For digital television applications load point power supply design and analysis
The current digital TV for power supply design personnel puts forward some challenges, these TV set s are located in case by internal different locations of the independent modules of the platform design. These modules including tuner unit, the main system board, display driver, audio subsystem, LCD backlight drive and other components. Each subsystem consists of sensitive analog circuit, processor, CPU, ASIC and other various circuit, and each device has their own unique power supply requirements. Ac voltage to convert intermediate bus voltage, and then provide television internal modules. The voltage of the typical range for 12 ~ 15 v. Each module of the load point voltage regulator are will intermediate bus voltage conversion into each component need voltage.power load calculator
As shown in figure 1 shows LCD TV charts, chassis of every major subsystems are and key component module a in the picture given, this example include front-end tuner, motherboard, display driver and audio board. These components are from 12 v off-line power supply. In order to provide the required working voltage, must be in each module provides some form of load point voltage regulator. Table 1 lists each subsystem and module of the voltage and current requirements, as well as all additional requirements, such as sorting or tracking.power load unbalance
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