Gottlieb, Rackman & Reisman, P.C.
End of lamp life protection circuit with bi-level detections for the electronic ballast and method thereof
The configurations of an end of lamp life protection circuit for a ballast and a method thereof are provided in the present invention. The proposed circuit includes a voltage-dividing circuit receiving an input voltage and outputting a first and a second divided voltages and a switch apparatus raising the first divided voltage when the second divided voltage is less than a first pre-determined threshold value and turning off the ballast when the first divided voltage is higher than a second pre-determined threshold value.
Delta Electronics, Inc.
H
H05B
inventional
Ching-Ho Chao-Wei Yung-Chuan Edy
Chou Tsai Lu Chandra