Patent ID: 8878453
Filing Date: 2014-11-04
Classification: H05B

Abstract:
1. A ballast, comprising: an inverter circuit that operates at a frequency to generate a current signal to energize one or more lamps; a current feedback circuit connected to the inverter circuit and adapted to connect to the one or more lamps and to receive current feedback from the one or more lamps, wherein the current feedback circuit is configured to operate between an enabled state and a disabled state, wherein the current feedback circuit is configured to control the frequency of the inverter circuit based on the current feedback when the current feedback circuit operates in the enabled state, and the current feedback circuit is disabled from controlling the frequency of the inverter circuit when the current feedback circuit operates in the disabled state, the current feedback circuit having a first input connectable to a ground potential terminal, wherein when first input is connected to the ground potential terminal the current feedback circuit operates in the disabled state and when the first input is unconnected to the ground potential terminal the current feedback circuit operates in the enabled state; and a switch circuit comprising: wherein the output of the switch circuit is connected to the first input of the current feedback circuit such that when the output of the switch circuit is connected to the ground potential terminal the current feedback circuit operates in the disabled state and when the output of the switch circuit is disconnected from the ground potential terminal the current feedback circuit operates in the enabled state.