Application of single-stage power factor correction in miniaturized design of AC-PDP switching power supply

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Application of single-stage power factor correction in miniaturized design of AC-PDP switching power supply [Copy link]

Application of single-stage power factor correction in miniaturized design of AC-PDP switching power supply

Abstract: The traditional AC plasma display (AC PDP) switching power supply adopts a two-stage circuit of power factor correction and DC/DC conversion. In view of its complex structure and large size, a single-stage power factor converter is designed to achieve the purpose of miniaturization.

Keywords: single-stage power factor correction; flyback conversion; color AC plasma display

With the continuous development of social informatization and the continuous improvement of advanced production technology, the color alternating current plasma display (AC-PDP), as a terminal for large-screen wall-mounted TVs and high-quality multimedia information display, has become larger and larger in screen size, with lower power consumption, simpler circuit structure and lower cost. As an important component of AC-PDP, the power supply is also developing in the direction of miniaturization and simplification.

Traditional AC-PDP power supplies generally adopt a two-stage solution, namely, a circuit topology of PFC stage + DC/DC conversion. They each have their own switching devices and control circuits. Although they can achieve good performance, they are too large, too expensive, and the circuits are relatively complex. Therefore, miniaturization has become a research direction for AC-PDP technology.

The complexity of the AC-PDP drive control circuit leads to the complexity of its switching power supply. Analysis shows that, whether from the perspective of energy transmission or from the perspective of volume occupied, the PFC module and the scanning drive electrode DC/DC conversion module occupy a considerable proportion. Therefore, the transformation of these two parts becomes a starting point for the miniaturization of the AC-PDP switching power supply. Based on the working principle of single-stage power factor correction, this paper proposes an improvement scheme for the AC-PDP electrode drive power supply module.