Dab tsi Core Advantages Ua kom muaj zog me meLED DownlightsSawv? MT7930-raws li tsav tsheb, Thaum tshav kub kub Dissipation & Performance Optimization!
Lub hwj chim me me LED downlight tau dhau los ua cov khoom tseem ceeb hauv thaj chaw, chaw ua haujlwm, thiab kev lag luam teeb pom kev zoo vim nws lub zog ua haujlwm, compact loj, thiab lub neej ntev. Nrog rau theem- tawm ntawm cov teeb ci ntsa iab thoob ntiaj teb, thov rau lub zog me me txhim khu kev qhaLED downlightkev daws teeb meem (xws li dimmable me me fais fab LED downlights thiab siab -PF me me fais fab LED downlights) txuas ntxiv nce. Tsab ntawv xov xwm no tsom mus rau 12W lub zog me me LED downlight tsim siv lub MT7930 tsav tsheb nti, ua raws li EEAT txoj cai los ntawm kev sib koom ua ke cov ntaub ntawv pov thawj, kev qhia tshwj xeeb, thiab kev coj ua zoo tshaj plaws hauv kev lag luam. Nws tshawb nrhiav cov ntsiab lus tsim, suav nrog kev teeb tsa kev tsav tsheb, kev daws teeb meem kub ntxhov, thiab kev ua raws li electromagnetic compatibility (EMC), muab tswv yim tswv yim rau cov teeb pom kev zoo engineers, manufacturers, thiab procurement professionals.
Dab tsi yog Core Driver Circuit Design ntawm Small -PowerLED Downlights?
Tus tsav tsheb Circuit Court yog qhov tseem ceeb ntawm lub hwj chim me me LED downlight, thiab MT7930 AC -DC integrated nti yog qhov tseem ceeb rau kev siv yooj yim, txhim kho lub zog siv hluav taws xob, thiab tau tsim- nyob rau hauv kev nyab xeeb nta uas yog qhov tseem ceeb rau kev ua tau zoo dua thiab kev vam khom.
MT7930 Chip Txheej txheem cej luam thiab Txoj Cai Ua Haujlwm
MT7930 yog ib qho -theem PFC LED tsav nti uas suav nrog kev tsim- hauv MOSFET thiab ntau qhov kev tiv thaiv Circuit Court, tsim tshwj xeeb rau kev siv hluav taws xob me me (txog 50 W). Cov txiaj ntsig tseem ceeb suav nrog
Simplified Circuitry: Cov khoom siv sab nraud tsawg tsawg txo PCB qhov loj thiab cov nqi tsim khoom, zoo tagnrho rau kev cog lus, me me -lub zog LED downlight enclosures.
Kev ua tau zoo PFC siab: Cov ua tau zoo - hauv PFC circuitry ua haujlwm nyob rau hauv ib txoj kev uas tam sim no ua raws li qhov voltage, ua tiav lub hwj chim (PF) ntawm 0.9 los yog siab dua.
Precise Constant Current Control: Ua kom muaj qhov tseeb tso zis raws li kev cai tam sim no, tseem ceeb rau kev ua kom pom tseeb ntawm LED teeb pom kev zoo thiab lub neej ntev.
Kev tiv thaiv zoo: Integrate overvoltage, overcurrent, short-circuit, thiab undervoltage lockout (UVLO) tiv thaiv, txhim khu kev ntseeg tau.
Lub nti lub pob 8-pin suav nrog cov pins ua haujlwm rau lub rooj vag tsav (DRV), qhov ntsuas tam sim no (CS), kev tawm tswv yim (DSEN), thiab pib muag muag (STP), raws li tau piav qhia hauv Table 1:
|
Pin Number |
Pin npe |
Muaj nuj nqi |
Cov Lus Qhia Tseem Ceeb |
|---|---|---|---|
|
1 |
DRV |
MOSFET rooj vag tsav tsheb |
Muab cov teeb liab tsav tsheb rau sab hauv MOSFET |
|
2 |
GND |
Hauv av |
Siv rau tag nrho cov teeb liab hluav taws xob |
|
3 |
TM |
Test pin |
Tshwj xeeb rau kev kuaj lub Hoobkas; sab laug ntab hauv daim ntawv thov |
|
4 |
COMP |
yuam kev amplifier tso zis |
Txuas lub capacitor rau GND rau zaus them nyiaj |
|
5 |
STP |
Pib mos |
Tswj lub sij hawm pib mos kom tsis txhob inrush tam sim no |
|
6 |
DSEN |
Tawm tswv yim voltage input |
Tau txais kev pabcuam winding tawm tswv yim los tswj cov zis |
|
7 |
VDD |
Fais fab mov |
Kev khiav hauj lwm voltage: 12V-16V |
|
8 |
CS |
Kev ntsuas tam sim no |
Kho cov zis tam sim no los ntawm cov resistor sab nraud; qhov voltage=2.2V |
Table 1: MT7930 Pin Configuration thiab Functions
Kev siv Circuit Court thiab cov ntsiab lus tseem ceeb
Lub zog me me LED downlight qhov hluav taws xob specifications yog
Tawm tswv yim voltage: 100V-240V AC (lub ntiaj teb no compatibility)
Cov zis hluav taws xob: 12W (12 × 1W LEDs hauv series)
Cov zis tam sim no: mA (tsis tu ncua)
Tswj tam sim no tsis tu ncua
Cov zis tam sim no (ILED) yog tswj hwm los ntawm CS (pin 8) thiab DSEN (pin 6) pins, suav nrog cov qauv ILED=21 × NSNP × R4VFB, qhov twg
NP= Thawj winding lem ntawm lub transformer
NS=Secondary winding lem
VFB= Internal reference voltage (400 mV)
R4=Tam sim no sensing resistor (txuas rau tus pin 8)
Cov qauv no ua kom lub zog me me LED teeb pom kev ruaj khov tam sim no tso zis (± 3% kam rau ua) hla cov khoom siv hluav taws xob hloov pauv, tiv thaiv LED flicker thiab lub teeb lwj.
Mechanisms tiv thaiv
Kev tiv thaiv overvoltage (OVP): Triggered yog tias DSEN tus pin voltage tshaj 3.2V (3 lub voj voog sib law liag) lossis VDD tus pin tshaj 19.2V. OVP qhov pib raug xam raws li VO−OV=3.2×(1+R6R5). ×NA NS−VD8(NA=Pab winding tig; VD8=Forward voltage ntawm cov zis rectifier diode)
Kev tiv thaiv overcurrent (OCP): Shuts down the gate drive if the CS pin voltage is >2.2V, tiv thaiv kev puas tsuaj los ntawm cov khoom siv tam sim no.
Luv -Circuit Protection (SCP): Qhib yog tias DSEN tus pin voltage yog<200 mV for 640 μs, restarting automatically once the fault is resolved.
EMC Lim Circuit Court
Electromagnetic cuam tshuam (EMI) yog suppressed los ntawm ib tug input lim network (Daim duab 3 nyob rau hauv thawj daim ntawv), uas muaj xws li:
X-capacitor (CX1, 0.1 μF/275 volts): Txo qhov sib txawv-mode cuam tshuam.
Common-mode inductor (L1, 2 mH): Blocks common-hom cuam tshuam nrog siab impedance.
Bleeder resistor (Re, 1KΩ): Tshem tawm qhov hluav taws xob capacitor thaum fais fab tuag, ua kom muaj kev nyab xeeb.
Qhov kev tsim no ua kom lub zog me me LED downlight ua raws li GB17743 thiab CISPR 22 tus qauv, nrog kev cuam tshuam tsawg dua lossis sib npaug li 40 dBμV.
Yuav ua li cas Optimize Thaum tshav kub kub Dissipation rau me zogLED Downlights?
Thaum tshav kub kub dissipation ncaj qha cuam tshuam rau lub neej ntev thiab kev ua haujlwm ntawm lub zog me me LED downlights -txawm tias qis- lub zog LEDs tsim cov cua sov uas tuaj yeem nce qhov kub thiab txias (Tj), ua kom lub teeb tawg thiab nti tsis ua haujlwm.
Thaum tshav kub kub Generation Mechanism
LEDs hloov tsuas yog ~ 20% ntawm hluav taws xob hluav taws xob rau hauv lub teeb; qhov seem 80% yog tso tawm raws li cua sov. Rau lub zog me me 12WLED downlight, ~ 9.6W ntawm tshav kub yog tsim los ntawm PN hlws ris. Tshaj Tj ( Ntau dua lossis sib npaug li 120℃) txo cov luminous flux los ntawm 30% thiab lifespan los ntawm 50%, raws li qhia hauv daim duab 4 (cov ntaub ntawv qub).
Thaum tshav kub kub Dissipation Solution
Tus tsim txais yuav ib tug peb -theem cua sov dissipation system tailored rau me me fais fab LED downlights:
LED Substrate: Lub hauv paus tuab aluminium uas ua kom sov zoo (thermal conductivity Ntau dua lossis sib npaug ntawm 2.0 W / (m·K)) nrog cov ntawv ci tooj liab tuab (Ntau dua lossis sib npaug li 35 μm
Thermal Interface Material (TIM): Epoxy resin doped nrog ceramic fillers (thermal conductivity Ntau dua los yog sib npaug rau 1.5 W / (m·K)) bonds aluminium substrate rau lub dab dej kub, txo cov thermal kuj.
Heat Sink: Lubaluminium alloy finned cua sov dab dej (qhov hnyav Tsawg dua lossis sib npaug li 100 g) ua rau thaj tsam convection los ntawm 3 × piv rau cov chaw tiaj tus. Cov fins yog qhov sib nrug ntawm 5 mm sib nrug los pab txhawb cov huab cua ntws, uas txhim kho ntuj tsim.
Kev tsim vaj tsev rau cua sov Dissipation
Lub zog me me LED downlight vaj tsev siv PC (polycarbonate) cov khoom siv rau lub teeb - kis tau tus mob (kev xa tawm Ntau dua lossis sib npaug li 85%) thiab aluminium alloy rau lub cev loj:
PC npog: Diffuses lub teeb kom txo qis glare, nrog rau kub tsis kam mus txog 135 degree.
Aluminium alloy lub cev: Ua raws li cov khoom siv hluav taws xob thib ob, hloov cov cua sov los ntawm lub dab dej finned mus rau lwm qhov chaw.
Kev ntsuam xyuas tau lees paub tias tom qab 4 teev ntawm kev ua haujlwm tas mus li (25℃ambient kub), lub zog me me LED downlight qhov sib txuas qhov kub yog tsawg dua lossis sib npaug li 85 degree, zoo hauv qab qhov tseem ceeb ntawm 120 degree.
Dab tsi yog Kev Ntsuas Kev Ua Haujlwm ntawm 12W Lub Hwj Chim MeLED Downlight?
Kev sim ua tiav siv cov cuab yeej tshaj lij (cov khoom siv hluav taws xob ntse ntsuas ntsuas, EMC tester) validates lub hwj chim me me LED downlight qhov kev ua tau zoo, nrog cov txiaj ntsig kev sib ntsib lossis tshaj cov qauv kev lag luam.
Hluav taws xob Performance
Table 2 piav qhia cov txiaj ntsig ntawm kev ntsuas hluav taws xob tseem ceeb:
|
Parameter |
Kev Xeem |
Kev lag luam Standard |
Qhov zoo |
|---|---|---|---|
|
Lub zog nkag |
13.4W |
Tsawg dua los yog sib npaug rau 15W (rau 12W tso zis) |
High conversion efficiency |
|
Input Tam sim no |
72 mA (220V AC) |
Tsawg dua lossis sib npaug li 80mA |
Kev siv hluav taws xob tsawg |
|
Lub zog Factor (PF) |
0.927 |
Ntau dua lossis sib npaug li 0.85 |
Txo reactive zog poob |
|
Tag nrho Harmonic Distortion (THD) |
9.2% |
Tsawg dua lossis sib npaug li 15% |
Minimizes daim phiaj cuam tshuam |
|
Tso zis tam sim no Stability |
±2% |
±5% |
Ib txwm LED ci ci |
Table 2: Cov txiaj ntsig ntawm Kev Ntsuas Hluav Taws Xob
Optical thiab Reliability Performance
Luminous Efficiency: 115 lm / W (12W input, 1380 lm output), 30% siab tshaj 12W CFL downlights (88 lm / W).
Xim Rendering Index (Ra): Ntau dua lossis sib npaug rau 85, kom ntseeg tau tias muaj tseeb -rau - lub neej xim luam tawm.
Lub neej ntev (L70B50): 50,000 teev, 5 × ntev dua CFL downlights (10,000 teev).
Kev ua raws li EMC: Kev cuam tshuam tsawg dua lossis sib npaug ntawm 38dBμV (30MHz-1GHz), ntsib CISPR 22 Chav B.
Sib piv Advantage
Table 3 piv rau 12W lub zog me meLED downlightnrog ib txwm 12W CFL downlight:
|
Performance Indicator |
Lub zog me me LED Downlight |
CFL Downlight |
Kev txhim kho |
|---|---|---|---|
|
Lub teeb pom kev zoo (lm / W) |
115 |
88 |
30.7% |
|
Lifespan (teev) |
50,000 |
10,000 |
400% |
|
Hwj chim Factor |
0.927 |
0.58 |
59.8% |
|
THD |
9.2% |
25% |
63.2% |
|
Ua kom sov- Sijhawm nce |
Instant (tsawg dua lossis sib npaug rau 0.1s) |
30s |
N/A |
|
Cov ntsiab lus Mercury |
ua omg |
5mg ib |
Ib puag ncig tus phooj ywg |
Table 3 nthuav qhia qhov kev sib piv ntawm LED downlight thiab CFL downlight.
Cov teeb meem kev lag luam thiab kev daws teeb meem rau lub zog me meLED Downlight
Tej Teeb Meem
Cov zis tsis ruaj khov tam sim no lossis tus qauv tsav tsheb tsis zoo tuaj yeem ua rau flicker.
Cov cua kub tsis txaus ua rau overheating thiab shortened lifespan.
Tsis tshua muaj hluav taws xob zoo thiab siab THD ua rau muaj kev cuam tshuam hauv daim phiaj.
EMC tsis yog -kev ua raws cai ua rau muaj ntawv pov thawj ua tsis tiav.
Kev daws teeb meem (200 lo lus)
Txhawm rau daws qhov flicker, siv MT7930-raws li cov tsav tsheb nrog kev tswj xyuas tam sim no meej (± 2% kam rau ua) thiab xyuas kom cov khoom tso tawm tam sim no. Rau overheating, txais yuav aluminium substrates (thermal conductivity Ntau dua los yog sib npaug rau 2.0 W / (m·K)) thiab finned cua sov dab dej, tsis txhob muab cov vaj tse nyob. Txhawm rau txhim kho lub zog muaj zog thiab txo THD, xaiv cov tsav tsheb uas tsim tau- hauv PFC (PF Ntau dua lossis sib npaug li 0.9) zoo li MT7930, zam qis- nqi tsis yog-PFC tsav tsheb. Rau kev ua raws li EMC, integrate X-capacitors, common-mode inductors, thiab bleeder resistors nyob rau hauv lub input circuit, thiab xyuas kom meej PCB kab sib nrug ntau dua los yog sib npaug rau 2 hli rau siab -voltage paths. Yog hais tias lub zog me me LED downlight tsis pib, kos VDD voltage (12V{24}}16V) thiab pib hluav taws xob muag; hloov tus tsav tsheb yog tias cov txheej txheem tiv thaiv tau rov ua dua. Kev saib xyuas tsis tu ncua, xws li ntxuav cov plua plav los ntawm cov dab dej kub (uas txo cov cua sov kom zoo los ntawm 15%), kuj tseem khaws kev ua haujlwm. Ib txwm siv cov khoom pov thawj (xws li UL- npe capacitors, RoHS-raws li LEDs) kom ntseeg tau.
Cov ntaub ntawv pov thawj
MeiXinSheng Technology. (2023).MT7930 Daim Ntawv Teev Npe: Ib qho -Theem PFC LED Tsav Chip. https://www.maxictech.com/product/mt7930
International Electrotechnical Commission (IEC). (2021).IEC 61347-2-13 Cov Lus Qhia Tshwj Xeeb rau Ballasts rau LED Modules. https://webstore.iec.ch/publication/25959
Tuam Tshoj National Standard. (2013).GB 17743-2017: Kev txwv thiab cov txheej txheem ntawm kev ntsuas xov tooj cua cuam tshuam cov yam ntxwv ntawm hluav taws xob teeb pom kev zoo thiab cov cuab yeej zoo sib xws. https://openstd.samr.gov.cn/bzgk/gb/newGbInfo?hcno=057C5666466B45F9E27644656E656E496E666F
Zhang, D., Luo, Y., & Qin, H. (2013). Tsim ib lub zog me me LED Downlight.Suav Journal of Electron Devices, 36(2), 173-176.
Li, H., Yu, Y., Liu, X. (2009). Kev tshawb fawb ntawm Humanized tsim ntawm LED Toj roob hauv pes teeb pom kev zoo.IEEE 10th International Conference on Computer-Aided Industrial Design & Conceptual Design, 499-502.
Cha, S., Park, D., Lee, Y. (2012). AC/DC Converter Dawb LED tsav tsheb rau teeb pom kev zoo.2012 IEEE International Conference on Consumer Electronics, 706-708.
Sau ntawv
Lub zog meLED Downlight: Ib qho LED downlight nrog cov zis hluav taws xob tsawg dua lossis sib npaug ntawm 20W, tsim rau thaj chaw, chaw ua haujlwm, thiab teeb pom kev lag luam.
PFC (Power Factor Correction): Ib lub tshuab uas txhim kho qhov sib piv ntawm lub zog ua kom pom tseeb, txo cov hluav taws xob pov tseg thiab kev cuam tshuam ntawm daim phiaj.
EMC (Electromagnetic Compatibility) yog hais txog lub peev xwm ntawm cov khoom siv hluav taws xob ua haujlwm yam tsis muaj kev cuam tshuam lwm yam khoom siv lossis kev cuam tshuam rau sab nraud.
Junction Temperature (Tj ): Qhov no yog hais txog qhov kub thiab txias ntawm PN kev sib tshuam ntawm LED nti, uas cuam tshuam nws txoj sia thiab kev ua haujlwm luminous.
L70B50 Lifespan: Lub sijhawm tom qab ntawd 50% ntawmLED downlightskhaws 70% ntawm lawv thawj luminous flux.
THD (Tag nrho Harmonic Distortion): Ib qho kev ntsuas ntawm qhov kev hloov pauv tam sim no, nrog cov nqi qis dua qhia tau zoo dua kab sib chaws.
DCM (Discontinuous Conduction Mode): Ib hom kev khiav hauj lwm uas inductor tam sim no poob rau xoom thaum lub sij hawm hloov txhua lub voj voog, simplifying PFC tsim.
Koj puas xav kom kuv tsim ibcov ncauj lus kom ntxaws tsav tsheb circuit schematicrau MT7930-raws li me me fais fab LED downlight los yog tsim ib tugkev txheeb xyuas tus nqimuab piv nrog cov tsoos CFL downlights?
https://www.benweilight.com/lighting-tube-bulb/15w-bathroom-downlights.html
Shenzhen Benwei Teeb pom kev zoo Technology Co., Ltd.
