How to choose the LED controller?
时间: 2013-04-17 10:49:59 来源: 深圳市踏奇科技有限公司
LED controller is through the chip control LED lights in the circuit of each position switch. With the increasing popularity of LED light source, more and more clients use to the LED controller, the choose and buy a lot of clients in controller with no, now we are on the market at present the mainstream LED controller answer questions as follows:
A, low voltage type high power LED product controller
Low voltage type LED products general design voltage 12 V-36 V, each loop LED number 3-6 in series, with resistance buck the current limit and each loop current 20 mA below. A LED products by multiple loop LED, the advantage is low voltage, the structure is simple, easy to design; Defect is: when a large current products, need to be configured low pressure switch power supply. Due to the disadvantages of products limited, low pressure may not long-distance transmission, are limited to small products, such as placard text, small design, etc. According to this characteristic, controller design specification: 12 V choose 75 A / 30 V MOS power tube control, the output current 8 A/road; 24 to 36 V choose 60 A / 50 V MOS power tube control, the output current 5 A/road. The user can according to the above specification is selected poems of the controller, jump to change can choose and buy the NE20 low voltage series, the choose and buy of gradual change NE10 low voltage series controller can. Pay attention to the total is LED to Yang (+) a connection method, control the Yin () extremely, controller does not include low voltage power supply.
Second, high pressure type LED products controller
High pressure type LED products design voltage is 220 V voltage ac/dc, each loop LED number 36-48 in series, each loop current 20 mA the following, the current limit means has two kinds, one kind is the resistance the current limit and the way the power consumption of the resistance is larger, suggest using every four LED combination of a 1/4 W metal mould resistance, heat uniform distribution, this method in the present is the most by stable and reliable; The other is the resistance capacitance series the current limit and the method of the voltage drop by most in capacitance, resistance power consumption is small, can only be used in the stable long bright state, if flashing capacitance energy storage, but voltage double, and LED damage easily. Use of the controller who LED must use resistance fault current way, LED general every loop of a meter, power 5 W, three color power every meters 15 W. Commonly used NE112K gradient controller control dc 1200 W, 4500 W NE103D ac load dc load 1500 W, if tubes more NE112K use flash unit, if only need to use NE103D overall flashing. If using a gradual way, should pay attention to load matching, neon and LED the luminous distribution characteristics, the same circuit can't mix by different types of load.
Three, low voltage type LED products serial controller
Low voltage type LED products the characteristics of serial controller is his control, using the serial signal transmission to the purpose of control, general 512 unit control only need four control attachment, serial LED to the light source in LED controller board with box, the controller can choose model NE040S controller and the controller of the maximum capacity to 4096 KBit, if load 512 unit LED can achieve 8192 largest picture frame.
Conclusion: through the interpretation of the various types of LED products controller characteristics and some problems of the let everybody can according to his own demand makes the corresponding LED the choice of the controller.
Shenzhen LED controller manufacturers