Slide 1 Slide 2 Slide 3 Slide 4 Slide 5 Slide 6 Slide 7 Product List
Power Factor Correction Slide 5

The are two main types of power factor correction circuitry used: passive and active. Active circuitry is becoming cost effective and its performance is better than passive. Active PFC circuits use MOSFETs and rectifiers; to maximize efficiency, high voltages are switched at high speeds (hundreds of kHz). The illustration on this slide represents a typical PFC boost converter topology in which the MOSFET and rectifier must have high voltage capability and must be capable of high speed switching. The MOSFET and rectifier also must have low conduction losses in order to maximize efficiency. A point to remember is that the MOSFET is always used in conjunction with a rectifier.

PTM Published on: 2016-11-23