LED driver with silicon controlled dimmer, apparatus and control method thereof

摘要

An apparatus can include: a bleeder circuit coupled to a DC bus of an LED driver having a silicon-controlled dimmer; the bleeder circuit being configured to control a voltage of the DC bus to vary in a predetermined manner by drawing a bleed current through a bleed path when in a first mode, and to cut off the bleed path when in a second mode; and a controller configured to control the bleeder circuit to be in the first mode before the silicon-controlled dimmer is turned on.