Nrov lub teeb emitting diode poob rau 1.6V-2.1V, thiab cov yam ntxwv ntawm kev ua haujlwm tam sim no ntawm 5-20mA LED 1. Lub ntsiab lus ntawm qhov txwv tsis pub muaj (1) Kev cog lus lub zog noj PM: cog lus tias yuav ntxiv ob lub taub hau ntawm LED rau DC voltage voltage Qhov qub tshaj plaws hmo ntuj uas ntws los ntawm nws. Hla tus nqi no, LED kub taub hau thiab kev puas tsuaj. (2) Zoo DC tam sim no IFM: Qhov tseem ceeb tshaj plaws databst tam sim no tau cog lus tseg. Tus nqi no tuaj yeem rhuav tshem cov diode. (3) Rov qab voltage VRM: Qhov qub qub rov qab voltage tau cog lus tias yuav ntxiv. Nrog rau tus nqi no, lub teeb emitting diode tej zaum yuav tawg thiab puas. (4) TOPM: Qhov ntsuas kub ntawm lub teeb-emitting diode tuaj yeem ua haujlwm ib txwm. Hauv qab lossis siab tshaj qhov ntsuas kub no, lub teeb-emitting diode yuav tsis ua haujlwm zoo, thiab qhov cuam tshuam ntawm kev poob qis. 2. Qhov tseem ceeb ntawm cov hluav taws xob tsis zoo (1) Kev ua haujlwm zoo tam sim no IF: Nws yog hais txog qhov zoo tam sim no tus nqi ntawm lub teeb ci ntawm lub diode thaum glowing diode. Hauv kev siv tiag tiag, koj yuav tsum xaiv yog tias koj xav tau xaiv yog tias koj xav tau
·Hauv qab no ifm. (2) Qhov zoo ua haujlwm voltage VF: Lub zog ua haujlwm tau muab rau hauv cov lus ntsuas tau txais raws li qhov muab tam sim no. Nws feem ntau yog ntsuas thaum IF = 20mA. Lub luminous diode yog nyob rau ntawm kev khiav hauj lwm voltage VF ntawm 1.4 3V. Thaum qhov kub ntawm sab nraud nce, VF yuav tsaws. (3) V-I feature: Thaum kev sib raug zoo ntawm qhov hluav taws xob thiab tam sim no ntawm lub teeb-emitting diode tsawg dua ib qho nqi (hu ua qhov pib), tam sim no me me heev thiab tsis tawm lub teeb. Thaum lub voltage spans ib tug nqi, lub pem hauv ntej tam sim no agile nrog voltage thiab glows. Yuav ua li cas tshem tawm kuv tuaj yeem tshem tawm qhov zoo voltage ntawm lub teeb lub teeb, qhov rov qab tam sim no thiab qhov rov qab voltage ntawm lub teeb yeeb nkab los ntawm yuav ua li cas tshem tawm V-LED teeb hlaws. Qhov zoo luminous yeeb nkab thim rov qab IR tam sim no
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