ELECTRONIC BALLAST HAVING A CONVERTER WHICH CAN CONTINUE TO OPERATE IN THE EVENT OF LAMP FAILURE

摘要

The ballast has a converter for supplying power to a light-emitting device. The converter has a trapezoidal capacitor (C1) and a resistor connected in parallel to switching transistors (S1, S2). A microcontroller controls continuous operation of the converter, during failure of the light-emitting device. The controller then converts the low power transmitted during the control, into losses. An independent claim is also included for a method for operating a light-emitting device.