Patent ID: 9287789
Filing Date: 2016-03-15
CPC Classification: H02M

Claim Text:
1. A converter input stage for transferring energy to an output stage: an input configured to couple to a supply source providing an input voltage; a pair of transformer coils; switching circuitry configured to energize the pair of transformer coils, wherein in energizing the pair of transformer coils, the switching circuitry is configured to apply an input signal to the pair of transformer coils according to the input voltage; and a limiting circuit coupled between the pair of transformer coils, and configured to cause the converter input stage to stop drawing energy from the supply source once an amount of charge drawn from the supply source reaches a specific value; wherein stored energy in a leakage inductance of the pair of transformer coils continues to provide power to the output stage for at least a period of time, once the limiting circuit has caused the converter input stage to stop drawing energy from the supply source.