Power factor correction IC delivers 98% full-load efficiency

POWER INTEGRATIONS HiperPFS-4 power factor correction (PFC) controller IC is available with an integrated Qspeed low reverse recovery charge (Qrr) boost diode. The combination delivers greater than 98% full-load efficiency in PC, TV, and similar applications between 75 W and 400W. Device combines continuous conduction mode (CCM) PFC control circuitry, the boost diode and a 600V MOSFET in one device. Including the boost diode reduces heatsink mounting, leading to a simpler design and improved thermal performance. The built-in Qspeed diode also provides enhanced robustness against ac line surges since parasitic trace inductances are minimized, which in turn reduces voltage spikes seen by the power switch during transients by up to 50V.

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