110~120Vac Driver for two Bridgelux BXRA-56C1000-A-xx?

[Galane]

I have a couple of motion activated outdoor lights that have two Bridgelux BXRA-56C1000-A LED modules. The original circuit boards in the bases were not protected against weather. The motion sensors are a separate device that connects to AC and switched power to the LED circuit.

Space in the metal base is about 4.3" diameter by 1.5" deep.

Datasheet on the modules https://www.bridgelux.com/sites/def.../DS23-Bridgelux-ES-Star-Array-Data-Sheet1.pdf

All ratings at Tj = 25ºC except where noted.
Part Number, CCT & CRI, Current, Voltage, Power, Flux, Flux Tcase = 85ºC, Efficacy

BXRA-56C1000-A-xx, 5600K 70 CRI, 115, 25.3, 2.9, 395, 340, 136
BXRA-56C1000-A-xx, 5600K 70 CRI, 250, 26.5, 6.6, 850, 735, 128
BXRA-56C1000-A-xx, 5600K 70 CRI, 350, 27.3, 9.6, 1150, 1000, 120, <-Recommended use
BXRA-56C1000-A-xx, 5600K 70 CRI, 500, 28.4, 14.2, 1580, 1375, 111

The lights had no heat sink compound under the modules, completely bare against the interior of die cast housings. So I put some on, same non-coductive stuff I use on CPUs.

I happen to have two places ideal for these, front of my shop and under the roof by the back house door.

 

[Dave_H]

I have a couple of motion activated outdoor lights that have two Bridgelux BXRA-56C1000-A LED modules. The original circuit boards in the bases were not protected against weather. The motion sensors are a separate device that connects to AC and switched power to the LED circuit.

Space in the metal base is about 4.3" diameter by 1.5" deep.

Datasheet on the modules https://www.bridgelux.com/sites/def.../DS23-Bridgelux-ES-Star-Array-Data-Sheet1.pdf

All ratings at Tj = 25ºC except where noted.
Part Number, CCT & CRI, Current, Voltage, Power, Flux, Flux Tcase = 85ºC, Efficacy

BXRA-56C1000-A-xx, 5600K 70 CRI, 115, 25.3, 2.9, 395, 340, 136
BXRA-56C1000-A-xx, 5600K 70 CRI, 250, 26.5, 6.6, 850, 735, 128
BXRA-56C1000-A-xx, 5600K 70 CRI, 350, 27.3, 9.6, 1150, 1000, 120, <-Recommended use
BXRA-56C1000-A-xx, 5600K 70 CRI, 500, 28.4, 14.2, 1580, 1375, 111

The lights had no heat sink compound under the modules, completely bare against the interior of die cast housings. So I put some on, same non-coductive stuff I use on CPUs.

I happen to have two places ideal for these, front of my shop and under the roof by the back house door.

Some questions:

How are the LEDs driven, in series or parallel?

Do you know (or could measure on a good unit it possible) actual LED current, could be 350mA
(spec.) or lower?

Is anything (useful) marked on the driver?


Dave

 

[Galane]

They're in parallel. There's nothing measurable because the original PCBs were fried and got tossed ages ago. The only info I have is the part number and the datasheet.

 

[Dave_H]

So looks like you need a driver which covers around 27v, at 700mA or possibly lower, call it 20W or so. I don't have any specific suggestions. If you know the wattage rating of the lamp, work backwards to determine what LED current actually is; could be less than 350mA each.

From time to time I pick up low-cost (usually new)surplus ceiling lights with integrated LEDs (not bulbs) typically up to 15W, for as low as $2-$3 locally. One aim is to find re-usable drivers. Most are in the 20-40v range. Something like this may be a option. Some lights have removable modules, others have PCBs integrated into the enclosure (but removable). Smaller ones may have no separate driver, use linear current control on the LED PCB (up to about 10W level).

Drivers are usually not well marked if at all, need to do some measurement/calculation. A tricky area is figuring out the driver min./max.output voltage.

Dave