Fairchild Semiconductor boundary-conduction mode (BCM) interleaving power factor correction (PFC) controller provides over 96% power conversion efficiency for AC-DC power supplies.

Applications include power supplies for digital TVs, desktop and entry-level server computers, front-end telecom systems and industrial power systems rated from 100W to 1000W.

Historically, the higher-efficiency and lower-cost BCM PFC converters are limited to about 300W of maximum power level. Interleaving extends the power range of BCM control while ripple current cancellation minimizes high peak currents.

By interleaving and keeping two power stages at 180º out of phase timing, the FAN9612 lowers conduction losses. These energy-conservation benefits help customers meet Energy Star and Climate Savers Computing Initiative requirements. 

By the interleaving of the power trains, the FAN9612 is also able to reduce the input filter size and reduce board space by as much as 10% compared to alternative systems.

The FAN9612 incorporates:

• Automatic phase disable to operate with only one channel under light-load conditions, minimizing power losses
• A low start-up and operating current
• Valley switching technology, minimizing losses at MOSFET turn-on
• Over-current and power-limit protection for each channel
• Two-level output over-voltage protection (OVP)
• Input brownout protection and line OVP
• Minimum restart timer frequency to avoid audible noise
• Maximum switching frequency clamps
• Programmable closed-loop soft-start which minimizes output voltage overshoot at start-up

Input voltage feed-forward function that minimizes output voltage variation versus line voltage.
 
Price each per 1000 pcs: FAN9612MX (16-Lead SOIC) $1.30, FAN9612N (16-Lead Plastic DIP)      $1.30                                                  

More information: http://www.fairchildsemi.com