Research And Design Of TFT-LCD Power Management IC

With the wide use of portable electronics, multifunction is one of characteristics for portable electronics, which encounters some challenges. So the research on how to integrate several power management projects into one chip is of significance.Several kinds of power management projects are analyzed particularly in this paper, including the corresponding characteristics for every power management project. A multifunctional and multi-deferent chip, named XDJ6313 is given that follows. The design of XDJ6313 is described in detail in this paper, including the topology selection, the determination of system parameters, and the realization of system functions as well as simulation results. The chip is composed of one switching voltage converter, two charge pump converters and four line dropout regulators. In addition, the charge pump converters convert the output of switching voltage converter into the input of line dropout regulators. The novel summing comparator and the lossless current sensing construction are employed in this chip, which minimize the size of whole chip and complication level of circuits. This chip can work on three kinds of switching frequency, and there are Timer-Delay Fault Latch at all outputs, which can improve the management for XDJ6313. The works in this paper are of significance for somewhat reference to similar ASIC.The design of XDJ6313 employs the 0.6μm BCD process. The simulations for sub-blocks and whole circuits have been completed by using the EDA software, such as Workview and Hspice. The results of simulation indicate that the function of XDJ6313 is excellent.