Zvekuchinja switch mode, yakanakisa yakadhindwa redunhu bhodhi (Pcb) dhizaini yakakosha pane yakakwana sisitimu yekuita. Kana pcb dhizaini isina kukodzera, inogona kukonzeresa mhedzisiro inotevera: ruzha rukuru kune dunhu rekudzora uye kukanganisa kugadzikana kweiyo system; Kunyanyisa kurasikirwa paPCB trace mutsara inokanganisa mashandiro ehurongwa; Kukonzera kukanganisika kwemagetsi emagetsi uye kukanganisa kusangana kwehurongwa.

ZXLD1370 ndeye multi-topology switching mode LED driver mutyairi, yega yega topology inosanganisirwa neyekunze switching zvishandiso. Mutyairi we LED akakodzera buck, kukurudzira kana bhuru – yekuwedzera modhi.

Iri bepa rinotora ZXLD1370 chishandiso semuenzaniso wekukurukura nezve kufunga kwePCB dhizaini uye nekupa akakodzera mazano.

Funga nezve hupamhi hwekutsvaga

Nekuchinja maseketi emagetsi emagetsi, switch huru nemagetsi anofambidzana anotakura mafashama makuru. Zvisaririra zvinoshandiswa kubatanidza izvi zvishandiso zvine zvinopesana zvinehukobvu nehupamhi, hupamhi, uye kureba. Iko kupisa kunogadzirwa neiyo yazvino kuyerera kuburikidza neiyo trace haingoderedze kushanda chete asi zvakare inosimudza tembiricha yeiyo trace. Kugomesa tembiricha kumuka, zvakakosha kuti uve nechokwadi chekuti trace upamhi hwakakwana kuti ubate neyakaenzana switching yazvino.

Iyi inotevera equation inoratidza hukama pakati pekupisa tembiricha uye nekuteedzera kuyambuka-chikamu chikamu.

Yemukati yekutsvaga: I = 0.024 × DT & 0.44 TImes; A 0.725

Ini = 0.048 × DT & 0.444 TImes; A 0.725

Kupi, ini = kwakanyanya ikozvino (A); DT = tembiricha inokwira kumusoro kupfuura nharaunda (℃); A = kuyambuka-chikamu chikamu (MIL2).

Tafura 1 inoratidza hushoma hwekuteedzera hupamhi hwehukama hwazvino huwandu. Izvi zvinoenderana nezvibodzwa zve1oz / FT2 (35μm) yemhangura foil ine trace tembiricha inokwira 20oC.

Tafura 1: External trace upamhi uye zvazvino chinzvimbo (20 ° C).

Tafura 1: External trace upamhi uye zvazvino chinzvimbo (20 ° C).

Zvekuchinja mamodhi emagetsi ekushandura mafomu akagadzirwa nemaSMT zvishandiso, iyo yemhangura pamusoro pePCB inogona zvakare kushandiswa senzvimbo yekupisa yemidziyo yemagetsi. Trace tembiricha inokwira nekuda kwekufambisa kwazvino inofanira kuderedzwa. Zvinokurudzirwa kuti tembiricha yekukwira simukire kune 5 ° C.

Tafura 2 inoratidza hushoma hwekuteedzera hupamhi hwehukama hwazvino huwandu. Izvi zvinoenderana nezvibodzwa zve 1oz / ft2 (35μm) yemhangura foil ine trace tembiricha inokwira 5oC.

Tafura 2: External trace upamhi uye zvazvino chinzvimbo (5 ° C).

Tafura 2: External trace upamhi uye zvazvino chinzvimbo (5 ° C).

Funga nezve maratidziro marongero

Iyo maratidziro marongero anofanirwa kuve akagadzirwa nenzira kwayo kuti uwane kuita kwakanyanya kuita kweZXLD1370 LED mutyairi. Iyi inotevera nhungamiro inogonesa ZXLD1370 yakavakirwa manyorerwo kuti agadzirirwe ekunyanyisa kuita mune ese mabhuru uye kusimudzira modes.