PMIC-LED Driver Chip Silk Screen LP8861QPWPRQ1 IC Integrated circuit
LP8861-Q1 ili ndi mwayi woyendetsa p FET yakunja kuti ichotse zolowetsa kuchokera kudongosolo pakagwa vuto ndikuchepetsa kugwiritsa ntchito mphamvu kwapano komanso kuyimilira.Chipangizocho chikhoza kuchepetsa
Kuwala kwa LED kutengera kutentha komwe kuyeza ndi sensa yakunja ya NTC kuteteza LED kuti isatenthedwe ndikuwonjezera moyo wa LED.
Ma voliyumu olowera a LP8861-Q1 amachokera ku 4.5 V mpaka 40 V kuthandizira kuyimitsidwa kwamagalimoto / kuyambitsa ndi kunyamula katundu.LP8861-Q1 imaphatikizira kuzindikira zolakwika ndi mawonekedwe achitetezo.
Makhalidwe a Zamalonda
| TYPE | DESCRIPTION |
| Gulu | Magawo Ophatikizana (ICs) PMIC - Madalaivala a LED |
| Mfr | Texas Instruments |
| Mndandanda | Magalimoto, AEC-Q100 |
| Phukusi | Tape & Reel (TR) Dulani Tepi (CT) Digi-Reel® |
| Gawo Status | Yogwira |
| Mtundu | DC DC Regulator |
| Topology | SEPIC, Step-Up (Boost) |
| Masinthidwe Amkati | Inde |
| Chiwerengero cha Zotuluka | 4 |
| Voltage - Supply (Mphindi) | 4.5V |
| Voltage - Supply (Max) | 40v ndi |
| Voltage - Kutulutsa | 45v ndi |
| Zamakono - Zotulutsa / Channel | 100mA |
| pafupipafupi | 300kHz ~ 2.2MHz |
| Kuthima | Zithunzi za PWM |
| Mapulogalamu | Magalimoto, Backlight |
| Kutentha kwa Ntchito | -40°C ~ 125°C (TA) |
| Mtundu Wokwera | Surface Mount |
| Phukusi / Mlandu | 20-PowerTSSOP (0.173", 4.40mm M'lifupi) |
| Phukusi la chipangizo cha Supplier | 20-HTSSOP |
| Nambala Yoyambira Yogulitsa | Chithunzi cha LP8861 |
Woyendetsa LED
Kodi Dalaivala ya LED ndi chiyani?
Dalaivala ya LED ndi chipangizo chamagetsi chosinthidwa ndi mphamvu chomwe chimayendetsa ntchito yachibadwa ya kuwala kwa LED kapena msonkhano wa module wa LED.Chifukwa cha mawonekedwe a magetsi a LED PN mphambano, imatha kutengera mphamvu yamagetsi komanso kusiyanasiyana kwamagetsi komwe kumakhala kocheperako, kupatuka pang'ono sikungathe kuyatsa kuwala kwa LED kapena kuwala kumachepetsedwa kwambiri, kapena kufupikitsa moyo. wa chip kapena ngakhale kuwotchedwa.Mphamvu zamagetsi zomwe zikuchitika m'mafakitale ndi magetsi omwe amagwiritsidwa ntchito nthawi zambiri sali oyenera kuperekedwa mwachindunji kwa ma LED, ndipo dalaivala wa LED ndi gawo lamagetsi lomwe limatha kuyendetsa ma LED kuti azigwira ntchito pamagetsi abwino kwambiri kapena apano.
Mapulogalamu
Kugwiritsa ntchito Madalaivala a LED.
Monga ma LED amagwiritsidwa ntchito pafupifupi m'madera onse a zamagetsi, ndi kusiyana kosayembekezereka kwa kuwala kowala, kuwala kwa kuwala, ndi kuyatsa / kuzimitsa, madalaivala a LED akhala pafupifupi zipangizo za servo, zomwe zimapanga mitundu yosiyanasiyana ya zipangizo.Dalaivala wosavuta kwambiri wa LED (ngati mutha kuyitcha) mwina ndi gawo limodzi kapena zingapo zofananira zolimbana ndi gawo lomwe limagawanitsa magetsi ndi magetsi, ndipo sizinthu zodziyimira zokha.Pazinthu zambiri zamalonda zomwe zimafuna kutulutsa kokhazikika kwanthawi zonse ndi magetsi, njira zingapo zamakina zokhala ndi mphamvu zowongolera mphamvu zapangidwa.Kukwaniritsidwa kwa mayankhowa nthawi zambiri kumafuna mawonekedwe ozungulira ovuta kwambiri, omwe maziko ake ndi kuphatikiza kwa ma driver a LED ICs.Mwa kukhazikitsa mabwalo osiyanasiyana othandizira pamphepete mwa ma ICs oyendetsa ma LED, mayankho amatha kupangidwira ntchito zosiyanasiyana za LED, kuchokera ku mawonedwe ang'onoang'ono a foni yam'manja ndi madalaivala owunikira makiyi mpaka kuyatsa kwamphamvu kwapamsewu kwa LED ndi mawonedwe akulu akunja a LED.
Mapangidwe ndi kupereka kwa madalaivala amphamvu kwambiri a LED nthawi zambiri amapangidwa ndi makampani apadera.Makampaniwa amawaika m'ma modules kenako amawapereka kwa opanga zinthu zogwiritsa ntchito ma LED.Kufunika kwapadera kwa madalaivala a LED muzogwiritsira ntchito za LED ndi zofunikira zambiri za ogwiritsa ntchito kumapangitsa woyendetsa LED IC, mtima wa dalaivala wa LED, chinthu chofunika kwambiri pazitsulo zonse zamakono.Dalaivala ndiye gawo lalikulu la kuyatsa kwa LED.Ndi kukula kwa teknoloji ya chipangizo cha LED, khalidwe la kuwala kwa LED kwakhala lodalirika kwambiri moti nthawi zambiri kulephera kwa nyali za LED kumachokera kwa dalaivala.
Kufotokozera
LP8861-Q1 ndi magalimoto apamwamba kwambiri, otsika-EMI, osavuta kugwiritsa ntchito dalaivala wa LED wokhala ndi chosinthira chophatikizira / SEPIC.Ili ndi masinki anayi olondola kwambiri apano omwe angapereke kuwongolera kowala kwambiri ndi chizindikiro cha PWM.
Chosinthira cha boost/SEPIC chimakhala ndi zowongolera zotulutsa magetsi kutengera ma voliyumu apamutu akuzama a LED.Izi zimachepetsa kugwiritsa ntchito mphamvu mwa kusintha mphamvu yamagetsi kuti ikhale yotsika kwambiri muzochitika zonse.The boost/SEPIC converter imathandizira kufalikira kwa masinthidwe osinthika komanso kulumikizana kwakunja ndi pini yodzipereka.Ma frequency osinthika osiyanasiyana amalola LP8861-Q1 kupewa kusokoneza band ya wailesi ya AM.
LP8861-Q1 ili ndi mwayi woyendetsa p-FET yakunja kuti ichotse zolowetsa kuchokera kudongosolo pakagwa vuto ndikuchepetsa kugwiritsa ntchito mphamvu kwapano komanso kuyimilira.Chipangizochi chikhoza kuchepetsa ma LED panopa potengera kutentha komwe kumayesedwa ndi sensa yakunja ya NTC kuteteza LED kuti isatenthedwe ndikuwonjezera moyo wa LED.
Ma voliyumu olowera a LP8861-Q1 amachokera ku 4.5 V mpaka 40 V kuthandizira kuyimitsidwa kwamagalimoto / kuyambitsa ndi kunyamula katundu.LP8861-Q1 imaphatikizira kuzindikira zolakwika ndi mawonekedwe achitetezo.
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