LED is a highly efficient light-emitting diode device, it must work in the DC constant current environment in order to continue to send a bright light, light the world. And drive the power of the pros and cons will directly affect its luminous brightness and light quality. How to use a good LED filament drive power is the key to the manufacture of cost-effective LED filament light.
The current use of LED filament drive power there are three:
1. will soon be out of the RC capacitive power supply;
2. The current mainstream non-isolated switch constant current drive power;
3. Emerging high-voltage linear constant current drive power.
The current mainstream LED filament lamp products are C35 candle lights and A60 bulb, they can install the drive power space is very small.
LED filament light development early, only in the glass bulb and the lamp between the increase of an annular plastic parts to expand the space can accommodate the power module; with a new generation of LED filament dedicated drive power chip come out, many LED drive power necessary protection Are concentrated into the chip inside, their application circuit is more concise, the application of the circuit around the parts more scarce, further reduce the cost of production.
Today, a new generation of smaller space to drive the power supply chip and the program can meet the requirements of the lamp without plastic parts.
At present, the world's grid voltage varies, many countries have two different grid voltage at the same time and use, such as the United States, Canada, Mexico, Japan, Brazil, Vietnam, the grid voltage from AC100V-240V, This requires the power of the filament lamp to be AC100V-240V input voltage.
The operating voltage and current of the filament lamp are DC150V / 10-30mA. Therefore, the power supply is designed to be boosted by different input voltage range (input AC90-130V), step-down (input AC180-265V), automatic lift Pressure (input AC90-265V) three different modes to accommodate different grid voltages.
The main parameters of the main products of the lamp light drive power supply:
1, candle light power: 2W, 3W, 4W; output voltage of DC150V, the output current of 10-12mA, 14-15mA, 20-22mA;
2, the bulb power: 2W, 4W, 6W, 8W; output voltage of DC150V, the output current of 10-12mA, 22-24mA, 33-36mA, 44-48mA.