Improving the power factor in electronic and electrical circuits can increase current-carrying capacity, improve voltage to equipment, reduce power losses and lower electric bills. Furthermore, a key requirement to sell products in the European Community is limiting harmonic emissions that couple into the ac line supply. With the tightening of standards that took effect on Jan 1, 2001 in the European Normative (EN) EN61000-3-2, power factor correction is now required for common office equipment.
Controller IC Simplifies Implementation of Power Factor Correction
Wed, 05/30/2001 - 11:55am
Fairchild Semiconductor International announces the FAN7527, a power factor correction (PFC) controller IC for use with power MOSFETs in electronic ballast and other low power ( The FAN7527, available in SOP and 8-pin DIP packages, is a boundary conduction, current-mode controller with low start up and operating current to minimize power loss and increase efficiency. The FAN7527's integrated R/C filter eliminates the need for external components. Adjustable over-voltage protection (OVP) circuitry improves turn on overshoot and current limiting characteristics. Other reliability enhancing features include no-load runaway protection and output drive clamping to limit overshoot of the power MOSFET gate.