The Design And Research Of Two-channel LED Backlight Driver IC

The development that along with Chinese economy,LED shows a technical exaltation,the need of each profession to LED monitor sharply extends.Opposite and common CCFL fluorescence diode to say,LED has to give out light an efficiency higher,the achievement consume low,the service life is long,safe characteristicses,such as environmental protection and physical volume frivolity...etc..From LED the back is only driving of LCD TV booming development,not only show that the technique shows a Zhao exaltation and also becomes a more and more close people on the price.LED depends LED and drives chip power supply and drives light or light bead and gives out light and makes module give out light and shows.This text designs a style of two passages to rise pressed LED back simply driving chip is mainly applied to the LCD TV and display of medium-sized size.The chip supports two independent controls,the Heng flows stability to output and support PWM and analog at the same time two kinds of adjust light way,the better support district adjusts to only show mode with 3 Ds,can merge an use and support more controls to support a larger size LCD TV.Once supported flowing,led to press,lead,limit flow a protection,switch road protection,unusually output wait function,have the breadth scope importation electric voltage 0-20 Vs,work temperature at-20-85 Celsius degree,work the frequency is in the 100 khzs~1 Mhz,work electric current is 9~17 mas.This text elaborated LED principle and boost electric voltage convert electric circuit and design a style of suit big size LCD TV back light of,analyzed an internal son mold of system structure and chip piece design with imitate really as a result,give at the same time the system class imitate to really contrast test result and the whole machine with plank class as a result qualified experiment result,introduced a landscape to design medium regulation and plank class system design important point at the same time.