The ballast is broken, and I want to change to a DC switching power supply. Could you please tell me what voltage is appropriate?

ideahand

The ballast is broken, and I want to change to a DC switching power supply. Could you please tell me what voltage is appropriate? [Copy link]

I hardly used the Philips ceiling light, but it broke when I used it. I called 400 after two and a half years and they said there were no spare parts. It would be a pity to throw away such a big light. The output voltage of the ballast was not enough before, so the light would not light up, and only the night light would light up. After testing, the output voltage was only 24 volts. I took out the rectifier circuit board and accidentally burned it. With my skills, I can only modify the DC switching power supply to drive it directly. There are two outputs to control the white LED and the yellow LED respectively. By adjusting their voltages, the color and brightness of the light can be changed. There is a voltage prompt on the back of the rectifier. Each output shows 36 volts, but the maximum is 60 volts. If I use a constant current power supply, how many V is appropriate? Thank you for your guidance. I wanted to adjust the rectifier before, but I connected the multimeter probe to the power supply and burned the circuit board. The black one on top was burned later.

ideahand

Each road, 36-60. How to interpret it?

qwqwqw2088

In addition to the night light, are the LED lamp beads of the headlights checked normal?

When the voltage is normal, it mainly depends on how much current is supplied to the two white LEDs and the yellow LED.

Generally more than 200mA, it depends on the power of the lamp beads used.

ideahand

qwqwqw2088 posted on 2022-5-9 10:11 In addition to the night light, are the LED lamp beads of the headlights checked normal? Under normal voltage conditions, it mainly depends on how much current is supplied to the two white LEDs and the yellow LED...

The LED lamp beads are all normal. They can be lit up with an adjustable power supply of 32V before. Although it does not meet the minimum voltage of 36V, it is still lit. Because my adjustable power supply can only output up to 32V.

Now the cool air is completely gone.

I feel that the brightness is controlled by voltage.

The label says 32V to 60V, I don't know if a 48V Meanwell power supply is enough

qwqwqw2088

The voltage range is determined by the number of LED lamp beads in series. Generally, the working voltage of white light LED lamp beads is in the range of 2.8 to 3.5V.

Consider the constant current

If the brand lamps will indicate how much mA

32V to 60V, 48V is estimated to be able to light up, the best LED constant current power supply is Meanwell power supply

se7ens

This means that each output has 84 LEDs

Output voltage range 36~60v, current 0.96A, guess it is 21 series 4 parallel

That is to say, if you use an adjustable power supply, as long as it meets the voltage and current requirements, it is fine.