IZIXHOBO ZE-ANALOG LT8625SP Isitshintshi esiThulileyo esineSalathiso seNgxolo ePhantsi
INKCAZO
Isekethe yokubonisa i-3002A yi-18V, i-8A inyathelo lokuya ezantsi iSilent Switcher® 3 enengxolo ephezulu, ukusebenza kakuhle okuphezulu kunye noxinano lwamandla olubandakanya I-LT®8625SP. Igalelo voltage uluhlu DC3002A yi 2.7V ukuba 18V. Idemo yebhodi yokumisela i-1V kwi-8A ephezulu yemveliso ye-DC yangoku. I-LT8625SP yi-compact, ingxolo ye-ultralow, i-ultralow emission, ukusebenza kakuhle kunye nesantya esiphezulu se-synchronous monolithic step-down switching regulator. Indibaniselwano eyilwe ngokukodwa yereferensi yengxolo ephantsi kakhulu kunye nesizukulwana sesithathu Silent Switcher uyilo yenza ukuba i-LT8625SP ifezekise ukusebenza kakuhle okuphezulu kunye nokusebenza kwengxolo ebanzi ebanzi. Ubuncinci bexesha le-15ns livumela i-VIN ephezulu ukuya kwi-VOUT ephantsi yokuguqulwa kwii-frequencies eziphezulu.
I-LT8625SP yokutshintsha i-frequency inokucwangciswa nokuba nge-oscillator resistor okanye iwotshi yangaphandle ngaphezulu koluhlu lwe-300kHz ukuya kwi-4MHz. I-frequency engagqibekanga yesekethe ye-demo 3002A yi-2MHz. Iphinikhodi ye-SYNC kwibhodi yedemo isekelwe ngokungagqibekanga kusetyenziso lwemowudi yokutsiba i-ripple pulse. Ukulungelelanisa kwiwotshi yangaphandle, yisa JP1 ukuya SYNC kwaye usebenzise iwotshi yangaphandle kwi-terminal SYNC. Imo eqhubekayo enyanzelwayo (FCM) inokukhethwa ngokuhambisa iJP1 shunt. Umzobo we-1 ubonisa ukusebenza kakuhle kwesekethe kwi-5V igalelo kunye ne-12V igalelo ekusebenzeni ngokunyanzeliswa kwemodi eqhubekayo (igalelo kwi-terminal ye-VIN). Umzobo we-2 ubonisa ukushisa kwe-LT8625SP ukunyuka kwibhodi ye-demo ye-DC3002A phantsi kwe-6A kunye ne-8A iimeko zomthwalo.
Ibhodi yedemo ine-EMI filter efakiweyo. Esi sihluzo se-EMI sinokuqukwa ngokufaka igalelo voltage kwi VIN_ EMI terminal. Ukusebenza kwe-EMI kwebhodi kuboniswe kuMfanekiso 3. Umgca obomvu kwi-Radiated EMI Performance yi-CISPR32 ye-Class B umda. Ukongeza ekusebenzeni okugqwesileyo kwe-EMI, umlawuli ukwabonisa ingxolo ephantsi kakhulu kuluhlu olubanzi lwamaza, njengoko kubonisiwe kuMfanekiso 4.
I-LT8625SP yedatha yedatha inika inkcazo epheleleyo yecandelo elibandakanya ukusebenza kunye nolwazi lwesicelo. Uxwebhu lwedatha malufundwe kunye nale ncwadana yemigaqo yedemo yesekethe 3002A. I-LT8625SP ihlanganiswe kwi-4mm × 3mm iphakheji ye-LQFN kunye neepads eziveziweyo kunye nokufa okuvezwayo ngenxa yokuchasana kwe-thermal. Izindululo zoyilo lokusebenza kwe-EMI ephantsi kunye nokusebenza okuphezulu kwe-thermal ziyafumaneka kwicandelo lephepha ledatha ye-EMI ephantsi yoLwayo lwePCB kunye neNgqwalasela yeThermal.
Yila files kule bhodi yesekethe ziyafumaneka.
ISISHWANKATHELO SOKUSEBENZA
| I-PARAMETER | IMIQATHANGO | MIN | TYP | MAX | IIUNITHI |
| Igalelo Voltage Uluhlu lweVIN | 2.7 | 18 | V | ||
| Imveliso Voltage | 0.992 | 1.0 | 1.008 | V | |
| Ukutshintshela okuMiselweyo rhoqo | 1.93 | 2.0 | 2.07 | MHz | |
| Esona siphumo sangoku | Ukunciphisa kuyimfuneko kwii-VIN ezithile kunye neeMeko zeThermal | 8 | A | ||
| Ukusebenza kakuhle | VIN = 12V, fSW = 2MHz, VOUT = 1V e-IOUT = 8A | 75 | % | ||
ISISHWANKATHELO SOKUSEBENZA
Umzobo 1. LT8625SP Demo Circuit DC3002A
Ukusebenza ngokufanelekileyo vs uLondolozo lwangoku (Igalelo elisuka kwi-VIN Terminal)
Umzobo 2. Ukunyuka kobushushu vs VIN
Umfanekiso 3. LT8625SP iDemo yeSekethe DC3002A EMI Performance
(Igalelo le-12V kwi-1.0V Imveliso kwi-3A, fSW = 2MHz)
I-Radiated EMI Performance
(Uvavanyo lwe-CISPR32 lweRadiated Emission kunye neMida yoKlasi B)
Umzobo 4. LT8625SP Demo Circuit DC3002A Ingxolo
Uxinano lweSpectral (12V Igalelo kwi-1.0V Imveliso, fSW = 2MHz)
Ingxolo yeSpectral Density
INKQUBO YOKUQALA NGOKUKHAWULEZA
Isekethe yokubonisa i-3002A kulula ukuseta ukuvavanya ukusebenza kwe-LT8625SP. Nceda ujonge kuMzobo 5 wokuseta izixhobo ezifanelekileyo kwaye ulandele iinkqubo zovavanyo ezingezantsi:
PHAWULA: Xa ulinganisa igalelo okanye umthamo wemvelisotage ripple, kufuneka kuthathelwe ingqalelo ukuphepha umhlaba omde okhokelela kwi-oscilloscope probe. Ukulinganisa umthamo wemvelisotage ripple ngokuchukumisa incam yeprobe ngqo ngapha kwecapacitor yemveliso. Ngegalelo voltage ripple kunye nesiphumo esikude voltage ripple, nazo zinokulinganiswa ngokusebenzisa iziqhagamshelo SMA nge VIN_SENSE kunye VO_SENSE. Umzobo 7 ubonisa umthamo wemvelisotage ripple ilinganiswe kwimveliso capacitor C20 ngokusebenzisa VO_SENSE SMA isinxibelelanisi.
- Beka iJP1 kwindawo yeFCM.
- Xa umbane ucinyiwe, qhagamshela igalelo lonikezelo lwamandla kwi-VIN_EMI (E1) kunye ne-GND (E2). Ukuba igalelo lokucoca i-EMI alifunwa, qhagamshela igalelo lonikezelo lwamandla phakathi kwe-VIN (E17) kunye ne-GND (E18) turrets.
- Ngokucima kombane, qhagamshela umthwalo ovela kwi-VOUT (E19) ukuya kwi-GND (E20).
- Qhagamshela iDMM phakathi kwamanqaku ovavanyo lwegalelo: VIN_ SENSE (E3) kunye ne-SENSE_GND (E4) ukujonga igalelo lomthamotage. Qhagamshela iDMM phakathi kwe-VO_SENSE (E10) kunye ne-SENSE_GND (E11) ukujonga umbane wemvelisotage.
- Vula unikezelo lwamandla kwigalelo. QAPHELA: Qinisekisa ukuba igalelo voltagi-e ayidluli kwi-18V.
- Jonga umthamo wemveliso ofanelekileyotage (VOUT = 1V)
PHAWULA: Ukuba akukho mveliso, khulula okwethutyana umthwalo ukuze uqiniseke ukuba umthwalo awubekwanga phezulu kakhulu. - Kanye igalelo kunye nemveliso voltagii-es zisekwe ngokufanelekileyo, lungisa umthwalo wangoku ngaphakathi kwendawo yokusebenza ye-0A ukuya kwi-8A max ngetshaneli nganye. Qwalasela imveliso voltage ummiselo, imveliso voltagi-ripples, ukutshintsha i-node waveform, ukulayisha impendulo yesikhashana kunye nezinye iiparameters.
- Iwotshi yangaphandle ingongezwa kwi-terminal ye-SYNC xa kusetyenziswa umsebenzi we-SYNC (JP1 kwindawo ye-SYNC). I-RT resistor (R4) kufuneka ikhethwe ukuseta i-LT8625SP yokutshintsha i-frequency okungenani i-20% ngaphantsi kwe-SYNC frequency.
IIMPAWU ZOKUSEBENZA EZIQHELEKILEYO
Umzobo 6. LT8625SP Demo Circuit DC3002A Imveliso Vol.tage Ripple Measureed through J6 (12V Input, IOUT = 8A, BW Full)
Umzobo 7. Ukusebenza kweThermal kwi-VIN = 12V, fSW = 2MHz, VOUT = 1.0V, ILOAD = 8A, TA = 25 ° C
Umfanekiso 8. Iimpendulo eziThutyanayo ngamanyathelo omthwalo 0A ukuya ku-4A ukuya ku-0A ku-dl/dt = 4A/µs
ULUHLU LWEENDAWO
| INTO | QTY | IREferensi | ICANDELO INKCAZO | UMENZI/INOMBOLO YECANDELO |
| Amacandelo eSekethe afunekayo |
| 1 | 1 | C1 | ICAP., 1µF, X7R, 25V, 10%, 0603 | TAIYO YUDEN, TMK107B7105KA-T |
| 2 | 1 | C2 | ICAP., 2.2µF, X7S, 25V, 10%, 0603 | I-MURATA, GRM188C71E225KE11D |
| 3 | 2 | C3, C6 | ICAP., 22µF, X7R, 25V, 10%, 1210 | AVX, 12103C226KAT2A |
| 4 | 1 | C4 | ICAP., 100µF, ALUM ELECT, 25V, 20%, 6.3mm × 7.7mm, CE-BS SERIES | I-SUN ELECTRONIC INDUSTRIES CORP, 25CE100BS |
| 5 | 1 | C5 | ICAP., 4.7µF, X7S, 50V, 10%, 0805 | I-MURATA, GRM21BC71H475KE11K |
| 6 | 0 | C7, C9, C12, C13, C16, C22 | CAP., UKHETHO, 0603 | |
| 7 | 1 | C8 | ICAP., 0.01µF, X7R, 50V, 10%, 0603 | AVX, 06035C103KAT2A |
| 8 | 1 | C10 | ICAP., 0.1µF, X7R, 25V, 10%, 0603 | AVX, 06033C104KAT2A |
| 9 | 1 | C11 | ICAP., 82pF, X7R, 50V, 10%, 0603 | I-KEMET, C0603C820K5RAC7867 |
| 10 | 3 | C14, C18, C19 | ICAP., 2.2µF, X7S, 4V, 10%, 0603 | TDK, CGB3B1X7S0G225K055AC |
| 11 | 1 | C15 | ICAP., 22µF, X7R, 4V, 10%, 1206, AEC-Q200 | TAIYO YUDEN, AMK316AB7226KLHT |
| 12 | 1 | C20 | ICAP., 100µF, X5R, 4V, 20%, 1206 | TAIYO YUDEN, AMK316BJ107ML-T |
| 13 | 1 | C21 | ICAP., 10µF, X7S, 4V, 20%, 0603 | TDK, C1608X7S0G106M080AB |
| 14 | 2 | C23, C24 | ICAP., 4.7µF, FEEDTHRU, 10V, 20%, 0805, 3-TERM, SMD, EMI FILTER, 6A | I-MURATA, NFM21PC475B1A3D |
| 15 | 11 | E1-E6, E8-E12 | I-POINT YOVAVANYO, UQHAGAMSHELWANO LWEBHRASI, UKUPEKA I-TIN, 2.00mm
× 1.20mm × 1.40mm, VERT, SMT, NATURAL |
IHARWIN, S2751-46R |
| 16 | 4 | I-E17-E20 | INDAWO YOVAVANYO, SILVER PLATE, PHOSPHOR BRONZE, 3.81mm × 2.03mm, 2.29mm H, SMT | KEYSTONE, 5019 |
| 17 | 1 | FB1 | IND., 60Ω AT 100MHz, PWR, FERRITE BEAD, 25%, 5100mA, 15mΩ, 0603 | WURTH ELEKTRONIK, 74279228600 |
| 18 | 2 | j5, j6 | CONN., RF/COAX, SMA JACK, FEMALE, 1 PORT, VERT, ST, SMT, 50Ω, Au | MOLEX, 0732511350 |
| 19 | 2 | IJP1, JP2 | CONN., HDR, MALE, 2 × 3, 2mm, VERT, ST, THT | WURTH ELEKTRONIK, 62000621121 |
| 20 | 1 | L2 | IND., 1µH, PWR, SHIELDED, 20%, 4A, 52.5mΩ, 1616AB, IHLP-01 SERIES | I-VISHAY, IHLP1616ABER1R0M01 |
| 21 | 0 | L3 | IND., UKHETHO | |
| 22 | 1 | L4 | IND., 0.3µH, PWR, SHIELDED, 20%, 18.9A, 3.1mΩ, 4.3mm × 4.3mm, XEL4030, AEC-Q200 | I-COILCRAFT, XEL4030-301MEB |
| 23 | 4 | IMP1-MP4 | STANDOFF, INILON, SNAP-ON, 0.375″ | KEYSTONE, 8832 |
| 24 | 1 | R1 | I-RES., 499Ω, 1%, 1/10W, 0603, AEC-Q200 | VISHAY, CRCW0603499RFKEA |
| 25 | 1 | R2 | I-RES., 1Ω, 1%, 1/10W, 0603, AEC-Q200 | Umfanekiso we-CRCW06031R00FKEA |
| ITEM | QTY | REFERENCE | PART INKCAZO | MANUFACTURER/PARTNUMBER |
| 26 | 2 | I-R3. I-R12 | RES., 100k, 1%, 1/10W, 0603, AEC- 0200 | VISHAYC, RCW0603100KFKEA |
| 27 | 1 | R4 | I-RES., 47.Sk, 1%,1/10W. 0603 | VISHAYC. RCW060347K5FKEA |
| 28 | 0 | RS, R13·R17 | RES., UKHETHO, 0603 | |
| 29 | 1 | R6 | RES., 10k, 1%.1/10W, 0603, AEC-0200 | VISHAYC. RCW060310KOFKEA |
| 30 | 1 | R8 | I-RES., OQ, 3/4W, 1206, PULSE PROOF, HIGH PWR, AEC · 0200 | VISHA,YCRCWl206COOOZOEAHP |
| 31 | 2 | I-Rl 0, i-R11 | RES., 49.9k,1%,1/1OW, 0603 | VISHAYC. RCW060349K9FKEA |
| 32 | 1 | UBAMBO | RES., OQ, 1/10W, 0603, AEC·0 200 | VISHAYC, RCW06030000ZOEA |
| 33 | 1 | Ul | IC, SYN. INYATHELO · PHANTSI Isitshintshi esithe cwaka. LOFN•20 | I-ANALOG DEVICES, LT8625SPJVIRTMPBF |
| 34 | 2 | XJP1, XJP2 | CONN.. SHUNT. IBHINQA. 2 POS, 2mm | WURTH ELEKTRONIK, 60800213421 |
ISICWANGCISO SESICWANGCISO
IMBALI YOHLAZIYO
| UREV | DATE | INKCAZO | INOMBOLO YEPHEPHA |
| A | 5/24 | Ukukhutshwa kokuqala | - |
ESD Isilumkiso
ESD (electrostatic discharge) isixhobo esibuthathaka. Izixhobo ezihlawuliswayo kunye neebhodi zeesekethe zinokukhupha ngaphandle kokufunyanwa. Nangona le mveliso ine-patent okanye i-proprietary protection circuitry, umonakalo unokwenzeka kwizixhobo eziphantsi kwe-ESD yamandla aphezulu. Ke ngoko, imiqathango efanelekileyo ye-ESD kufuneka ithathwe ukunqanda ukuthotywa kokusebenza okanye ukulahleka kokusebenza.
Imigaqo neMiqathango yoMthetho
Ngokusebenzisa ibhodi yovavanyo ekuxoxwe ngayo apha (kunye nazo naziphi na izixhobo, uxwebhu lwamacandelo okanye izixhobo zenkxaso, “iBhodi yoVavanyo”), uyavuma ukubotshelelwa yimigaqo nemiqathango ebekwe ngezantsi (“Isivumelwano”) ngaphandle kokuba uthenge IBhodi yoVavanyo, apho iMigaqo yeSixhobo se-Analog kunye neMiqathango yoThengiso iya kulawula. Musa ukusebenzisa iBhodi yoVavanyo de ube ufundile kwaye uvumelene nesi siVumelwano. Ukusebenzisa kwakho iBhodi yoVavanyo kuya kubonisa ukuba uyasamkela isiVumelwano. Esi siVumelwano senziwe nguwe naphakathi kwakho (“uMthengi”) kunye ne-Analog Devices, Inc. ("ADI"), kunye nendawo yayo eyintloko yoshishino kwi-One Technology Way, eNorwood, MA 02062, eU.SA. Ngokuxhomekeke kwimigaqo nemiqathango yesiVumelwano, i-ADI apha inika uMthengi ilayisensi yasimahla, elinganiselweyo, yobuqu, eyethutyana, engakhethekanga, engagunyaziswanga, engadluliswayo yokusebenzisa iBhodi yoVavanyo NGEENJONGO KUPHELA. UmThengi uyaqonda kwaye uyavuma ukuba iBhodi yoVavanyo ibonelelwe ngeyona njongo ikuphela kwayo nekhethekileyo ekhankanywe ngasentla, kwaye uyavuma ukungasebenzisi iBhodi yoVavanyo ngayo nayiphi na enye injongo. Ngaphaya koko, iphepha-mvume elinikezelweyo lenziwa ngokucacileyo ngokuxhomekeke kule mida ilandelayo ilandelayo: UmThengi akayi (i) aqeshise, aqeshise, abonise, athengise, atshintshe, anike, anike iphepha-mvume, okanye asasaze iBhodi yoVavanyo; kwaye (ii) avumele naliphi na iQela leSithathu ukuba lingene kwiBhodi yoVavanyo. Njengoko lisetyenziswe apha, igama elithi "Iqela lesithathu" libandakanya nayiphi na iqumrhu ngaphandle kwe-ADI, uMthengi, abasebenzi babo, abadibeneyo kunye nabacebisi bangaphakathi. IBhodi yoVavanyo AYIthengiselwa uMthengi; onke amalungelo anganikwanga ngokucacileyo apha, kubandakanywa ubunini beBhodi yoVavanyo, agcinwe yi-ADI. UKUYIMFIHLO. Esi siVumelwano kunye neBhodi yoVavanyo zonke ziya kuqwalaselwa njengemfihlo kunye nolwazi oluyimfihlo lwe-ADI. UmThengi akanakho ukuxela okanye ukudlulisela nayiphi na inxalenye yeBhodi yoVavanyo kulo naliphi na elinye iqela ngaso nasiphi na isizathu. Emva kokuyeka ukusetyenziswa kweBhodi yoVavanyo okanye ukupheliswa kwesi siVumelwano, uMthengi uyavuma ukubuyisela ngokukhawuleza iBhodi yoVavanyo kwi-ADI. IZITHINTELO EZONGEZELELWEYO. UmThengi akanako ukuqhawuka, ukudibanisa okanye ukubuyisela umva iitshiphu zobunjineli kwiBhodi yoVavanyo. UmThengi uya kwazisa i-ADI ngawo nawuphi na umonakalo owenzekileyo okanye naluphi na utshintsho okanye iinguqulelo ezenzayo kwiBhodi yoVavanyo, kubandakanywa kodwa kungaphelelanga ekuthengiseni okanye nawuphi na omnye umsebenzi ochaphazela umxholo weBhodi yoVavanyo. Uhlengahlengiso kwiBhodi yoVavanyo kufuneka luthobele umthetho osebenzayo, kubandakanywa kodwa kungaphelelanga kuMyalelo weRoHS. UKUPHELA. I-ADI inokusiphelisa esi siVumelwano nangaliphi na ixesha xa inikezela ngesaziso esibhaliweyo kuMthengi. UmThengi uyavuma ukubuyela kwi-ADI kwiBhodi yoVavanyo ngelo xesha. UMNIKELO WOXANDUVA. IBHODI YOVAVANYO ENIKEZELWE APHA NGAPHANSI INIKEZELWE “NJENGOKO IKHO” KWAYE I-ADI AYENZI IZIQINISEKISO OKANYE UMELWE Lluphi na Udidi NGENXAPHO KUYO. I-ADI IYAYINXA NGOKUCHAZELEYO NAKUPHI NA UKUMELELWA, IZIQINISEKISO, IZIQINISEKISO, OKANYE IZIQINISEKISO, EZINGCACILEYO OKANYE EZICIKIWEYO, EZINXULUMENE NEBHODI YOVAVANYO KUBANDAKANYA, KODWA AYIMDA, ISIQINISEKISO ESIXINWEYO SORHWEBO, UBUHLUNGU, UBUHLUNGU. UKUNGAXHOHLWA KWAMALUNGELO EPROPATI ENGCACILEYO. AKUKHO MFANEKISO I-ADI KUNYE NABANIKEZI PHEPHA-MVUME BAYO BAYA KUTHWALA NASO NAsiphi na isiganeko, ESIKHETHEKILEYO, ESINGATHETHWANGA, OKANYE UMONAKALO OLUPHUMELELEYO OLUPHUMA KWIMANDLA KAMTHENGI OKANYE UKUSETYENZISWA KWEBHODI YOVAVANYO, KUBANDAKANYEKA KODWA AKUMDAWU WENTLAWULO YOKULAHLEKILEYO, IINTLAWULO, KODWA AYIMDA. INKOSI YOMHLE. I-ADI'S IYONKE I-LIABILITY KUYA KUNYE KUNYE ZONKE IZIBANGA IYA KUNIKEZWA KWISIXA ESIKHULU ESIKHULU seedola zase-US ($100.00). UKUTHUNYELWA KWAMANYE AMAZWE. UmThengi uyavuma ukuba ayizukuthumela ngokuthe ngqo okanye ngokungathanga ngqo iBhodi yoVavanyo kwelinye ilizwe, kwaye iyakuthobela yonke imithetho esebenzayo yase-United States kunye nemimiselo enxulumene nokuthunyelwa ngaphandle. UMTHETHO OLAWULAYO. Esi siVumelwano siya kulawulwa kwaye sithatyathwe ngokungqinelana nemithetho ebambekayo yeCommonwealth yaseMassachusetts (kungabandakanywa ungquzulwano lwemithetho yomthetho). Naliphi na inyathelo elisemthethweni malunga nesi siVumelwano liya kuviwa kurhulumente okanye kwiinkundla zomdibaniso ezinegunya eSuffolk County, Massachusetts, kunye noMthengi ngale ndlela ungenisa kulawulo lomntu kunye nendawo yeenkundla ezinjalo.
Amaxwebhu / Izibonelelo
 |
IZIXHOBO ZE-ANALOG LT8625SP Isitshintshi esiThulileyo esineSalathiso seNgxolo ePhantsi [pdf] Incwadi Yomyalelo I-LT8625SP Silent Switcher eneReference yeNgxolo ePhantsi, LT8625SP, iSilent Switcher eneReference yeNgxolo ePhantsi, iSwitcher esineReference yeNgxolo ePhantsi, iReference yeNgxolo ePhantsi, iReference yeNgxolo, iReference |