Patent ID: 9497850
Filing Date: 2016-11-15
CPC Classification: H05B,H05K,Y02B

Claim Text:
1. An apparatus comprising: a controller configured to generate a first control signal to control a flyback switch coupled to a primary-side transformer coil in an output stage of a switching power converter in a phase cut compatible, dimmable lighting system, wherein the controller is further configured to generate a second control signal to control a power dissipation circuit coupled in series with the flyback switch to dissipate excess energy in the flyback switch during a controlled power dissipation phase, and the controlled power dissipation phase exclusively occurs after a charging phase begins and before an end of a subsequent flyback phase of the switching power converter, wherein the excess energy comprises more energy than an amount of energy to be provided to a load coupled to the switching power converter plus inherent energy losses.