This is a simple low-cost 12 Volt 50W off-line switching power supply, which can be used for home projects or to learn operation of flyback converters. It can work over a universal AC line input range 90-264 VAC and provides a 12VDC output at more then 4A load. Line and load regulation is better then [...]

This document is an engineering report giving performance characteristics of a 24 W Flyback converter – 8 V @ 3 A. This design uses TOPSwitch-GX – an integrated IC comprising a high voltage MOSFET, and PWM controller.This document contains power supply specification, schematic, bill-of-materials, transformer documentation, printed circuit layout, and performance data. A photo of [...]

By using a gated-oscillator architecture instead of a clocked-PWM one, gated-oscillator-type switching regulators permit high efficiency over extended ranges of output current. This architecture eliminates the housekeeping currents associated with the continuous operation of fixed-frequency designs. Gated-oscillator regulators simply self-clock at whatever frequency is necessary to maintain the output voltage. Typically, loop-oscillation frequency ranges from [...]