Toshiba TDP-MT700 Manuale di servizio - Pagina 20

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Toshiba TDP-MT700 Manuale di servizio
MT700 Service Manual
4.1.4.2. Bridge rectifier and filter
Bridge convert the AC input into DC output ,and the CAP is AC filter.
4.1.4.3. 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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