AN4105
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Application Note AN4105
Design Considerations for Switched Mode Power Supplies Using A Fairchild Power Switch (FPS) in a Flyback Converter
Introduction
Flyback switched mode power supplies (SMPS) are among the most frequently used power circuits in household and consumer electronics. The basic function of an SMPS is to supply regulated power to the load on the secondary, or output side. An SMPS typically incorporates a power transformer, secondary-side rectifier diodes, a switching semiconductor device with control IC, and peripheral circuitry. If the level of integration of the switching and control circuitry is not high enough, then additional, separate circuits will be required to acmodate all functions. Such additional ponents raise the overall SMPS cost and not unmonly reduce reliability. Fairchild Power Switches are highly-integrated ICs for power supply applications. They bine a high-voltage power MOSFET (Sense FET) and pulse width modulation (PWM) based...
