Switched power supply for TV receiver - has transformer feedback winding with coupling to secondary windings chosen so that voltage on one is constant with load changes on other

摘要

The switched power supply for a TV has a transformer with two secondary windings generating two voltages, the second voltage being for a load with variable current consumption. An additional winding is for a control circuit for stabilisation of the supply voltage. The coupling factor being the second secondary winding and the additional winding is greater than the coupling factor between the first secondary winding and the additional winding, so that the first supply voltage remains constant when current consumption by the second load varies.