The LED driving power supply for general lighting generally adopts a flyback converter circuit topology based on a PWM controller. Although this solution has a simple structure, it is generally not possible to use a traditional incandescent lamp with a triac (TRIAC) dimmer to dim the LED. This is because the incandescent lamp is a purely resistive load, and the AC / DC power supply The situation of the system is completely different from that of incandescent lamps. Use the iW3610 AC / DC digital power controller to construct a flyback LED driver, which can be compatible with all types of dimmers. The dimming range is 2% to 10%, and there is no flicker. When there is no dimmer The power factor reaches 0.9 and the coefficient efficiency reaches 85%. 1 Structure and characteristics of iW3610 The iW3610 is packaged in an 8-pin SOIC. The pin configuration is shown in Figure 1. The iW3610 chip integrates the startup and input voltage detection circuit, feedback signal adjustment circuit, A / D converter, D / A converter, dimmer detection and phase measurement circuit, constant current control circuit, overcurrent protection comparator, peak current Limit the comparator, chopping (chopping) circuit MOSFFT gate driver above the main power supply MOSFET gate driver, etc., as shown in Figure 2. The functions of each pin of iW3610 are as follows. Pin 1 (OUTPUT (TR)): MOSFFT switch gate drive output of the chopper circuit. Pin 2 (VSENSE): Transformer auxiliary winding sensing signal input, used for secondary side voltage feedback to adjust the output. Pin 3 (VIN): rectified output voltage detection signal input, used for dimmer phase detection, input undervoltage / overvoltage protection, and provides power supply current for the chip during startup. Pin 4 (VT): external shutdown control terminal. If the shutdown control is not used, a resistor should be connected to ground. Pin 5 (GND): Ground pin. Pin 6 (TSENSE): Primary current sensing input, used for cycle-by-cycle peak current control. Pin 7 (OUTPUT): Flyback converter MOSFET switch gate drive output. Pin 8 (VCC): controller power supply, start threshold is 12V, undervoltage shutdown threshold level is 7.5V. iW3610 uses digital control technology, including: chopper circuit, its role is to improve the power factor, to provide dynamic impedance for the dimmer; isolated flyback circuit topology, provides a low-cost solution, allowing the use of traditional incandescent lamp dimmer pair LED dimming. The iW3610 can detect the type of wall dimmer and measure the phase. The iW3610 switches in valley mode, and the efficiency can reach 85% without a dimmer. iW3610 adopts primary side feedback constant current control technology to obtain LED current regulation with tolerance of ± 5%.
Indoor Mobile LED Display description: compared with the traditional dance scenery and lighting, the display is single and the vision is tired. It is difficult to bring the visual expectation and the enjoyment of the visual beauty to the audience. Led Display is very easy to solve these problems. Shocking visual effect, active performance atmosphere, show more video content. The acquisition of these information is far greater than the effect of traditional dance scenery and lighting.
The indoor mobile rental screen has developed from the original big spacing pixels p7.62, P6 and P4 to the small spacing pixels p2.976, p3.91 and p4.81. The cabinet size has also developed from the original model to the easy to distinguish and install models of 500m * 500mm and 500mm * 1000mm.
Indoor Rental Led Display Features:
1. LED indoor rental screen is moving towards small spacing and high definition, and small LED display can show more content;
2. Air insertion and quick lock structure are adopted between screens, which are easy to disassemble and assemble, can be maintained in front and back, and can be transported by air box, fast and safe.
3. The module can be maintained before and after, and the single module can be disassembled for maintenance. When packing, there are positioning posts and strong magnets. There is no seam between modules.
4. The cabinet body is of die-casting aluminum structure, with elegant and beautiful appearance, light and thin weight and hard strength.
5. According to the requirements of the site, the angle can be adjusted inside and outside, inside and outside plus or minus 15 °, splicing into different shapes.
6. All aluminum structure, good heat dissipation, no fan, no noise.
7. The brightness can be adjusted. According to the indoor brightness, adjust the best light effect.
Application scenarios: performance rental, stage performance, shopping mall, hotel, wedding, commercial performance, etc.
Structure: the cabinet body is made of die-casting aluminum, with internal soft and hard links, external super five types of network cable and aviation plug links, and each box body is equipped with a quick lock.
Precautions: the screen body is often disassembled, and the edges and corners of the screen body are easy to bump. In the process of transportation, disassembly and installation, pay attention to handle with care. In the purchase process, let the manufacturer more with mask, bottom shell and the same batch of LED lights.
Indoor Led Display,Indoor Mobile Led Display,Indoor Mobile Led Screen,Mobile Led Screen Shenzhen Vision Display Technology Co,.LTD , https://www.ledvdi.com
