Auxiliary Regulator for Switching Power Supply
Original Publication Date: 1986-Dec-01
Included in the Prior Art Database: 2005-Mar-09
An arrangement to improve efficiency of power supplies requiring auxiliary regulators is described. The switching frequency of switch mode power supplies has been steadily increasing and components are now available which allow operation at several hundred kilohertz. At these higher frequencies, very little power transformer inductance is required and a 5-volt output may be achieved with a single turn of wire. If a 12-volt output is needed (Image Omitted) in addition to the 5 volts, a 'hit' problem results. Two turns of wire will produce 10 volts, and three turns will produce 15 volts. Special winding techniques can produce partial turns, but they usually suffer from poor voltage regulation.