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In this paper, a boost ac/dc converter is controlled by an on-time control IC FAN7530 to operate in critical conduction mode (CRM) and exhibits the capability of high power factor correction (PFC). In order to simplify the steady-state analysis, the operating principle is analyzed by a functional-block-diagram (FBD) method. The component considerations are also presented herein. Additionally, the...
In this paper, the small-signal model of a boundary conduction mode (BCM) boost power factor correction (PFC) converter controlled by a peak control current control IC L6561 is derived. Based on the derived mathematical model, a Type II compensator is thus well designed to make the boost converter exhibits the performances of high power factor and output voltage regulation. Finally, a 300 W prototype...
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