The LED driver is a power converter that converts the power supply to a specific voltage and current to drive the LEDs. It seems to be inconspicuous in the design of the entire lighting product, but it is extremely critical. To meet the needs of the market, reducing costs, improving efficiency and reliability has become the most sought-after goal of every enterprise. LED as a new generation of light source, its plasticity on the light source is born to provide a differentiated development idea for many LED manufacturers. Nowadays, according to the development of the market, the LED bulb power supply has entered the market in a logical way. In 2015, the bulb lamp power supply will be All will be isolated by non-isolated alternatives. The current mainstream 3W drive power supply: 3W LED bulb is one of the largest consumer demand markets. The current mainstream solution is 3x1W, each lamp bead 3.3V/300mA, and the load is formed by three lamp bead series. It is 10V/300mA. Since the grid voltage is rectified and the output load voltage is quite different, the most suitable way is to drive the buck through the flyback isolation. However, the isolation circuit has a complicated structure, many devices, high cost, low efficiency, low reliability, and is not suitable for mass production. In contrast to the isolated circuit, the non-isolated circuit has a simple circuit, uses fewer devices, is small in size, has lower cost, and is more efficient. As the market demands cost and efficiency, non-isolated circuits are on the stage in the field of low-power LED drivers.
The fourdrinier Paper Making Machine is mainly used for making top grade corrugated base paper, test liner paper,medium paper, high quality light-weight paper (culture paper, newsprint, light weight specialty paper). This kind of peper machine needs to chosse papermaking type, dewatering structure of press section, arrangement of dryer cylinder group, sizing and finishing equipment according to different paper grades and operating speed requirements.
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