20W DoB CCC Brand Review

LED lamp brightness should be tested with specific instruments that measure light intensity in lumens and power consumption with a watt meter. Dividing these two yields a value known as lumens per watt (Lm/W), which is used to compare LEDs. It implies that the better the LED, the less power it consumes and the more light it generates. Unfortunately, I lack this equipment, and I only evaluate the electrical properties of LEDs and their drivers. Although it is not a comprehensive evaluation, it may be valuable for certain individuals because I have not seen these reviews elsewhere. On the other hand, many low-cost LEDs on the market lack a true nominal power rating.

I’ve got a 20-watt DoB LED that I’d want to put to the test. DoB stands for Driver On Board, indicating it does not require a separate driver and is powered directly by the mains. These DOBs have capacitors, and their advantage over those without capacitors is that they are a form of Buck Converter, which means these types reduce the filtered DC voltage from the diode bridge. Because of this, the LEDs are on most of the time (unlike linear ICs, which are only on at the peak), and as a result, they have low flicker. The flickering of the light in these DoB types is so minimal that they claim there is none; this is not entirely correct. Using a Buck converter for AC-to-DC conversion results in lower heat output and a longer life. According to Chinese dealers, the single-capacitor type lasts 1 year, and the two-capacitor type lasts 2 years.

Specifications of this type of LED:

Input power: 160-230 AC

Nominal power: 20 watts

If you look at the LED, CCC is written, which seems to be the brand of the device.

This driver’s IC is DP9511, which, according to my measurements, is most likely the DP9511M IC if you look at the translated datasheet.

When the temperature reached equilibrium in 2 minutes, the AC wattmeter read 14.3 watts. The current on the DC side of the circuit reached 110 mA. As can be seen, the voltage was nearly 124. (To test the current, I attached an inductor base to an ammeter in series.) The power factor, on the other hand, was 0.62 due to the driver’s Buck Converter circuit and the circuit’s capacitor.