Onsemi has introduced a new high-power totem pole PFC (TP-PFC) controller that reduces development time and cost. Joining the NCP1680, which is suited for designs up to 350 W, the new NCP1681 extends ...
Average current-mode control, as shown in Figure 1, is common in continuous-conduction-mode (CCM) power factor correction (PFC). It has two loops: a voltage loop that works as an outer loop and a ...
Fairchild Semiconductor's FAN6920MRis an integrated critical mode PFC and quasi-resonant current mode PWM controller that meets regulatory requirements by providing >90 percent efficiency and 300mW at ...
In Part 1 of this article we discussed electric power basics and the need for and advantages of active power factor correction. The next question should be “Okay, then how does active PFC work?” ...
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