Kwizixhobo ze-elektroniki, kuya kuba nomlinganiselo othile wokushisa xa usebenza, ukwenzela ukuba ukushisa kwangaphakathi kwezixhobo kukhuphuke ngokukhawuleza. Ukuba ubushushu abukhutshwanga ngexesha, izixhobo ziya kuqhubeka zifudumeza, isixhobo siya kusilela ngenxa yokushisa, kwaye ukusebenza okuthembekileyo kwezixhobo zombane kuya kuncipha. Ngoko ke, kubaluleke kakhulu ukuqhuba unyango olulungileyo lokutshatyalaliswa kobushushu kwi ibhodi yesekethe.

1. I-foil yobhedu yokutshatyalaliswa kobushushu kunye nokusetyenziswa kwendawo enkulu yombane wobhedu we-foil.

Ngokomzobo ongentla, indawo enkulu edibene nesikhumba sobhedu, iyancipha iqondo lokushisa lokuhlangana

Ngokomzobo ongentla, kunokubonwa ukuba inkulu indawo ehlanganiswe nobhedu, iyancipha iqondo lokushisa lokuhlangana.

2. Umngxuma oshushu

Umngxuma oshushu unokunciphisa ngokufanelekileyo ubushushu besiphambuka sesixhobo, ukuphucula ukufana kweqondo lobushushu kwicala lobunzima bebhodi, kwaye unike ithuba lokwamkela ezinye iindlela zokupholisa ngasemva kwePCB. Iziphumo zokulinganisa zibonisa ukuba ukushisa kwe-junction kungancitshiswa malunga ne-4.8 ° C xa ukusetyenziswa kwamandla okushisa kwesixhobo ngu-2.5W, i-spacing yi-1mm, kunye noyilo oluphakathi luyi-6 × 6. Umahluko weqondo lobushushu phakathi komphezulu nophantsi we-PCB uncitshisiwe ukusuka kwi-21°C ukuya kwi-5°C. Iqondo lokushisa elidibeneyo lesixhobo landa ngo-2.2 ° C xa lithelekiswa nelo 6 × 6 emva kokuba uluhlu lwe-hot-hole lutshintshwe lube ngu-4 × 4.

3. I-IC ibuyele ubhedu obuveziweyo, ukunciphisa ukuxhathisa kwe-thermal phakathi kwesikhumba sobhedu kunye nomoya

4. Uyilo lwePCB

Iimfuno zamandla aphezulu, izixhobo ezishushu.

A. Izixhobo ezibuthathaka kubushushu kufuneka zibekwe kwindawo yomoya obandayo.

B. Isixhobo sokubona ubushushu kufuneka sibekwe kweyona ndawo ishushu.

C. Izixhobo ezikwibhodi enye eprintiweyo kufuneka zicwangciswe kangangoko kunokwenzeka ngokwexabiso le-calorific kunye neqondo lokutshatyalaliswa kobushushu. Izixhobo ezinexabiso eliphantsi le-calorific okanye ukunganyangeki kobushushu (njengama-transistors amancinci amancinci, amancinci amancinci adibeneyo, i-electrolytic capacitors, njl. Izixhobo ezinexabiso eliphezulu le-calorific okanye ukumelana nobushushu obulungileyo (njengama-transistors amandla, iisekethe ezinkulu ezidibeneyo, njl.)

D. Kwicala elithe tye, izixhobo eziphezulu zamandla kufuneka zilungiswe ngokusondeleyo kunokwenzeka kumda webhodi eprintiweyo ukunciphisa umzila wokushisa ubushushu; Kwindlela ethe nkqo, izixhobo eziphezulu zamandla zilungiselelwe ngokusondeleyo kangangoko kunokwenzeka kwibhodi eprintiweyo, ukwenzela ukunciphisa impembelelo yezi zixhobo kwiqondo lokushisa kwezinye izixhobo xa zisebenza.

E. Ukutshatyalaliswa kobushushu bebhodi eprintiweyo kwisixhobo ikakhulu kuxhomekeke ekuhambeni komoya, ngoko ke kuyimfuneko ukufunda indlela yokuhamba komoya kunye nokuqwalasela ngokufanelekileyo izixhobo okanye iibhodi zesekethe eziprintiweyo kuyilo. Ukuhamba komoya kuhlala kuthanda ukuhamba apho ukuchasana kuncinci, ngoko ke xa uqwalasela izixhobo kwiibhodi zesekethe eziprintiweyo, gwema ukuba ne-airspace enkulu kwindawo ethile. Ukucwangciswa kweebhodi zeesekethe ezininzi eziprintiweyo kumatshini wonke kufuneka zihlawule ingqalelo ingxaki efanayo.

F. isixhobo esinobuntununtunu ubushushu ibekwe kwindawo yobushushu esezantsi (ezifana ezantsi isixhobo), musa ukuyibeka phezu isixhobo zokufudumeza ngqo ngasentla, izixhobo ezininzi best egxadazeleni ubeko kwinqwelo-moya ethe tye.

G. Beka izixhobo ngezona zixhobo zisetyenziswa ngamandla kunye nokufudumeza okuphezulu kufutshane neyona ndawo ilungileyo yokulahla ubushushu. Musa ukubeka izinto ezishushu kwiikona nakwimiphetho yebhodi eprintiweyo ngaphandle kokuba kukho isixhobo sokupholisa kufutshane nayo. Kuyilo lokumelana namandla likhulu kangangoko kunokwenzeka ukukhetha isixhobo esikhulu, kunye nohlengahlengiso lwebhodi eprintiweyo yoyilo ukuze kubekho indawo eyaneleyo yokutshatyalaliswa kobushushu.

H. Izithuba ezicetyiswayo zamacandelo: