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Questions tagged [cob]

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0
votes
1answer
45 views

Driving 8 x 117W COB LEDs

I am currently attempting to design a LED grow light using the following LEDs but I am having a very hard time finding a sufficient power supply. 8 x Lumileds - SunPlus CoBs DataSheet 51.7 V, ...
0
votes
2answers
51 views

Connect VGA cooling fan (12vdc - 0.1A) to constant current driver (120Vac to 12- 22vdc @ 0.3A)

I have an AC driven COB LED which can be connected directly to the AC main in house (120v). I would like to attach a cooling fan to the COB which requires 12vdc @ 0.1A. I have a constant current ...
0
votes
0answers
25 views

LED COB, Meter reading voltage on isolated backplane when powered

I'm setting up a project lamp for my workbench using one of these LED COB I checked for continuity while doing a test setup, the live and neutral connectors are isolated from each other, and the ...
7
votes
2answers
1k views

How to manufacture chip on board?

I am a developer of a cheap product and i have no experience in mass production. Device is fully functional and represents a single sided PCB, a microcontroller, a bunch of diodes and a few passive ...
0
votes
1answer
370 views

COB LED Dimming via Poentiometer?

I want to create a dimmer for high power LED light's i'm building for video work. I'm using CREE CXB3590 chips, which have run at 36V with a forward current of 3.6A. I am powering these through a 150W ...
0
votes
0answers
41 views

Two DC power circuits sharing one lead

I am currently building a COB LED lighting system for my plants. The COBS are Japanese Citizen 34V, and the fans for the heat sinks for each of my COBs are 12V. I was planning on using individual ...
0
votes
2answers
280 views

Overcurrent Protection for COB Leds wired in parallel powered by Const Voltage Mean Well Driver

Roughly this is my current wiring diagram. The Mean Well driver that I am using is the HLG-185H-36B. Output 36v DC, max current 5.2A. The Cobs are 36V and have a max operating current of 2.76A, ...
0
votes
1answer
715 views

Driving a COB LED, Max Current that can be Applied

I am using Luminus COB with the rating given as Maximum power 65W and typical power 29W. At 800mA the power I would get is 29W while at 1600mA it is 65W. When I connect it to a power supply of ...
-1
votes
1answer
128 views

COB LEDs for Flood Light

I am using luminus CXM-18 COB. The specifications in the Data Sheet read a minimum current of 800mA and max 1550mA at 800mA the power I get will be 29W and at 1550mA it is 65W while the voltage is ...
0
votes
3answers
464 views

3W 12V COB LED with 12V Campervan system

I have an LED downlight in the camper we just bought but unfortunately the module inside is dead. I would like to replace it with another LED module/chip for cheap. The light we have: http://www.pro-...
1
vote
1answer
646 views

Powering COB LED with “under-voltage” LED driver

I have LED Driver Model: LD-361500-105MPF Input: 90-260VAC 50/60Hz and Output: 20-36VDC, 1500mA+/-5%. I connected it to the LED COB Citizen 1212C4 which needs, according to datasheet (COB's ...
2
votes
3answers
440 views

Do COB LEDs usually need electrically insulating from the heatsink?

I have some Vero series LEDs from Bridgelux. I want to put multiple LEDs on 1 heatsink. I was planning to use thermal epoxy, so there is the possibility of the aluminium base of the LED touching the ...
3
votes
2answers
295 views

ACF to mount bare die?

I've been learning about ACF for doing a chip-on-board application, but I'm having a little trouble finding enough information about it. My main questions are: How is alignment done for very fine ...