The current status of the core components of LED flat lamp

Review: since the semiconductor device LED lamp belongs to the low voltage startup, the most basic requirement is the need to drive with low voltage power supply, constant current, and the current existing in the high light fast, for a long time the lights went dark and even burned lamps.

At present, there are three technical schemes of LED power supply:

1 resistance capacitance step-down: simple, less device, low cost, constant current. The main application of 3W and the following LED lamp configuration, and there is a breakdown of the danger of leakage caused by the lamp board, it requires the lamp body structure must be insulated;

2 non isolated power supply: the cost is moderate, the use of IC constant current, but also the risk of leakage caused by breakdown, but also requires the structure of the lamp body must be insulated.

3 isolated power supply: high cost, IC constant current, good security.

LED flat lamp in order to achieve a better light efficiency, the lamp strings are generally slender structure, so, in order to protect the heat dissipation of the LED lamp needs, are now using all aluminum structure as a cavity with heat dissipation. Non insulated aluminum lamp body, must be used to isolated power supply basic security, but also to provide constant current, ensure the service life of lamp. At present, the integrated ceiling industry in no limit for its products, have cut corners by RC buck, but also the use of non isolated constant current power supply; in order to deceive the market, also by filling inferior named colloid, waterproof, is actually afraid of poor dew in the driving scheme.

At the same time, the same as isolated constant current power supply, there are programs are reasonable, the configuration is comprehensive, whether the device is stable, the line is scientific, whether the process is rigorous and other advantages and disadvantages. Here, take only the circuit board, driven by poor quality paper core board, easy to absorb moisture, in use process, easily lead to short-circuit and burn; driven by high quality glass fiber board, with line stability, moisture proof and lasting advantage. In the production process of driving and driven by manufacturers of high quality specification for automatic placement and automatic wave soldering, no confusion, no weld, this is the workshop inferior products can not meet the process.