series form T8 Tube
25/10/2013 08:27
Common form of connection
In the application, by a plurality of LED according to certain laws common form of connection permutations and combinations , there are four , are described below .
A whole series form T8 Tube
Generally simple series connection in the way LED1-n, end to end , LED working current flowing equal. For the same size of the LED and batch , although a single voltage on the LED may have slight differences , but the LED is a current -mode device , thus ensuring consistent with their luminous intensity . So simple series in the form of the LED on with a simple circuit , links, and convenient. However, due to LED1-n two forms used for the series , when one LED fails open fails, it will cause the LED light string off , affecting the reliability .
Connected in series with bypass mode for the 1.1 LED Flexi way to improve . In this way each LED in parallel with breakdown voltage slightly higher than the LED voltage zener diode D1-n. LED work , due to the D1-n is not turned on, current flows mainly through the LED1-n string , and equal , LED1-n string normal light ; when LED1-n string for damage caused by light string open, because D1 -n conduction , ensuring current flows through the LED string , so only fault LED failure , and the entire string lights do not go out. Compared to the previous connection methods , greatly improves the reliability .
