Power Electronics / Power Management


Power switch optimises flyback power supply designs

17 October 2007 Power Electronics / Power Management

Fairchild Semiconductor has introduced the Green FPS e-Series, a new family of Fairchild Power Switch (FPS) products that provides high energy efficiency and system reliability in DVD player, set-top box, LCD monitor and other 25 W and lower power supply designs. Based on Fairchild's proprietary valley switching technique, the Green FPS products are said to raise power conversion efficiency by 1% and reduce EMI by up to 5 dB compared to conventional hard-switch converter topologies.

These highly integrated FPS devices combine the functionality of a fully avalanche rated SenseFET, a current-mode pulse width modulation (PWM) IC and various protection functions, simplifying design and improving system reliability. Utilising advanced burst mode operation, the Green FPS e-Series devices meet standby power regulations by reducing standby power consumption to below 0,2 W at no load conditions and below 1 W at 0,5 W load.

Designs employing Green FPS e-Series products provide high system reliability and space benefits compared to discrete MOSFET controllers, RCC switching converters, or conventional hard-switching solutions due to space-saving 8-lead DIP and 8-lead LSOP packaging and the inclusion of a variety of protection circuitry. This circuitry includes over-voltage protection (OVP), overload protection (OLP), abnormal over-current protection (AOCP) and thermal shutdown protection (TSD). Additional features include an integrated fixed oscillator, under-voltage lockout (UVLO), optimised blanking and gate turn-on/turn-off driver, and temperature compensated precision current sources for loop compensation.

For more information contact Andrew Athanasiou, Arrow Altech Distribution, +27 (0)21 555 1884, [email protected], www.arrow.altech.co.za



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