CFL lamps of the "green" design strategy

Access to the mass market has begun to favor the two products are compact fluorescent lamps (CFL) and LED lights. Both can provide the above advantages, but this article will focus on CFL technology, we have to analyze the Chinese manufacturers of white lions (Baishi) production of a non-dimming CFL lamps.

Spiral CFL was first recognized by the father of modern fluorescent technology Edward E. Hammer launched in 1976. While this design has been great improvement compared with the incandescent, but at the time, the boss of General Electric Company, and not adopted. CFL with electronic ballast Osram (Osram) launched in 1985, but until 1995 CFL lamps began commercial production.

To know why the CFL 20W and 75W incandescent lamps to produce the same brightness, this need to understand the composition of each component CFL lamps. Like other fluorescent lamps, which use the U-shaped glass tube CFL, tube wall coated with phosphor, when faced with the tube of ionized gas will produce visible light when ultraviolet radiation.

In order to achieve the size of the market for home, CFL glass tube design generally use a smaller diameter, and bend with straight or spiral structure, collapsed. Lamp electronic ballast for the light to take full account in the design of a standard lamp screw socket space constraints. To achieve this design, you need to use the size reduction of the power to create a relatively small area of ​​the right lamp drive.

Covered with a phosphor coated glass tube in the manufacture of U-has its own history, but the chemical engineering enthusiasts may be more interested in this history. From a consumer point of view, the phosphor coating inside the tube the loss is a major problem. Nevertheless, the high-quality CFL lamp life can still be several months or even years.

CFL lamps in observing this special time, another noteworthy case in the holder has a through hole. This hole suggests that the ballast and cooling of electronic components on the loss of lamp life is also a factor.

Typical electronic ballasts contain a small circuit board, this board is to allow consumers to easily replace incandescent lamps with CFL lamps. Open the CFL lamp electronic ballasts provide energy to enhance the initial, and then limit the current work used the value of the rated lamp.

Ballast design using transistors, diodes and many capacitors, inductors, these devices first rectified AC power, and then create a resonant inverter circuit followed by the high frequency high voltage power supply circuit for CFL lamps lit. In this electronic ballast, one of the most important components NXP CFL half-bridge structure driver chips UBA2211.

UBA2211 input from 110VAC or 220VAC high voltage drive the CFL 25W lamp, which features the use of CFL in any modern electronic ballast is necessary. However, UBA2211 one of the main advantages is its over-temperature protection circuit includes (OTP) and the capacitive mode protection (CMP) functions. OTP and the CMP to monitor voltage, current and power consumption, and under normal conditions to ensure the right of non-closed system, in the life of some of the end of combustion are safely handled. CFL start in the first power "improve" stage, UBA2211 also provide saturation current protection (SCP) feature to be able to work in the saturation current CFL limit, will not damage the power transistors in electronic ballast.

We are in the CFL, noted the complexity of dismantling the power circuit, but also understand why the CFL to a place in the market, and (relative) price of short-lived compared to incandescent, and now to the ordinary consumers of CFL lamps and electronic drive circuit combined with competitive prices have begun.