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In the last few years, several low-cost power factor correctors (PFC) control techniques operating in continuous conduction mode (CCM) have been proposed in order to simplify the traditional control strategies based on an analog multiplier. This simplification makes sense in the case of relatively low-power and wide input voltage range applications. These techniques are focused in the boost converter...
This paper deals with a new control method for Power Factor Correctors. Control is carried out by a standard IC controller for peak current-mode dc-dc converters, with only an additional compensation ramp generator and peak detector. Neither an analog multiplier nor an input voltage sensor is needed to achieve quasi-sinusoidal line waveforms, which makes this method very attractive. The method is...
This paper presents a new control strategy for Power Factor Correctors (PFCs) used to drive High-Brightness Light- Emitting Diodes (HB-LEDs). This control strategy is extremely simple and it is based on the use of a conventional peak current- mode controller with a suitable selection of the compensation ramp waveform. In these conditions, an almost perfect sinusoidal line current is obtained at full...
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