Power Factor Correction - BenQ MP611 Product Service Manual

5.5 Power Factor Correction

The Power Factor Correction (PFC) like a Boost converter . The AC mains voltage is rectified by a bridge and the
rectified voltage delivered the the boost converter . This using a switching technique ,boost the recdtified input voltage
to a regulated DC output voltage Vo . The boost converter consists of a boost inductor (L) , a controlled power switch
(Q) , a catch diode (D) , an output capacitor (Co) ,and a PFC controller . PFC's goal id to shape the input current in a
sinsoidal fashion , in-phase with the input sinusoidal voltage .
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