Design and implementation of mobile TV TFT Display Module

Mobile TV module (CN1010) key design techniques
SMS1010 is a multi-standard, multi-band, multi-interface, and low-power mobile TV chip, thus making the module design must be considered to be fully realized function of the chip advantage. CN1010 speaking on digital TV modules, in particular the following points must be considered when designing key technologies: ground design, power design, PCB design.
Ground all SiP design is the most challenging chip designs in part because the RF SiP chip internally integrated part and digital part, and in the external ground pin with ubiquitous, engineers must fully understand the requirements of each The role of the root ground, the only way to a good analog ground, digital ground, the shield to effectively split and the final connection. In SMS1010 digital TV chip pins 127, the ground pin 32 there, and distributed in all directions in the BGA package, the full understanding of the role of each ground pin and then it is necessary to separate the ground. Every engineer knows that the analog and digital ground to separate the design, single-point ground, but good to know where engineers need to split, how to split the ground. CN1010 only effectively split the analog ground, digital ground and shield ground, but also for the SMS1010 multi-band technology is more evident among the three bands, RF, and between the figures were designed in isolation, thus greatly improving the CN1010's receiver sensitivity and robustness. Low Temperature Display
Power supply design CN1010 mobile TV module is a difficult, because SiP chip power supply pin fragmented and SMS1010 chip also has a unique low-power technology, so in the design of the power management circuit must consider not only to different standards of the RF power supply voltage, Core power supply and interface, you also need to consider how to make the SMS1010 chip low power consumption is maximized, so that the power consumption of the external circuit to maintain a minimum. SMS1010 Another feature is to support multi-standard, which also requires the power circuit must be designed to support a variety of standard mode the supply current. Therefore, we in the design of DC / DC technology to fully enhance the effectiveness of the use of the power, and the power to choose according to different filter capacitors, thus ensuring a stable and reliable power supply.
Digital TV module PCB design Another difficulty. Undoubtedly, the use of multi-layer PCB is an inevitable choice, but the choice of layers (4 layers / 6 layers / 8 layers) and the chip itself is the point spacing, processing technology, the module size has a complex relationship. CN1010 speaking on digital TV modules, because SMS1010 dot pitch 0.5mm, BGA127 package irregular distribution, and design requirements to provide customers with multiple interfaces, so had to play connect the chip pin hole, so that the production process is very complicated. In order to process complexity and balance between the cost of production, CN1010 chose the 4-layer process, namely component / analog signal layer, ground floor, power / signal layer, the auxiliary signal / ground layer, so the design of wiring difficulty increased, but the total cost of production is appropriate. Character OLED Display