Patent ID: 9089019
Filing Date: 2015-07-21
Classification: H05B

Abstract:
1. A power saving arrangement for use with a phase cut dimmer, the power saving arrangement comprising: a power converter arranged to convert a received alternating current power signal to a direct current signal, said power converter comprising a primary side, a secondary side isolated from the primary side and an auxiliary power winding isolated from the primary side; a detector arranged to detect the presence, or absence, of the phase cut dimmer blocking a portion of an alternating current mains power sine wave from reaching the power converter, said detector coupled to the power converter secondary side, said detector arranged to: a controllable minimum holding current circuit in communication with the received alternating current power signal, said controllable minimum holding current circuit responsive to an output of said detector, wherein in the event that said detector detects the absence of the phase cut dimmer, the controllable minimum holding current circuit is disabled such that a minimum holding current is not provided.