Gulu laukadaulo la Slkor limachokera ku Tsinghua University. Monga Kampani Yapamwamba Yaukadaulo Yadziko Lonse, Slkor adapanga zida zamagetsi za silicon carbide koyambirira ndipo yakula kukhala kampani yophatikiza kafukufuku ndi chitukuko, kapangidwe, malonda, ndi ntchito zaukadaulo. Chikhalidwe chake chamakampani ndi chophatikiza, chotseguka, komanso chatsopano.SLKORKampaniyi yadziwika padziko lonse lapansi komanso yatchuka, ndipo gawo lake pamsika likukwera nthawi zonse, ndipo yapeza ziphaso kuphatikizapo ISO9001, RoHS, REACH, ndi California Proposition 65.

Slkor ili ndi mabungwe ofufuza ndi chitukuko ku Beijing ndi Suzhou, ndi labotale ndi malo osungiramo zinthu ku likulu lake ku Shenzhen. Makampani akuluakulu akuphatikizapo ma diode ndi ma transistors, zida zamagetsi, ndi ma IC oyendetsera magetsi. Kampaniyo ikupanga pang'onopang'ono zinthu zatsopano monga Hall sensors, ADCs, BMS, ma optocouplers othamanga kwambiri, ndi ma crystals osagwira ntchito. Izi zimagwiritsidwa ntchito m'mafakitale monga mafoni a m'manja, ma laputopu, ma robotics, zida zamagetsi, magalimoto olumikizidwa, zinthu za digito za 3C, ndi intaneti ya Zinthu, mogwirizana ndi ogwirizana nawo oposa zikwi khumi padziko lonse lapansi!

Webusaiti yovomerezeka ya Slkor yapangidwa kukhala nsanja yophunzirira ndikusinthana mkati mwa makampani opanga ma semiconductor, ndikupanga njira zamafakitale mu malo ochezera a pa intaneti kuti zithandize chitukuko cha ntchito za kampaniyo. Masomphenya a kampaniyo ndikukhala "Mtsogoleri wa Semiconductor" kudzera mu khama losalekeza la ogwira nawo ntchito kwa zaka makumi atatu!

1.1 Dzina: Njira Yothandizira Kuyendetsa Chip ya Slkor SL4139 Driver

1.2 Mapulogalamu:
Zipangizo zamagetsi zamagalimoto, makina oyendera a GPS, Zosewerera Zambiri Zonyamula (PMP), zida zonyamulira m'manja, madalaivala amagetsi osasintha, magetsi okongoletsa.

2. Phukusi: Chip imagwiritsa ntchito phukusi laling'ono la SOT23-5.

2.1 Zinthu Zogulitsa

SL4139 ndi chosinthira mphamvu cha DC/DC chomwe chimapangidwa kuti chipereke mphamvu yoyendetsera yokhazikika komanso yolondola ya ma LED angapo.
Ndi ma frequency osinthika a 1MHz, SL4139 ingagwiritsidwe ntchito ndi ma capacitor ang'onoang'ono akunja a ceramic ndi ma inductor. Mphamvu yosinthika, yokhazikitsidwa ndi resistor yakunja R1, imalola SL4139 kuyendetsa ma LED angapo olumikizidwa motsatizana. SL4139 ndi yoyenera kuyendetsa ma LED amtundu womwewo, omwe amatha kuyendetsa ma LED oyera mpaka 9 motsatizana kapena kunyamula voliyumu yayikulu yoyendetsera ya 32V.

Kuwala kwa LED kungasinthidwe pogwiritsa ntchito mphamvu ya DC, chizindikiro cha logic, kapena chizindikiro cha Pulse Width Modulation (PWM). Choyimitsa chowongolera (SHDN) chimalola chipangizocho kugwira ntchito mu shutdown mode yokhala ndi mphamvu yotsika kwambiri.

2.2 Voliyumu yayikulu yoyendetsera: 32V; Chitetezo cha overvoltage cha LED chotseguka; Mphamvu yayikulu yosinthira mphamvu: 90%.

Ma frequency okhazikika a 3.0 1MHz okhala ndi phokoso lochepa.

3.1 Mphamvu yozimitsa < 10uA.

3.2 Kutseka kwa Undervoltage (UVLO) malire: 3.3V.

3.3 Kutentha kogwira ntchito: -40℃ mpaka +85℃.

4. Slkor SL4139 White LED Driver Application Circuit

5. Mfundo Yogwiritsira Ntchito

5.1 Mphamvu imaperekedwa kudzera mu cholumikizira cha Kinghelm (KH) cha 16-pin Type-C, chomwe chimatulutsa 5V ku SL4139. Pambuyo pa DC/DC boosting ndi SL4139, mphamvu yoyendetsera magetsi ya LED yokhazikika imaperekedwa kuti iunikire ma LED. SL4139 ndi chosinthira mphamvu yokhazikika (1MHz), chotsika phokoso, komanso chothandizira mphamvu yoyendetsera magetsi chomwe chimapereka mphamvu yokhazikika yokhala ndi mzere wabwino kwambiri komanso malamulo oyendetsera katundu. Chipangizochi chimagwiritsa ntchito switch ya NMOS yamagetsi apamwamba pakati pa SW pin ndi GND kuyendetsa inductor. Pamene switch ya NMOS yazimitsidwa, mphamvu yosungidwa mu inductor imatulutsidwa kupita ku katundu kudzera mu Schottky diode. Kuzungulira kwa ntchito ya switch ya NMOS kumasinthidwa mkati ndikuwongoleredwa kutengera mphamvu yoyankha pa FB pin, pamapeto pake kuwongolera mphamvu ya FB pin kukhala 0.3V yokhazikika. Mphamvu yoyenda kudzera mu LED imasiyana molingana ndi mtengo wa resistor (I = 0.3V / R1).

5.2 SL4139 ili ndi dera loteteza kutentha kwambiri. Pamene kutentha kwa malo olumikizirana kupitirira 150℃, chipangizocho chimasiya kugwira ntchito mpaka kutentha kutsika kufika pa 130℃, pomwe ntchito yanthawi zonse imayambiranso.

5.3 Ngati LED yatsegula, njira yowongolera ma feedback imatsegulidwa, zomwe zimapangitsa kuti magetsi otulutsa achuluke nthawi zonse. Mphamvu yotulutsa ikapitirira 37V, magetsi oteteza mkati amayamba kugwira ntchito, zomwe zimapangitsa kuti chipangizocho chikhale chotetezeka pang'ono.

5.4 SL4139 ingagwiritsidwe ntchito mu GPS navigation systems, ma multimedia players onyamulika, zipangizo zonyamulika m'manja, magetsi, ma drivers amagetsi osasintha, ndi zina zotero.

5.5 Kuti mudziwe zambiri zokhudza kugwiritsa ntchito, chonde onani bolodi la DEMO la Ring Light pansipa:

6. Malangizo ochokera ku Slkor Applications for Engineers:

SL4139 ndi chowongolera kusintha kwa ma frequency ambiri. Kuti muchepetse EMI, ripple, ndi phokoso, ma PCB traces omwe ali ndi ma high-frequency switching currents ayenera kuyikidwa mosamala. Mizere yolimba yomwe ili pachithunzi pamwambapa ikuwonetsa njira za ma high-frequency switching currents. Ma traces onsewa ayenera kukhala afupi komanso otakata kuti achepetse kulowerera ndi kukana kwa parasitic. Pachithunzi pansipa, Loop ① ndi njira yamagetsi pamene switch yamkati ya SL4139 yatsekedwa. Loop ② ndi njira yamagetsi pamene switch yamkati ya SL4139 yatsegulidwa. Madera a ma loops onsewa ayenera kusungidwa ang'onoang'ono momwe angathere.

7. BOM (Bill of Materials) Chidziwitso cha Slkor LED Driver Chip SL4139 DEMO Board ndi motere:

Slkor Semiconductor, pofuna kuthandiza makasitomala ndi ogulitsa kuti agwiritse ntchito zinthu zatsopano za mtundu wa "slkor" komanso kulimbikitsa ntchito zothandizira makasitomala, imapereka zambiri mwatsatanetsatane za malonda. Chonde funsani antchito athu!