A Monolithic power supply which operates over a range of 30-264-V ac has been realized in a 500-V dielectrically isolated process. The circuit uses a GTO SCR current switch together with a series regulator to provide a 5-V de output.With the addition of a resistor, the output can be adjusted to 24-V. Output power is 250-mW at 5-V, increasing to 1 .2-W at 24-V. The die measures 2.0 X 2.3 sq. mm and is packaged in a 8 lead plastic mini dip.I.
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