I-AN5853
Inothi lesicelo

Imihlahlandlela ye-PCB eshisayo ye-VL53L7CX Isikhathi-sendiza engu-8x8 multizone inzwa ehlukahlukene eno-90° FoV

Isingeniso

Uma isetshenziswa kumodi eqhubekayo, imojuli ye-VL53L7CX idinga ukuphathwa okushisayo okucophelelayo ukuze kuqinisekiswe ukusebenza kwedivayisi okuseqophelweni eliphezulu nokugwema ukushisa ngokweqile.

Ithebula 1. Imingcele ye-thermal eyinhloko

Ipharamitha	Uphawu	Okuncane	Thayipha	Ubukhulu	Iyunithi
Ukusetshenziswa kwamandla	P	-	216 (¹)	430 (²)	mW
Ukumelana nokushisa kwemojuli	isimo	-	40	-	°C/W
Izinga lokushisa lokuhlangana (³)	Tj	-	-	100	°C
Ibanga lokushisa elisebenzayo	T	-30	25	70	°C

1. I-AVDD = 2.8 V; IOVDD = 1.8 V ukusetshenziswa okujwayelekile kwamanje.
2. I-AVDD = 3.3 V; IOVDD = 3.3 V ukusetshenziswa okuphezulu kwamanje.
3. Ukuze uvimbele ukucisha kwe-thermal, izinga lokushisa lokuhlangana kufanele ligcinwe lingaphansi kuka-110°C.

Umfanekiso 1. VL53L7CX esukela module sensor

Izisekelo zokuklama ezishisayo

Uphawu θ ngokuvamile lusetshenziselwa ukuchaza ukumelana nokushisa okuyisilinganiso somehluko wezinga lokushisa lapho into noma impahla imelana nokugeleza kokushisa. Okwesiboneloampi-le, lapho idluliswa isuka entweni eshisayo (efana nokuhlangana kwe-silicon) iya kwepholile (njengemojula yezinga lokushisa elingemuva noma umoya ozungezile). Ifomula yokumelana nokushisa iboniswe ngezansi futhi ikalwa ngo-°C/W:

Lapho i-ΔT iwukukhuphuka kwezinga lokushisa le-junction kanye no-P ukuchithwa kwamandla.
Ngakho, ngokwesiboneloampi-le, idivayisi enokumelana nokushisa okungu-100 °C/W ibonisa umehluko wezinga lokushisa ongu-100°C wokushabalaliswa kwamandla okungu-1 W njengoba kulinganiswa phakathi kwamaphoyinti amabili okubhekisela.
Uma imojula idayiswa ku-PCB noma i-flex kusho ukuthi isamba sokumelana nokushisa kwesistimu yisamba sokumelana nokushisa kwemojuli kanye nokumelana nokushisa kwe-PCB noma ukuguquguquka ku-ambient/air. Ifomula imi kanje:

Kuphi:

• I-TJ izinga lokushisa lokuhlangana
• I-TA izinga lokushisa le-ambient
• I-θmod iyimojula yokumelana nokushisa
• I-θpcb ukumelana okushisayo kwe-PCB noma i-flex

Ukumelana nokushisa kwe-PCB noma i-flex

Izinga lokushisa eliphezulu elivunyelwe le-junction le-VL53L7CX ngu-100°C. Ngakho-ke, ekulahlekeni kwamandla okungu-0.43 W okusebenza ezingeni lokushisa eliphezulu elicacisiwe elingu-70°C (isimo esibi kakhulu), i-PCB ephezulu evunyelwe noma ukumelana nokushisa okuguquguqukayo kubalwa ngale ndlela elandelayo:

• TJ – TA = P × (θmod + θpcb)
• 100 – 70 = 0.43 × (40 + θpcb)
• 
• θpcb ≈ 30°C/W

Lokhu kunikeza isistimu ukumelana nokushisa okungu-70°C/W (θmod + θpcb).

Qaphela:
Ukuqinisekisa ukuthi izinga lokushisa eliphezulu le-junction alidluliwe futhi nokuqinisekisa ukusebenza kwemojula ephezulu, kutuswa ukuthi ungadluli ukumelana nokushisa okuhlosiwe okungenhla. Kusistimu evamile elahla u-216 mW, ukukhuphuka kwezinga lokushisa okuphezulu ngu-<20°C okunconywayo ukuze kusebenze kahle kakhulu kwe-VL53L7CX.

Isakhiwo nemihlahlandlela yokushisa

Sebenzisa imihlahlandlela elandelayo lapho uklama imojula ye-PCB noma i-flex:

• Khulisa ikhava yethusi ku-PCB ukuze ukwandise ukuguquguquka okushisayo kwebhodi.
• Sebenzisa imojuli ye-thermal pad B4 ekhonjiswe emfanekisweni 2. I-VL53L7CX pin out kanye nephedi ye-thermal (bheka imininingwane yedatha ye-VL53L7CX DS18365 ukuze uthole imininingwane eyengeziwe) wengeza ama-vias amaningi ashisayo ngangokunokwenzeka ukuze wandise indlela ezishisayo ezisebenza ngayo ezindizeni zikagesi eziseduze (bheka uMfanekiso 3. nangesincomo se-PCB).
• Sebenzisa ukulandelela okubanzi kuzo zonke izimpawu ikakhulukazi amandla kanye namasignali aphansi; landelela futhi uxhume ezindizeni zikagesi eziseduze lapho kungenzeka khona.
• Engeza ukucwiliswa kokushisa ku-chassis noma amafreyimu ukuze usabalalise ukushisa kude nedivayisi.
• Ungabeki eduze nezinye izingxenye ezishisayo.
• Beka idivayisi esimweni samandla aphansi uma ingasetshenziswa.

Umlando wokubuyekeza

Ithebula 2. Umlando wokubuyekeza idokhumenti

Usuku	Inguqulo	Izinguquko
20-Sep-22	1	Ukukhishwa kokuqala

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Amadokhumenti / Izinsiza

I-STMicroelectronics VL53L7CX Inzwa Yokuhamba Kwesikhathi Sokundiza [pdf] Incwadi Yeziqondiso I-VL53L7CX Inzwa Yokuhamba Kwesikhathi Sokundiza, VL53L7CX, Inzwa Yokushintsha Isikhathi Sendiza, Inzwa Yokuhamba Kwendiza, Inzwa Eshintshayo, Inzwa

Izithenjwa

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