Lub ntsiab lus ntawm Kev Ntsuas Siab Tshaj Plaws

Tsis txhob tshaj qhov kev ntsuas siab tshaj plaws uas tau teev tseg hauv cov ntawv teev lus thiab cov ntawv teev npe, txawm tias tam sim no. Tshwj xeeb, cov ntsiab lus hauv qab no yuav tsum tau sau tseg:

1. Thaum ua haujlwm ntawm LED, cov ntsiab lus LED tuaj yeem raug puas tsuaj los ntawm cov kab hluav taws xob tam sim no tsim thaum lub zog hloov hluav taws xob qhib thiab tawm lossis thaum cov zis hloov kho. Ua ntej siv, nco ntsoov xyuas cov yam ntxwv hloov pauv ntawm lub zog hluav taws xob thiab xyuas kom meej tias qhov tam sim no tsis dhau qhov ntsuas qhov siab tshaj plaws ntawm qhov tam sim no.

2. Yog tias lub ntsiab lus LED tau tsav dhau qhov kev ntsuas siab tshaj plaws ntawm qhov tam sim no rau pem hauv ntej, qhov kev ntseeg siab ntawm cov khoom siv LED yuav poob qis heev. Tsis tas li ntawd, thaum tsav tsheb LED hauv pulses, xyuas kom meej tias cov mem tes tam sim no tsis pub dhau qhov siab tshaj qhov tso cai mem tes tam sim no tus nqi teev tseg hauv cov ntaub ntawv "Forward Current - Pulse Duration".

3. Qhov kev ntsuas siab tshaj plaws tau teev tseg ntawm qhov ntsuas kub (ntawm qhov taw tes solder) ntawm 25 ° C. Yog li ntawd, qhov kub thiab txias, qhov siab tshaj qhov ntsuas. Yog li ntawd, raws li qhov kub thiab txias, qhov siab tshaj plaws rau pem hauv ntej tam sim no thiab kev tso cai poob qis thiab kev khiav hauj lwm ntau yog txwv, yog li tsim nrog ntau leeway li sai tau.

4. Muaj kev sib raug zoo ntawm qhov kub thiab txias (Tj) thiab thermal tsis kam (Rthjs), thiab yuav tsum tau saib xyuas kom ntseeg tau tias qhov kub ntawm qhov sib txuas tsis pub dhau qhov ntsuas qhov siab tshaj plaws raws li hauv qab no:

   Tj=Rthjs x Pd + Ts

   Txhua qhov ntsuas muaj cov ntsiab lus hauv qab no

   Tj: Kev sib tshuam kub
   Rthjs: Thermal Resistance
   Ts: Kub ntawm solder point

   Saib thiab.

   Pd=VfxIf
   Vf: Forward voltage
   Yog: Forward tam sim no
   Po: Radiant Zog

5. Tsis txhob siv qhov rov qab voltage siab tshaj qhov ntsuas siab tshaj plaws.