How to select drive power for LED filament lamp?

Time:2018-10-18 Views:350

LED is an efficient light-emitting diode device, which must work under constant dc current in order to continuously shine bright light and illuminate the world.The quality of the driving power will directly affect its luminance and quality of light.How to select a good LED filament drive power supply is the key to produce high cost performance LED filament lamp.

Currently, there are three types of driving power supply using LED filament lamp:

The first is the resistance capacity and step-down power supply to be eliminated.

The other is the current mainstream non-isolation switch constant current drive power supply;

Third, the new high - voltage linear constant - current drive power.

At present, the main products of LED filament lamp are C35 candle lamp and A60 bulb lamp.

In the early stage of LED filament lamp development, only a circular plastic part is added between the glass bubble and lamp holder to expand the space that can accommodate the power module;With the advent of the new generation of LED filament lamp dedicated drive power chip, many necessary protection functions of LED drive power are concentrated into the chip interior, their application circuit is more concise, the parts around the application circuit are more scarce, and the production cost is further reduced.

Today, the new generation of smaller space occupied drive power chips and solutions can meet the requirements of filament lamp non-plastic parts.

At present, the grid voltage of various countries in the world is different, and many countries have two different grid voltages at the same time, such as the United States, Canada, Mexico, Japan, Brazil, Vietnam, etc., the grid voltage is from ac100v-240v, with a large span, which requires the power supply of filament lamp to be applicable to the input voltage of ac100v-240v.

The basic requirements of the working voltage and current of the filament lamp are DC150V/ 10-30ma. Therefore, the power supply is designed into three different modes according to different input voltage ranges: step-up (ac90-130v), step-down (ac180-265v), and automatic rising and dropping (ac90-265v) to adapt to different grid voltage.

General parameters of main product drive power of filament lamp:

1. Power of candle lamp: 2W, 3W, 4W;The output voltage is DC150V, the output current is 10-12ma, 14-15ma and 20-22ma.

2. Bulb lamp power: 2W, 4W, 6W, 8W;The output voltage is DC150V, the output current is 10-12ma, 22-24ma, 33-36ma, and 44-48ma.