LAMP DRIVING APPARATUS AND ILLUMINATION EQUIPMENT USING THE SAME

摘要

A lamp driving apparatus and an illumination equipment using the same are provided. The provided lamp driving apparatus is responsible for driving a lamp. When any one of two terminals of the lamp is opened or the lamp is over-voltage, the provided driving apparatus stops driving the lamp, and thus achieving the purpose of open lamp and over-voltage protection/detection.

主权项

1. A lamp driving apparatus, comprising:
a power switching circuit coupled between a DC input high-voltage and a ground potential, and configured to switch and output the DC input high-voltage and the ground potential in response to two output signals with a phase difference of 180 degrees, so as to generate a square signal; an LC resonator coupled to an output of the power switching circuit and configured to receive and convert the square signal, so as to generate a sinusoidal driving signal for driving a lamp; a control chip coupled to an input of the power switching circuit and operated under a DC operating voltage, and the control chip being configured to provide the output signals to control operation of the power switching circuit; and an open lamp and over-voltage detection circuit coupled to the control chip and connected across two terminals of the lamp, and the open lamp and over-voltage detection circuit being configured to: detect whether the lamp is opened or over-voltage; and send, when any one of the two terminals of the lamp is opened or the lamp is over-voltage, an abnormal signal indicating that any one of the two terminals of the lamp is opened or the lamp is over-voltage, to the control chip, wherein the control chip further stops providing the output signals in response to the abnormal signal.