- LED Driver 450mA (Constant Current Output) 39V-83V Power Supply

I used this to repair an older led pole light. I think they are still being sold here under the name Torchstar. It has a good cast aluminum case that kept water out fine, so I'd like to keep it around. The original driver stopped working, and there were a few individual chips burnt out. Took me a lot of probing and checking to determine the way the leds were in the circuit. No information on the original driver. For this light, it was 75 leds, three parallel branches of 25 leds each. So around 75v drop and 450ma driving the three branches seemed about right. After replacing about four chips last night I hooked it up to the driver and it came on fine and all chips were on. Today I wired everything back into the lamp, cleaned off the old heat transfer paste, put new paste on, and put the repaired panel back into the lamp. I put power back on it, and it came on great again. Then it shut off after a few seconds. Then it came back on for a couple seconds. Then back off. Strobing. Great. I didn't have it on much last night and kicked myself for not just plugging it in for 10 min today to check it before I put it together with the heat transfer paste that is incredibly messy. I thought the new driver was not handling all the leds; and cutting out and back on. Miffed, and wondering about a return or if it was worth checking the voltage on it, I was about ready to chuck the whole thing into scrap metal. I then had another thought. Couldn't be that simple. I held my hand over the light sensor and plugged it back in. The board came on. And stayed on for 5 min. I took my hand off the sensor, a couple seconds later the light shut off. Then a couple seconds after that it came back on again. So DIY'ers, remember that dusk to dawn sensor that you cleaned up and checked weeks ago and made sure it worked? Well as luck would have it, it still works when you wire it back into the circuit. The light was coming on, bouncing around the white walls of my office, and then tripping the light sensor. Then the room, still lit but not bright enough apparently, would be dark enough to turn it back on and start the cycle all over. The driver works fine; fits good in that lamp I mentioned. No idea what kind of longevity it will have. I will probably keep this as a spare. Happy now.

I need to power an LED load that drops 38.6V at 450mA. I tried the supply that produces 21-43V and it burned up after 6 months of use. The PCB says 20W and it was dissipating about 17.4W. I bought the larger supply that has a voltage range of 39-83V. I added more LEDs to get the voltage to 41V, however this supply doesn't begin working till 49V not 39V as specified!!!

I bought 3 full spectrum 225 LED grow light panels from Banggood for what I thought was a great deal. It turns out the panels were fine, you can find them here on Amazon. The supplied drivers were junk though. I'm a natural skeptic so I checked over my bargain lights and noticed the supplied drivers were snap together, not a single screw. So I plug them in and get my non contact thermometer. Within 2 minutes they exceeded 180*F. I place the drivers in ceramic pots, as to avoid a fire, and ran them. Inside of 2 weeks all had failed. These Chanzon drivers are great! I matched the specs to my panel and these have been flawless. I took them apart and the construction is very robust. Thick circuit board, large high temp capacitors, very pleased. I haven't measured temps since they barely feel warm to the touch. 3 drivers running 16 hours a day for a few months and flawless performance. As a side note people can't follow instructions. You can only measure operating voltage of a LOADED circuit with a constant current driver.

1st one bad and replacement is bad. Not even close to the actual rating.