1 Introduction - Current Status of Lighting Technology
More and more lighting control solutions are appearing in the current lighting industry, so the design of the power supply, the driving circuit of the lamp, the security protection, and the management interface have become more flexible. At present, lighting technology mainly includes mainstream fluorescent lamps, LED lamps and HID technology. Its wide application makes the power drive topology very different. The common Flyback, Buck, Boost and other structures are widely used. Whether the product design adopts advanced digital energy-saving control design, whether it supports flexible topology applications such as flyback, Buck, Boost, etc. The length of development cycle and time-to-market will determine the success or failure of the product. However, the traditional lighting scheme often uses special devices. Realized, it is difficult to meet the needs of rapid development.
Therefore, an excellent lighting platform solution undoubtedly needs to support flexible topology applications, and meet the dimming and networking requirements of today's mainstream lighting control solutions such as DALI, DMX512, 0-10V, wireless, infrared, etc. Shiqiang Telecom developed an intelligent lighting platform solution based on Renesas Electronics 78K0/Ix2 series MCUs, plus a rich reference design to provide effective lighting design solutions for lighting manufacturers in hardware circuits and software development. Guidance to help manufacturers more efficiently develop lighting systems with their own intellectual property.
2 78K0/Ix2 Series MCU Introduction
The 78K0/Ix2 series MCUs are high-performance 8-bit MCUs designed by Renesas for lighting applications. As shown in Figure 1, the MCUs are positioned to meet the high-resolution dimming control and abnormal detection of the current lighting market. Hot demand for protection, intelligent energy-saving control, etc., relying on a single MCU to achieve a low-cost, high-performance green energy-saving lighting system.
Figure 1-78K0/Ix2 Series MCU Design Concept
The 78K0/Ix2 series MCUs have built-in rich hardware resources and provide excellent hardware support for flexible lighting power drive design and dimming control. Specifically in:
a. 16 bit PWM timer maximum counting clock frequency 40MHz, output and comparator interlocking, PFC control, PWM output with 2 dead time control, suitable for driving half bridge / full bridge circuit, to achieve frequency conversion control;
b. Built-in op amp, multi-channel high-speed 10bit A/D and comparator and other analog circuits simplify peripheral circuits
c. The timer can trigger A/D sampling to capture the useful signal useful point
d. Comparator/external interrupt can realize hardware disable output function, fast response and ensure safety
e. Timer remote control interface and UART function, for infrared and wireless remote control applications, communication module with DALI bus interface, suitable for intelligent lighting control
f. Multiple protection modules: window type watchdog, clock monitoring, low voltage alarm, etc., reliable operation
Grid screen is a kind of screen which is composed of light bars. It is another name of light bar screen. Because its form is hollow type, net format, so people in the industry call it grid screen, hollow screen and so on. This kind of display screen is mainly used in outdoor walls, glass curtain walls, building tops, as well as outdoor anti-aircraft guns, sightseeing elevators, etc.
Due to the special structure of the product, different from the box type display screen, led grid screen has the following characteristics:
1. Light weight, small wind load
For the screen, light weight is our most intuitive experience. Because it is a screen grid, which enables the display to ventilate, so its wind load capacity is very strong.
2. High efficiency and low power consumption
Real energy saving comes from: high brightness, high light efficiency LED lights, high conversion efficiency power supply.
3. Highly integrated
Highly integrated (built-in power supply and receiving card, each unit can work independently; power supply and signal wire are connected).
4. IP67 high protection level
The grid screen has a high protection level of IP67, and the safety and stability of use are guaranteed.
5. easy to install
No steel structure installation, no air conditioning, can be installed before or after.
Outdoor DIP LED Curtain Screen
Curtain Dip Led Display,Flexible Led Curtain Display,Light Weight Led Curtain Wall Display,Led Strip Screen For Building External
Shenzhen Vision Display Technology Co,.LTD , https://www.ledvdi.com