿدLjࠌཞᆅഐକୁܔዐڦඤଉد ڿă Rev. 0 | Page 1 of 8 06506-003 ୁܔཚᅂ༹ࢅഘ༹ඤڦڿدዷᄲႚ๕ăُຍᇕᆩᇀ௮ ຎڞدᇑୁ༹ୁڦۯፇࢇၳᆌăୁ༹ዐඤईૐڦݴׯሏ ۯLj 3. ޖพ AN-892 ణ ඤڿدஃ ...................................................................................... 1 ᆩᇀ֪ଉPCB࿒ڦ܈ኟඓPCBքਆ ..................................... 4 ᆩᇀ֪ଉ࣍ৣ࿒ڦ܈ኟඓPCBքਆ ..................................... 5 ހጎ ............................................................................................ 6 Rev. 0 | Page 2 of 8 AN-892 ๚ํǖڞدPCBዐፌՓڦඤ݆ݛڿد සࡕPCBڦᅃ܋࿒܈ডߛLjీଉࣷၠPCB࿒܈ডڦگᅃ܋ ڿدăߛ૭ጱಸጐگ૭ጱ้Ljࣷᇑگ૭ጱ݀ิ৫ీ ଉڿدăدڦڞدඤ୲ǖ H ഄዐǖ H = ڇ࿋้क़ీڦڞدଉ(ঋܺ/௱) K = ࿒ူཟڦඤڞدဣຕ8Nt, A = PCBฉཟڦ௬ओ T = ࿒܈ L = ඤڦ༹ᇑૐڦ༹ኮक़ڦਐ 06506-004 A T 4. دڦڞدඤ୲ ཟटࡻڞڦඤ༹LjᅺُሞܠPCBยऺዐᆩᇀඤᇸڦො ඤăᆀࢅূߑ็ৈᆶڦଇ߲ਏᆶ߸ࡻඤڞدဣຕڦଙ (९1)ă 1. ଙڦඤڞدဣຕ 4၂๖Ljසࡕඤڦ༹ᇑૐڦ༹ኮक़ڞඤዊ)සཟ*ڦ ௬ओሺेLjఫඤଉ߸ࣷڿدăཞᄣںLjසࡕཟڦ௬ओ ३ၭLjدඤ୲ᄺࣷ३ၭăཚࡗ๎ᅜླྀLjଇ༹߲ਐ ሁᇺLjૐڦ༹ՎඤႴ้ڦक़৽ሁă ଙ ূߑ็ ᆀ ཟ ূ Rev. 0 | Page 3 of 8 ඤڞدဣຕ (WNtK) 1000 to 2600 406 385 320 AN-892 ᆩᇀ֪ଉPCB࿒ڦ܈ኟඓPCBքਆ PCBඤଉڦ60%65%ཚࡗᆅগڟڿدႊೌඤߌدഗăGNDᆅগথڟएӱLjᅺُLjGNDᆅগᇑ࿒ߌد܈ഗࢅඤᇸኮक़ڦඤ ፆፌၭ)ස5*ă MAIN HEAT SOURCE (μCONTROLLER) 06506-005 TEMPERATURE SENSOR ֪ଉPCB࿒ڦ܈ኟඓքਆ ᆶၳ֪ଉPCB࿒ڦ܈रേ ස6๖Lj๑ᆩසူरേᅜඓԍ࿒ߌد܈ഗీࠕ߶ጷժඓ֪ଉPCB࿒ࢅ܈ዷᄲڦඤᇸă t ࿒ߌد܈ഗࢅඤᇸᄲࠌᆩཞᅃ߲GNDೝ௬ă t ඓԍ࿒ߌد܈ഗᆶڦGNDᆅগۼᇑඤᇸڦGNDೝ௬၎ă t ሞPCBฉLj࿒ߌد܈ഗᇑඤᇸᆌీ၎ࢻ੍ৎă 28.0 27.5 MAIN HEAT SOURCE (μCONTROLLER) TEMPERATURE SENSOR TEMPERATURE (°C) 27.0 26.5 26.0 25.5 25.0 24.0 TIME (Minutes) 06506-006 24.5 ຕጴ࿒ߌد܈ഗඓ߶ںጷඤᇸڦ࿒܈ ܠٷຕਜ਼ࢽထྭ๑ᆩIC࿒ߌد܈ഗઠ֪ଉPCBईኁഗॲڦ࿒܈ăᅺُLjፌࡻ๑ᆩ5ࢅ6ዐ๖ڦPCBքਆ݆ݛă Rev. 0 | Page 4 of 8 AN-892 ᆩᇀ֪ଉ࣍ৣ࿒ڦ܈ኟඓPCBքਆ ܠยऺኁփႴᄲ֪ଉPCBڦ࿒܈Lj்ኻၙ֪ଉ࣍ৣ࿒܈ă࿚༶LjยऺኁසࢆݞኹPCBฉڦඤᇸᆖၚ࿒ߌد܈ഗৣ࣍ܔ ࿒֪ڦ܈ଉǛ๑ᆩස7๖ڦPCBքਆยऺLj࿚༶৽ీᆓඬܸă SOLID GND PLANE UNDER μCONTROLLER TEMPERATURE SENSOR 06506-007 MAIN HEAT SOURCE (μCONTROLLER) HASH GND PLANE 7. ֪ଉ࣍ৣ࿒ڦ܈ኟඓքਆ ᆶၳ֪ଉ࣍ৣ࿒ڦ܈रേ ๑ᆩසူरേᅜݞኹዷᄲඤᇸڦොඤܔ࿒ߌد܈ഗׂิᆖၚLjժీࠕඓৣ֪࣍॔ں࿒܈ă t ๑ᆩොଚGNDೝ௬ă३ณGNDೝ௬ڦ௬ओઠሺेඤፆă t ࿒ߌد܈ഗీںᇺඤᇸă t ྺ࿒ߌد܈ഗ༵ࠃڦ܀ڇGNDೝ௬Ljଉ३ณᇑዷGNDೝ௬ڦথă t ๑ᆩڦGNDথઠሺेඤፆă t ዷඤᇸူ௬๑ᆩํ႐GNDೝ௬Ljժ୴ፆࡰఈăኄᄣ๑ዷඤᇸොඤڦඤፆፌگă 26.0 25.5 MAIN HEAT SOURCE (μCONTROLLER) TEMPERATURE SENSOR TEMPERATURE (°C) 25.0 24.5 24.0 23.5 23.0 22.5 22.0 06506-008 TIME (Minutes) 8. ຕጴ࿒ߌد܈ഗඓ߶ںጷ࣍ৣ࿒܈ ᅃၵਜ਼ࢽထྭ֪॔ഘ࿒܈ժ૧ᆩIC࿒ߌد܈ഗඓĂ၍ႠĂၚᆌ܈त๑ᆩݛՍڦ༬ۅă்ڦፌࡻስ๑ᆩ7ࢅ 8ዐ๖ڦPCBքਆ݆ݛă Rev. 0 | Page 5 of 8 AN-892 ހጎ θJAඤ ፆ ᆩ ᇀ ࿄ ๑ ᆩ ྔ և ො ඤ ഗ ހ ڦጎ Lj ഄ ڇ࿋ ྺ °C/Wăڦኵሁگሁࡻă૩සǖ أକ٫ࢅᆅগຕኮྔLj࠲ᇀހጎݛ௬࣏ᆶഄᅃၵႴᄲ ୯ڦᅺ໎ǖ t 8ᆅগMSOPހጎ = 205.9°C/W t 8ᆅগSOICހጎ = 157°C/W ހጎඤፆ ഗॲాևࠀ୲ࡼ ࡰথ࿒܈ ඤ؋ऍၚᆌ ྔ(θJC)ඤፆ ኄ߲ኸՔ࢚ଉႊೌ௬ᇑހጎ௬ኮक़ඤଉୁڦۯవᅟײ ܈ăᄺݒᆙඤଉසࢆୁྔևොඤഗڦLjᅺُᆩᇀ ๑ᆩොඤഗހڦጎăθJCඤፆڇڦ࿋°C/Wăڦኵሁ گLjඤଉ৽ሁඹᅟୁොඤഗă૩සǖ ހጎඤፆ ຕ֩ዐཚኸଇ߲ހጎႠీኸՔLjनഘ(θJA) ඤፆࢅྔ(θJC)ඤፆă t 8ᆅগMSOPހጎ = 43.74°C/W t 8ᆅগSOICހጎ = 56°C/W ഘ(θJA)ඤፆ ኄ߲ኸՔ࢚ଉႊೌ௬ᇑഘኮक़ඤଉୁڦۯవᅟ܈ײă ᄺݒᆙକඤଉසࢆཚࡗ߳ዖୟ০ሞ࣍ৣ࿒܈ኮक़ ୁڦۯăዷᄲୟ০ྺᆅগۉڟୟӱă TA MOLD COMPOUND GOLD WIRE TJ LEADFRAME DIE TCASE DIE ATTACH PAD 06506-009 DIE ATTACH ADHESIVE 9. TSSOPހጎڦপ௬ PATHS TO AIR: 1. PACKAGE TOP TO AIR: 15% 2. PACKAGE BOTTOM TO BOARD: 20% 3. PACKAGE LEADS TO BOARD: 65% 06506-010 DIE 10. ཚྫഘڦዷᄲୟ০ PATHS TO AIR: NEARLY ALL HEAT FLOWING OUT OF TOP OF PACKAGE DIE 11. ཚྫഘڦᆶୟ০ Rev. 0 | Page 6 of 8 06506-011 t t t t AN-892 ഗॲాևࠀ୲ࡼ ူ௬ڦኄ߲ࠅ๕ᅜٗຕ֩ዐڦਨܔፌۨܮٷኵևݴइڥăԥۨᅭྺፌۨܮ୲ࠀٷኵă ഄዐǖ WMAX =ഗॲዐڦፌ୲ࠀٷࡼ TAMB max =ຕ֩ዐۨᅭڦፌߛ࣍ৣ࿒܈ TA =࿒ θJA = ࣍ৣඤፆLjڇ࿋ྺ°C/W LOWER θ JA HAS BETTER POWER DISSIPATION 1.2 SOIC 1.0 0.8 MSOP 0.6 0.4 0.2 SOIC PD @ 150°C = 4.4mW MSOP PD @ 150°C = 3.4mW 0 –55 0 50 100 06506-012 MAXIMUM POWER IDSSIPATION (W) 1.4 150 TEMPERATURE (°C) 12. SOICࢅMSOPހጎዐࡼࠀڦ ހጎࡰথ႑တ ADIࠅິิׂଇዖހጎᆅগLjࡤതڦဍതᆅগࢅതᆅগ)ٗ2006ਸ๔LjADI݀քڦᆶႎഗॲኻԈࡤതଙ*ăࡰړথଇ ዖᆅগ้Lj٪ሞփཞ้ڦक़ࢅ࿒֖܈ຕăᆶതᇑതᆅগፌዘᄲڦ൶՚ރኵࡰথ࿒ڦ܈փཞăଇኁֶڦᅴሞ2ዐᆩࣨ ᅽᆖ๖ă 2. ࡰথဍതࢅതހጎڦຕ ೝฉืၽೢ୲ ᇨඤ ፌگ࿒(܈TSMIN) ፌߛ࿒(܈TSMAX) ้क़(TSMINTSMAX) ྼ้क़ ࿒܈ ้क़ ރኵࡰথ࿒܈ ํाރኵ࿒܈±5°Cᅜా้ڦक़ ူইၽೢ୲ ٗ25°Cރኵ࿒้ڦ܈क़ ဍതፇጎ(3°C/௱Ljፌٷኵ) തፇጎ(3°C/௱Ljፌٷኵ) 100°C 150°C 60௱120௱ 100°C 150°C 60௱120௱ 183°C 60௱150௱ 220°C 10௱30௱ 6°C/௱Ljፌٷኵ 6ݴዓLjፌٷኵ 217°C 60௱150௱ 260°C 20௱40௱ 6°C/௱Ljፌٷኵ 6ݴዓLjፌٷኵ Rev. 0 | Page 7 of 8 AN-892 ඤ؋ऍၚᆌ ႊೌᇑඤᇸኮक़ඤፆڦইࣷگইگඤ้क़ຕLj༵ߛႊೌ ڦඤၚᆌăඤ้क़ຕኸ࿒܈ΔՎࣅڟഄፌዕኵڦ63.2% Ⴔᄲ้ڦक़ăሞ13ዐLjADT7301ঢ়૦ٗ25°C125°Cڦ ඤ؋ऍǗཚ൧ူLjADT7301ڟٳ88.2°CႴᄲ2௱ă ᅜ ୁ ۉ ࿒ ߌ د ܈ഗ ྺ ૩ (૩ ස Lj AD590Ă AD592ࢅ TMP17)LjTO-52ĂT0-92(९14)ĂCQFPࢅSOICހጎᆯᇀ ডڦگθJC + θJAඤፆܸਏᆶডڦඤၚᆌăጀᅪLjኄၵഗॲ ுᆶGNDᆅগă 140 100 80 06506-014 TEMPERATURE (°C) 120 60 14. TO-92ހጎ 40 LFCSPހጎ)९15*ሞڹևᆶᅃ߲ূຌڹፗᇑႊೌGND থ၎ăॽኄ߲ূຌڹፗᇑPCBڦGNDೝ௬၎Ljᅜ๑ LFCSPइڥԲܠٷຕހጎ߸ڦگඤፆă 0 0 5 t = 2SECONDS 10 15 20 25 30 35 40 45 TIME (Seconds) 50 06506-013 20 13LjADT7301ڦSOT-23ࢅMSOPଇዖހጎڦඤ้क़ ຕ၎ཞăೠࠚຕLjހጎૌ႙ܔඤ้क़ຕኵڦᆖ ၚၭăኄຫܠٷຕඤଉཚࡗހጎᆅগୁۯăθJA( ഘඤፆ)ࢅθJC(ྔඤፆ)ܔ௬ཌྷጎຕጴ࿒ߌد܈ഗ ڦඤၚᆌڦᆖၚၭă ᅃӯઠຫLjGNDᆅগᇑඤᇸںڦೝ௬ీޏᆶၳথةLjᇺԲ ހጎૌ႙ዘᄲăܠٷৃړຕ࿒ߌد܈ഗৈधൽݥၭۉڦ ୁ(μAप)ăᅺُLjࠀࡼतഄᆅഐڦጲඤփᆌࡗݴ୯ ڦᅺ໎ă ©2006 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. AN06506-0-12/06(0) Rev. 0 | Page 8 of 8 06506-015 13. ADT7301ڦඤ้क़ຕ Figure 15. LFCSP 15. LFCSPހጎ