LED Driver replacement

Thread Starter

mveras1972

Joined Dec 19, 2020
3
I installed recessed lights I purchased on Amazon 4 years ago and the LED drivers included with the lights are poor quality. Several of them have failed and I need to find replacements for the LED drivers. The picture below is what the bad LED driver looks like. I cannot find this driver alone on Amazon. They sell the LED light bundled with the driver. Can I buy a driver like this from a compatible maker? What driver specifications am I looking for so that it works with the lights I have?


KM7LFIahTVePm5aTgRZMPA.jpeg
 

bassbindevil

Joined Jan 23, 2014
147
It looks like this driver is compatible with regular light dimmers: is that a feature you need? That doesn't seem to be a common option.
Apart from that, look for a driver with a current around 300 mA and that can maintain constant current over that voltage range (24 to 42V). It would be helpful to measure the voltage across a working fixture, in case there are drivers with different voltage ranges that might be compatible.
Here's one (the 10 watt version) that isn't dimmable, but does 300 mA at 22 to 38V:
https://www.banggood.com/AC85-265V-...ert-LED-Driver-for-Flood-Light-p-1367439.html
And a 12W thing:
https://www.banggood.com/AC85-265V-...nt-for-Floodlight-Ceiling-Lamp-p-1367454.html
 

Thread Starter

mveras1972

Joined Dec 19, 2020
3
It looks like this driver is compatible with regular light dimmers: is that a feature you need? That doesn't seem to be a common option.
Apart from that, look for a driver with a current around 300 mA and that can maintain constant current over that voltage range (24 to 42V). It would be helpful to measure the voltage across a working fixture, in case there are drivers with different voltage ranges that might be compatible.
Here's one (the 10 watt version) that isn't dimmable, but does 300 mA at 22 to 38V:
https://www.banggood.com/AC85-265V-...ert-LED-Driver-for-Flood-Light-p-1367439.html
And a 12W thing:
https://www.banggood.com/AC85-265V-...nt-for-Floodlight-Ceiling-Lamp-p-1367454.html
Thank you, but I don't need the dimming function. I will need to measure the voltage the driver is sending out. I don't understand why it presents a voltage range rather than a specific voltage. Is that because the dimming is done by changing the voltage from 24 to 42V? In that case, I would just need something that outputs the max voltage which is 42V. I will measure a working fixture when I get a chance. The LED lights are 12W.

Calculating 12 Watts / 42 Volts = 0.287 Amps. So I guess something that can output 300mA will be fine.

Also, I don't understand what the Ta and Tc values mean. Is that something I should consider when shopping? And finally, what does "Triac" mean?
 
The drivers specify a voltage range because the actual voltage across a string of LEDs can vary with temperature and the number of LEDs in series. Dimming is probably done by varying the duty cycle, not by reducing voltage or current. That means the power to the LEDs is switched off very briefly at a rate too fast for our eyes to perceive. If you reduce the current through a white LED, the color temperature of the LED will change (color temperature is like the difference between yellowish warm white and bluish cool white), but by turning the LED on for briefer periods, the brightness is reduced while keeping the color temperature constant.
 
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