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wiring new PSU to a flickering LED lamp

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smile:
Hello, I have this LED lamp module, image attached.

Module parameters

voltage 175.4V
total current 26mA
manufacturer specified wattage 5.5W
led amount 16pcs


I have bought this PSU for LED that had similar wattage.

Product Name: 4-7W built-in bare board LED constant current drive power
Connection:
RED / Led + LED: Positive Output
White / Led-LED: Negative Output
PIN: Power Input
PIN: Power Input
Input voltage: 85-265V
Output voltage: 12-25V
Output current: 290mA ± 5%
Product size: 34 * 17 * 16MM
Note: This driver uses a professional chip, the output voltage will be based on the lamp beads automatically adjust the voltage, the circuit with over-current protection, short circuit protection, open circuit protection.

The question is how to properly wire it?

JS:
If your parameters are true those two pieces arent compatible, you need a PSU which delivers the current you want up to the voltage you need or higher.

JS

JS

Twoflower:
That will be hard to implement. Even re-wiring the LED module will probably not work with that supply.

The LED emitter has 16 LEDs and need a current of 26mA all in series. But the voltage looks a bit odd, 175V/16 = 11V per LED. It seems that each transmitter has 3 LED chips in series in one package.

Nevertheless your supply is a constant current source. It tries to drive 290mA. Because this higher current the output voltage is much lower (12...25V). That is far too high for one LED (26mA), so you need to put some in parallel. So 290mA/26mA = 11,1. So you need to connect 11 or 12 LEDs in parallel. But with the calculation above the minimum voltage of 12V of the supply one LED (assuming the 11V is correct) that's not going to work. You need some additional resistor. And you can't get all 16 LEDs active that way.

A simpler solution is probably either using a matching supply or a different module.

jose347:
From where do you plan wiring this lamp? mains? where did you get it from? what I understand from what you have is that you got a DC load(led module), and a AC to DC (PSU module), and if this was the case, you may have problems because from the specs you provide the output voltage will not be enough to power the leds. It will go like this say you are in america your mains will output a ~120Vac, this will go to the input of your PSU polarity at this point can be ignored if you happen to have a third wire then this will be your chassis ground(place on the metal base of your lamp) then from your PSU output (12-25V DC) you will connect the positive with the positive of your leds and negative with negative. problem here is that those 12-25Vdc will need to be 175Vdc to power the leds. but then again that really depends from where you plan powering the lamp and from where do you got your led module.

smile:

--- Quote ---bare board LED constant current driv
--- End quote ---

This is Mains AC 230V LED lamp. It is new high CRI lamp, and it was quite cheap not like some online for 10 to 15Eur.
The problem is that PSU used in this lamp flicker very much, that is why I want to use new PSU.


--- Quote ---The LED emitter has 16 LEDs and need a current of 26mA all in series. But the voltage looks a bit odd, 175V/16 = 11V per LED. It seems that each transmitter has 3 LED chips in series in one package.
--- End quote ---

What is strange is that :

26mA is used by 16LEDS when voltage is 175V AC
Then 175 / 16 = 11V (looks like 3Leds in single led chip)
But then it gets even more stange is that 26mA / 16 = 1.625mA

So a single LED chip needs 11V and 1.6mA of current when my PSU is

Output voltage: 12-25V
Output current: 290mA ± 5%

But then I never seen LED lamp PSU with such low current or such low current LEDs for that matter.

290mA by PSU / 1.625mA = 178LEDS (Free energy anyone :-//)

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